Elevated Temperature Mechanical Properties Of Zirconium Diboride Based Ceramics

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Elevated Temperature Mechanical Properties of Zirconium Diboride Based Ceramics

Author : Eric William Neuman
Publisher :
ISBN 13 :
Total Pages : 259 pages
Book Rating : 4.:/5 (882 download)

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Book Synopsis Elevated Temperature Mechanical Properties of Zirconium Diboride Based Ceramics by : Eric William Neuman

Download or read book Elevated Temperature Mechanical Properties of Zirconium Diboride Based Ceramics written by Eric William Neuman and published by . This book was released on 2014 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Research presented in this dissertation focused on the mechanical behavior of ZrB2 based ceramic at elevated temperatures. Flexure strength, fracture toughness, and elastic modulus were measured at temperatures up to 2300°C for three compositions: monolithic ZrB2 (Z); ZrB2 - 30 vol% SiC - 2 vol% B4C (ZS); and ZrB2 - 10 vol% ZrC (ZC). In argon, Z, ZS, and ZC had strengths of 210 (at 2300°C), 260 (at 2200°C), and 295 MPa (at 2300°C), the highest temperatures tested for each composition. Fractography was used extensively to characterize the strength limiting flaws as a function of temperature. Strength of ZS in argon was controlled by the SiC cluster size up to 1800°C, and the formation of B-O-C-N phases that bridged SiC clusters above 2000°C. For ZC, surface flaws introduced during specimen preparation were the source of critical flaws in the material up to 1400°C, sub-critical crack growth of surface flaws between 1600 and 2000°C, and microvoid coalescence above 2000°C. It was also shown that thermal annealing at either 1400, 1500, or 1600°C improves the strength and modulus of ZS at temperatures between 800°C and 1600°C. Heat treatment at 1400°C for 10 hours produced the largest improvement in strength, 430 MPa at 1600°C versus 380 MPa for the as processed material. As a whole, the research pointed to several key microstructural features currently limiting the mechanical properties at the highest temperatures. In particular, removal of unfavorable secondary phases, and improved control over microstructure, should be promising methods to improve the elevated temperature properties of ZrB2 ceramics."--Abstract, page iv.

Densification, Microstructure, and Mechanical Properties of Zirconium Diboride Based Ultra-high Temperature Ceramics

Author : Sumin Zhu
Publisher :
ISBN 13 :
Total Pages : 360 pages
Book Rating : 4.:/5 (313 download)

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Book Synopsis Densification, Microstructure, and Mechanical Properties of Zirconium Diboride Based Ultra-high Temperature Ceramics by : Sumin Zhu

Download or read book Densification, Microstructure, and Mechanical Properties of Zirconium Diboride Based Ultra-high Temperature Ceramics written by Sumin Zhu and published by . This book was released on 2008 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The first part of this dissertation was aimed at studying the densification of ZrB2 ceramics by pressureless sintering techniques. Various processes have been applied to coat ZrB2 powders with polymer precursors, which were used to produce C after charring. After sintering at 1900°C, relative density increased of ~70% for uncoated ZrB2 to >99% for ZrB2 coated with at least 1.0 wt% C. Thermodynamic analysis suggested that C reacted with and removed oxide impurities (ZrO2 and B2O3) that were present on the ZrB2 particle surfaces, which promoted densification by minimizing grain coarsening"--Abstract, leaf iv.

Handbook of Advanced Ceramics

Author : Dipankar Ghosh
Publisher : Elsevier Inc. Chapters
ISBN 13 : 0128057165
Total Pages : 75 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Handbook of Advanced Ceramics by : Dipankar Ghosh

Download or read book Handbook of Advanced Ceramics written by Dipankar Ghosh and published by Elsevier Inc. Chapters. This book was released on 2013-04-11 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ultra-High Temperature Ceramics

Author : William G. Fahrenholtz
Publisher : John Wiley & Sons
ISBN 13 : 111892441X
Total Pages : 601 pages
Book Rating : 4.1/5 (189 download)

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Book Synopsis Ultra-High Temperature Ceramics by : William G. Fahrenholtz

