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Author : George C. Rybicki
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (31 download)
Download or read book Indentation Plasticity and Fracture in Silicon written by George C. Rybicki and published by . This book was released on 1988 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781722301422
Total Pages : 30 pages
Book Rating : 4.3/5 (14 download)
Download or read book Indentation Plasticity and Fracture in Silicon written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-05 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of the ductile-brittle transition temperature of heavily doped silicon were carried out using indentation techniques. Diamond pyramid hardness tests were performed on the (100) face of heavily doped N-type and P-type and intrinsic silicon single crystals. Tests were performed over the range 200 C to 850 C and loads of 100 to 500 g were used. Samples were subsequently etched to reveal dislocation rosettes produced by indentation. Intrinsic silicon underwent a ductile-brittle transition at 660 C, P-type at 645 C and N-type at 625 C. Hardness values varied from 1.1 GPa at 700 C to 11.7 GPa at 200 C. Significant effects of hardness on doping were present only at the highest temperatures. Lower loads generally produced higher hardness but load did not affect the Ductile-Brittle Transition Temperature (DBTT). Fracture toughness values ranged from 0.9 MPa m(1/2) at 200 C to 2.75 MPa m(1/2) near the DBTT. Doping did not affect the fracture toughness of silicon. P-type doping increased the size of dislocation rosettes observed after indentation, but N-type did not, in contradiction of the expected results. Results are discussed in terms of the effect of doping on the dislocation mobility in silicon. Rybicki, George C. and Pirouz, P. Glenn Research Center RTOP 505-63-1A...
Author : George Charles Rybicki
Publisher :
ISBN 13 :
Total Pages : 168 pages
Book Rating : 4.:/5 (181 download)
Download or read book Indentation Fracture and Plasticity in Silicon written by George Charles Rybicki and published by . This book was released on 1988 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : R. C. Fung
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (112 download)
Download or read book Indentation Plasticity and Fracture of Si3N4 Ceramic Alloys written by R. C. Fung and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (953 download)
Download or read book The Response of Solids to Elastic/ Plastic Indentation written by and published by . This book was released on 1980 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new approach for analysing indentation plasticity and indentation fracture is presented, The analysis permits relations to be established between material properties (notably hardness, yield strength and elastic modulus) and the dimensions of the indentation and plastic zone. The predictions are demonstrated to be fully consistent with observations performed on a wide range of materials. The indentation stress fields can also be adapted to generate predictions of indentation fracture thresholds for the three dominant crack types: radial, median and lateral cracks. The predictions are generally consistent with experimental observations.
Author : Mei-Chien Lu
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.:/5 (29 download)
Download or read book The Influence of Cyclic Tangential Loading on Indentation Fracture written by Mei-Chien Lu and published by . This book was released on 1984 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Dylan John Morris
Publisher :
ISBN 13 :
Total Pages : 650 pages
Book Rating : 4.:/5 (319 download)
Download or read book Indentation Fracture of Low Dielectric Constant Materials written by Dylan John Morris and published by . This book was released on 2004 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Amit Datye
Publisher :
ISBN 13 :
Total Pages : 133 pages
Book Rating : 4.:/5 (116 download)
Download or read book Characterizing the Mechanical Behavior of Single and Polycrystalline Silicon Carbide Using Nanoindentation written by Amit Datye and published by . This book was released on 2014 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research aims at enhancing the fundamental understanding of mechanisms controlling the deformation and fracture of silicon carbide based ceramics (single- and poly-crystal). The role of microstructure and material properties on the energy absorption capability of SiC is studied. This research helps to improve the ability to quantitatively predict the initiation and propagation of fracture and the interaction between fracture and plasticity, which provides a step towards a mechanistic understanding of deformation and failure properties of ceramic single crystals and polycrystals. The validity of the indentation-cracking method for toughness measurement is examined using nanoindentation tests with different indenters (spherical, pyramidal). Pyramidal indenters with various centerline to face angles are used to produce a wide range of effective strains in the single and polycrystalline SiC. Crystal plasticity constitutive laws can be calibrated using below threshold indentation loads. Above threshold loads are used to construct a parametric map that delineates the dependence of the ratio of crack size and contact radius on indenter geometry, applied load, toughness, and hardness, thus providing important guidelines for the toughness measurement method. By examining the behavior of several SiC materials during nanoindentation experiments using spherical and pyramidal indenters, it is possible to make predictions about methods to improve the ductility and fracture toughness of SiC to optimize its energy absorption. The applicability of the area under the irreversible part of the indentation load displacement curve (energy dissipated during loading) to predict the performance of SiC under contact loading is examined.
Author : Michael Anthony Nastasi
Publisher : Springer Science & Business Media
ISBN 13 : 9780792321958
Total Pages : 646 pages
Book Rating : 4.3/5 (219 download)
Download or read book Mechanical Properties and Deformation Behavior of Materials Having Ultra-Fine Microstructures written by Michael Anthony Nastasi and published by Springer Science & Business Media. This book was released on 1993 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the emerging class of new materials characterized by ultra-fine microstrucures. The NATO ASI which produced this book was the first international scientific meeting devoted to a discussion of the mechanical properties and deformation behavior of materials having grain sizes down to a few nanometers. Topics covered include superplasticity, tribology, and the supermodulus effect. Review chapters cover a variety of other themes including synthesis, characterization, thermodynamic stability, and general physical properties. Much of the work is concerned with the issue of how far conventional techniques and concepts can be extended toward atomic scale probing. Another key issue concerns the structure of nanocrystalline materials, in particular, what is the structure and composition of the internal boundaries. These ultra-fine microstructures have proved to challenge even the finest probes that the materials science community has today.
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781792687310
Total Pages : 34 pages
Book Rating : 4.6/5 (873 download)
Download or read book Effect of Processing on Fracture Toughness of Silicon Carbide as Determined by Vickers Indentations written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-12-31 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several alpha-SiC materials were processed by hot isostatic pressing (HIPing) and by sintering an alpha-SiC powder containing boron and carbon. Several beta-SiC materials were processed by HIPing a beta-SiC powder with boron and carbon additions. The fracture toughnesses K(sub 1c) of these beta- and alpha-SiC materials were estimated from measurements of Vickers indentations. The three formulas used to estimate K(sub 1c) from the indentation fracture patterns resulted in three ranges of K(sub 1c) estimates. Furthermore, each formula measured the effects of processing differently. All three estimates indicated that fine-grained HIPed alpha-SiC has a higher K(sub 1c) than coarsed-grained sintered alpha-SiC. Hot isostatically pressed beta-SiC, which had an ultrafine grain structure, exhibited a K(sub 1c) comparable to that of HIPed alpha-SiC. Dannels, Christine M. and Dutta, Sunil Glenn Research Center NASA-TM-101456, E-4565, NAS 1.15:101456 RTOP 505-63-1A...
Author : Martin R. Castell
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (61 download)
Download or read book Indentation Plasticity in Semiconductors written by Martin R. Castell and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Maurice Gell
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (72 download)
Download or read book The Role of Plastic Deformation in the Cleavage Fracture of Iron-silicon Single Crystals written by Maurice Gell and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Adm Nasa
Publisher : Independently Published
ISBN 13 : 9781720213000
Total Pages : 26 pages
Book Rating : 4.2/5 (13 download)
Download or read book Delayed Fracture of Silicon: Silicon Sheet Growth Development for the Large Area Silicon Sheet Task of the Low Cost Silicon Solar Array Project written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-10 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bar specimens were cut from ingots of single crystal silicon, and acid etched prior to testing. Artificial surface flaws were introduced in specimens by indentation with a Knoop hardness tester. The specimens were loaded in four-point bending to 95 percent of the nominal fracture stress, while keeping the surface area, containing the flaw, wet with test liquids. No evidence of delayed fracture, and, therefore stress corrosion, of single crystal silicon was observed for liquid environments including water, acetone, and aqueous solutions of NaCl, NH4OH, and HNO3, when tested with a flaw parallel to a (110) surface. The fracture toughness was calculated. Chen, T. J. and Knapp, W. J. Unspecified Center NASA-CR-157313 NAS7-100; JPL-954836
Author : S. Weissmann
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (227 download)
Download or read book Fracture Studies in Silicon Crystals written by S. Weissmann and published by . This book was released on 1972 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: An X-ray diffraction method was developed to study the plastic and elastic strain distribution of a propagating crack in notched, wedge-shaped silicon crystals deformed by cantilever bending. The method is based on the disturbance of thickness contour fringes (Pendellosung fringes) of dynamically diffracting crystals by lattice defects, generated by the deformation process. The interaction of low-angle boundaries with the strain field emanting from the notch is described. (Author).
Download or read book In Situ Spectroscopic Study of the Plastic Deformation of Amorphous Silicon Under Nonhydrostatic Conditions Induced by Indentation written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Indentation-induced plastic deformation of amorphous silicon (a-Si) thin films was studied by in situ Raman imaging of the deformed contact region of an indented sample, employing a Raman spectroscopy-enhanced instrumented indentation technique (IIT). The occurrence and evolving spatial distribution of changes in the a-Si structure caused by processes, such as polyamorphization and crystallization, induced by indentation loading were observed. Furthermore, the obtained experimental results are linked with previously published work on the plastic deformation of a-Si under hydrostatic compression and shear deformation to establish a model for the deformation behavior of a-Si under indentation loading.
Author : Abdelmageed A. Elmustafa
Publisher :
ISBN 13 :
Total Pages : 328 pages
Book Rating : 4.:/5 (89 download)
Download or read book Indentation Size Effect written by Abdelmageed A. Elmustafa and published by . This book was released on 1999 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Xiaofei Zhang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (1 download)
Download or read book Indentation Fracture and Damage of Brittle Polymer Under Flat-tipped Cylindrical Indenter written by Xiaofei Zhang and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