Download or read book Ultra-High Temperature Ceramics written by William G. Fahrenholtz and published by John Wiley & Sons. This book was released on 2014-10-10 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive book to focus on ultra-high temperature ceramic materials in more than 20 years Ultra-High Temperature Ceramics are a family of compounds that display an unusual combination of properties, including extremely high melting temperatures (>3000°C), high hardness, and good chemical stability and strength at high temperatures. Typical UHTC materials are the carbides, nitrides, and borides of transition metals, but the Group IV compounds (Ti, Zr, Hf) plus TaC are generally considered to be the main focus of research due to the superior melting temperatures and stable high-melting temperature oxide that forms in situ. Rather than focusing on the latest scientific results, Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications broadly and critically combines the historical aspects and the state-of-the-art on the processing, densification, properties, and performance of boride and carbide ceramics. In reviewing the historic studies and recent progress in the field, Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications provides: Original reviews of research conducted in the 1960s and 70s Content on electronic structure, synthesis, powder processing, densification, property measurement, and characterization of boride and carbide ceramics. Emphasis on materials for hypersonic aerospace applications such as wing leading edges and propulsion components for vehicles traveling faster than Mach 5 Information on materials used in the extreme environments associated with high speed cutting tools and nuclear power generation Contributions are based on presentations by leading research groups at the conference "Ultra-High Temperature Ceramics: Materials for Extreme Environment Applications II" held May 13-19, 2012 in Hernstein, Austria. Bringing together disparate researchers from academia, government, and industry in a singular forum, the meeting cultivated didactic discussions and efforts between bench researchers, designers and engineers in assaying results in a broader context and moving the technology forward toward near- and long-term use. This book is useful for furnace manufacturers, aerospace manufacturers that may be pursuing hypersonic technology, researchers studying any aspect of boride and carbide ceramics, and practitioners of high-temperature structural ceramics.

Densification and Thermal Properties of Zirconium Diboride Based Ceramics

Author : Matthew Joseph Thompson
Publisher :
ISBN 13 :
Total Pages : 430 pages
Book Rating : 4.:/5 (815 download)

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Book Synopsis Densification and Thermal Properties of Zirconium Diboride Based Ceramics by : Matthew Joseph Thompson

Download or read book Densification and Thermal Properties of Zirconium Diboride Based Ceramics written by Matthew Joseph Thompson and published by . This book was released on 2012 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The research presented in this dissertation focuses on the processing and thermomechanical properties of ZrB2 based ceramics. The overall goal was to improve the understanding of thermal and mechanical properties based on processing conditions and additives to ZrB2. To achieve this, the relationships between the thermal and mechanical properties were analyzed for ZrB2 ceramics that were densified by different methods, varying amounts of carbon, B4C, or TiB2 additions. Four main areas were investigated in this dissertation. The first showed that decreased processing times, regardless of densification method, improved mechanical strength to >500 MPa. This study also revealed that lower oxygen impurity contents led to less grain coarsening. The second study showed that higher heating rates narrowed the grain size distribution, which resulted in strengths above 600 MPa. However, the decreased processing times led to retention of ZrO2, which decreased the thermal conductivity. The third study revealed that carbon additions interacted with ZrO2 and WC impurities introduced during powder processing to form (Zr,W)C, which led to higher thermal conductivity than ZrB2 with no carbon added. The last area examined the effect of solid solution additions on the electron and phonon contributions to thermal conductivity. The formation of solid solutions decreased thermal conductivity to

Investigations Into the Elevated Temperature Slip Behavior of Zirconium Diboride

Author : Brett Hunter
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.:/5 (131 download)

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Book Synopsis Investigations Into the Elevated Temperature Slip Behavior of Zirconium Diboride by : Brett Hunter

Download or read book Investigations Into the Elevated Temperature Slip Behavior of Zirconium Diboride written by Brett Hunter and published by . This book was released on 2015 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra high temperature ceramics (UHTCs), which typically comprise carbides, nitrides, and borides, are a class of materials associated with high melting temperatures and high hardness. These materials offer a range of mechanical responses, from being very brittle to exhibiting significant plasticity as a function of composition and loading temperature. The purpose of this investigation is to characterize the slip mechanisms in ZrB2, where slip has been inferred but not definitively quantified. This work confirmed prior studies that dense dislocation arrays, with straight dislocation lines, exist under room temperature indents and demonstrates that such networks are highly localized to the load region. For elevated temperature deformation, ZrB2 has been reported to have a drop in flexural strength from 390 MPa at 1200 °C to 110 MPa at 1600 °C. Dynamical electron diffraction and image analysis confirmed basal, pyramidal, and prismatic slip which is rationalized by ZrB2's hexagonal close packed c/a lattice parameter ratio of 1.11, which is less than the ideal ratio of 1.63. The dislocation densities prior to and after this flexural strength drop were 1.3 x 1013 m-2 and 1.0 x 1013 m-2, respectively. This indicates that the reduction in strength was not significantly associated with increased dislocation nucleation but rather stress relaxation.

Mechanical Properties and Performance of Engineering Ceramics and Composites IV, Volume 30, Issue 2

Author : Dileep Singh
Publisher : John Wiley & Sons
ISBN 13 : 0470584254
Total Pages : 350 pages
Book Rating : 4.4/5 (75 download)

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Book Synopsis Mechanical Properties and Performance of Engineering Ceramics and Composites IV, Volume 30, Issue 2 by : Dileep Singh

Download or read book Mechanical Properties and Performance of Engineering Ceramics and Composites IV, Volume 30, Issue 2 written by Dileep Singh and published by John Wiley & Sons. This book was released on 2009-12-15 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gain insight into the mechanical properties and performance of engineering ceramics and composites. This collection of articles illustrates the Mechanical Behavior and Performance of Ceramics & Composites symposium, which included over 100 presentations representing 10 countries. The symposium addressed the cutting-edge topics on mechanical properties and reliability of ceramics and composites and their correlations to processing, microstructure, and environmental effects.

MAX Phases and Ultra-High Temperature Ceramics for Extreme Environments

Author : Low, I. M.
Publisher : IGI Global
ISBN 13 : 1466640677
Total Pages : 679 pages
Book Rating : 4.4/5 (666 download)

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Book Synopsis MAX Phases and Ultra-High Temperature Ceramics for Extreme Environments by : Low, I. M.

Download or read book MAX Phases and Ultra-High Temperature Ceramics for Extreme Environments written by Low, I. M. and published by IGI Global. This book was released on 2013-05-31 with total page 679 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceramics are a versatile material, more so than is widely known. They are thermal resistant, poor electrical conductors, insulators against nuclear radiation, and not easily damaged, making ceramics a key component in many industrial processes. MAX Phases and Ultra-High Temperature Ceramics for Extreme Environments investigates a new class of ultra-durable ceramic materials, which exhibit characteristics of both ceramics and metals. Readers will explore recent advances in the manufacturing of ceramic materials that improve their durability and other physical properties, enhancing their overall usability and cost-effectiveness. This book will be of primary use to researchers, academics, and practitioners in chemical, mechanical, and electrical engineering. This book is part of the Research Essentials collection.

Friction and Wear of Ceramics

Author : Bikramjit Basu
Publisher : John Wiley & Sons
ISBN 13 : 1119538408
Total Pages : 400 pages
Book Rating : 4.1/5 (195 download)

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Book Synopsis Friction and Wear of Ceramics by : Bikramjit Basu

Download or read book Friction and Wear of Ceramics written by Bikramjit Basu and published by John Wiley & Sons. This book was released on 2020-05-19 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the area of tribology broadly, providing important introductory chapters to fundamentals, processing, and applications of tribology. The book is designed primarily for easy and cohesive understanding for students and practicing scientists pursuing the area of tribology with focus on materials. This book helps students and practicing scientists alike understand that a comprehensive knowledge about the friction and wear properties of advanced materials is essential to further design and development of new materials. The description of the wear micromechanisms of various materials will provide a strong background to the readers as how to design and develop new tribological materials. This book also places importance on the development of new ceramic composites in the context of tribological applications. Some of the key features of the book include: Fundamentals section highlights the salient issues of ceramic processing and mechanical properties of important oxide and non-oxide ceramic systems; State of the art research findings on important ceramic composites are included and an understanding on the behavior of silicon carbide (SiC) based ceramic composites in dry sliding wear conditions is presented as a case study; Erosion wear behavior of ceramics, in which case studies on high temperature erosion behavior of SiC based composites and zirconium diboride (ZrB2) based composites is also covered; Wear behavior of ceramic coatings is rarely discussed in any tribology related books therefore a case study explaining the abrasion wear behavior of WC-Co coating is provided. Finally an appendix chapter is included in which a collection of several types of questions including multiple choice, short answer and long answer are provided.

Reactive Hot Pressing Of ZrB2-Based Ultra High Temperature Ceramic Composites

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (681 download)

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Book Synopsis Reactive Hot Pressing Of ZrB2-Based Ultra High Temperature Ceramic Composites by :

Download or read book Reactive Hot Pressing Of ZrB2-Based Ultra High Temperature Ceramic Composites written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Zirconium- and titanium- based compounds (borides, carbides and nitrides) are of importance because of their attractive properties including: high melting temperature, high-temperature strength, high hardness, high elastic modulus and good wear-erosion-corrosion resistance. The ultra high temperature ceramics (UHTCs) - zirconium diboride (ZrB2) and zirconium carbide (ZrC) in combination with SiC are potential candidates for ultra-high temperature applications such as nose cones for re-entry vehicles and thermal protection systems, where temperature exceeds 2000°C. Titanium nitride (TiN) and titanium diboride (TiB2) composites have been considered for cutting tools, wear resistant parts etc. There are problems in the processing of these materials, as very high temperatures are required to produce dense composites. This problem can be overcome by the development of composites through reactive hot processing (RHP). In RHP, the composites are simultaneously synthesized and densified by application of pressure and temperatures that are relatively low compared to the melting points of individual components. There have been earlier studies on the fabrication of dense ZrB2-ZrC, ZrB2-SiC and TiN-TiB2 composites by the following methods: Pressureless sintering of preformed powders at high temperatures (1800-2300°C) with MoSi2, Ni, Cr, Fe additions Hot pressing of preformed powders at high temperatures (1700-2000°C) with additives like Ni, Si3N4, TiSi2, TaSi2, TaC Melt infiltration of Zr/Ti into B4C preform at 1800-1900°C to produce ZrB2-ZrC-Zr and TiB2-TiC composites RHP of Zr-B4C, Zr-Si-B4C and Ti-BN powder mixtures to produce ZrB2-ZrC, ZrB2-SiC and TiN-TiB2 powder mixtures at 1650-1900°C Spark plasma sintering of powder mixtures at 1800-2100°C There has been a lack of attention paid to the conditions under which ceramic composites can be produced by simple hot pressing (~50 MPa) with minimum amount of additives, which will not affect the mechanical properties of the composi.

Processing, Microstructure, and Mechanical Properties of Zirconium Diboride-molybdenum Disilicide Ceramics and Dual Composite Architectures

Download Processing, Microstructure, and Mechanical Properties of Zirconium Diboride-molybdenum Disilicide Ceramics and Dual Composite Architectures PDF Online Free

Author : Ryan Joseph Grohsmeyer
Publisher :
ISBN 13 :
Total Pages : 261 pages
Book Rating : 4.:/5 (992 download)

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Book Synopsis Processing, Microstructure, and Mechanical Properties of Zirconium Diboride-molybdenum Disilicide Ceramics and Dual Composite Architectures by : Ryan Joseph Grohsmeyer

Download or read book Processing, Microstructure, and Mechanical Properties of Zirconium Diboride-molybdenum Disilicide Ceramics and Dual Composite Architectures written by Ryan Joseph Grohsmeyer and published by . This book was released on 2017 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This research had two objectives: characterization of processing-microstructure-mechanical property relationships of conventional ZrB2-MoSi2 ceramics at room temperature (RT) and 1500°C in air, and fabrication of ZrB2-MoSi2 dual composite architectures (DCAs) for use near 1500°C. Elastic moduli, fracture toughness, and flexure strength were measured at RT and 1500°C for 15 ZrB2-MoSi2 ceramics hot pressed using fine, medium, or coarse ZrB2 starting powder with 5-70 vol.% MoSi2, referred to as FX, MX, and CX respectively where X is the nominal MoSi2 content. MoSi2 decomposed during sintering, resulting in microstructures with ZrB2 cores and (Zr[subscript 1-x]Mo[subscript x])B2 shells via surface and grain boundary diffusion. Flexure strength at RT (700-800 MPa for FX, 560-720 MPa for MX, and 440-590 MPa for CX) was controlled by the maximum ZrB2 grain size, and toughness (2.7-3.9 MPa·m[superscript 1/2]) did not trend with MoSi2 content. At 1500°C toughness increased with MoSi2 content and ZrB2 grain size, and strength of FX and MX was controlled by oxidation damage at 1500°C. Strength of CX followed the opposite trend, with C10 exhibiting a strength of ~600 MPa. Four ZrB2-MoSi2 DCAs were fabricated by dispersing granules of selected ZrB2-MoSi2 compositions in matrices of different ZrB2-MoSi2 compositions. Strength limitation at 1500°C by differential oxidation of granules and matrix was resolved by compositional adjustment, but microcracking due to granule-matrix CTE mismatch limited strength to ~140 MPa at RT and ~360 MPa at 1500°C. The granule-matrix interface did not deflect cracks, and the toughness at 1500°C was 6.1-6.9 MPa·m[superscript 1/2], similar to that of conventional ZrB2-MoSi2 ceramics. CTE matching via addition of a third phase and use of a weak granule-matrix interface are recommended areas of focus for future development of high-temperature DCAs"--Abstract, page iv.

Mechanical Properties of Zirconium

Author : F. D. Rosi
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Mechanical Properties of Zirconium by : F. D. Rosi

Download or read book Mechanical Properties of Zirconium written by F. D. Rosi and published by . This book was released on 1952 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Handbook of Ceramic Composites

Author : Narottam P. Bansal
Publisher : Springer Science & Business Media
ISBN 13 : 0387239863
Total Pages : 547 pages
Book Rating : 4.3/5 (872 download)

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Book Synopsis Handbook of Ceramic Composites by : Narottam P. Bansal

Download or read book Handbook of Ceramic Composites written by Narottam P. Bansal and published by Springer Science & Business Media. This book was released on 2006-08-25 with total page 547 pages. Available in PDF, EPUB and Kindle. Book excerpt: This valuable handbook has been compiled by internationally renowned researchers in the field. Each chapter is focused on a specific composite system or a class of composites, presenting a detailed description of processing, properties, and applications.

Advanced Structural Ceramics

Author : Bikramjit Basu
Publisher : John Wiley & Sons
ISBN 13 : 9781118037294
Total Pages : 504 pages
Book Rating : 4.0/5 (372 download)

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Book Synopsis Advanced Structural Ceramics by : Bikramjit Basu

Download or read book Advanced Structural Ceramics written by Bikramjit Basu and published by John Wiley & Sons. This book was released on 2011-09-26 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the area of advanced ceramic composites broadly, providing important introductory chapters to fundamentals, processing, and applications of advanced ceramic composites. Within each section, specific topics covered highlight the state of the art research within one of the above sections. The organization of the book is designed to provide easy understanding by students as well as professionals interested in advanced ceramic composites. The various sections discuss fundamentals of nature and characteristics of ceramics, processing of ceramics, processing and properties of toughened ceramics, high temperature ceramics, nanoceramics and nanoceramic composites, and bioceramics and biocomposites.

Dynamic Mechanical Properties of Ceramics and Ceramic Composites at Elevated Temperatures

Author : Shuo Yang
Publisher :
ISBN 13 :
Total Pages : 422 pages
Book Rating : 4.:/5 (45 download)

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Book Synopsis Dynamic Mechanical Properties of Ceramics and Ceramic Composites at Elevated Temperatures by : Shuo Yang

Download or read book Dynamic Mechanical Properties of Ceramics and Ceramic Composites at Elevated Temperatures written by Shuo Yang and published by . This book was released on 1995 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:

High Temperature Mechanical Behaviour of Ceramic Composites

Author : Karl Jakus
Publisher : Elsevier
ISBN 13 : 0080523889
Total Pages : 569 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis High Temperature Mechanical Behaviour of Ceramic Composites by : Karl Jakus

Download or read book High Temperature Mechanical Behaviour of Ceramic Composites written by Karl Jakus and published by Elsevier. This book was released on 1995-06-28 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: High Temperature Mechanical Behavior of Ceramic Composites provides an up-to-date comprehensive coverage of the mechanical behavior of ceramic matrix composites at elevated temperatures. Topics include both short-term behavior (strength, fracture toughness and R-curve behavior) and long-term behavior (creep, creep-fatigue, delayed failure and lifetime). Emphasis is on a review of fundamentals and on the mechanics and mechanisms underlying properties. This is the first time that complete information of elevated temperature behavior of ceramic composites has ever been compacted together in a single volume. Of particular importance is that each chapter, written by internationally recognized experts, includes a substantial review component enabling the new material to be put in proper perspective. Shanti Nair is Associate Professor at the Department of Mechanical Engineering at the University of Massachusetts at Amherst. Karl Jakus is Professor at the University of Massachusetts at Amherst.

Innovative Processing and Manufacturing of Advanced Ceramics and Composites

Author : Zuhair A. Munir
Publisher : John Wiley & Sons
ISBN 13 : 9780470880586
Total Pages : 250 pages
Book Rating : 4.8/5 (85 download)

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Book Synopsis Innovative Processing and Manufacturing of Advanced Ceramics and Composites by : Zuhair A. Munir

Download or read book Innovative Processing and Manufacturing of Advanced Ceramics and Composites written by Zuhair A. Munir and published by John Wiley & Sons. This book was released on 2011-02-14 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: With continued discoveries and innovations, the field of materials synthesis and processing remains as it has been for many decades, a vibrant and fertile area for research and development. It comes, therefore, as no surprise that every Pac Rim conference has had considerable emphasis on this topic with many symposia devoted to various aspects of this field. This Ceramic Transactions volume represents selected papers based on presentations in four symposia during the 8th Pacific Rim Conference on Ceramic and Glass Technology, held in Vancouver, British Columbia, May 31-June 5, 2009.