Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Development Of Pyrolytic Graphite Silicon Carbide Composite Materials For Rocket Nozzle Applications Volume Iii Comparison Of Deposition Furnaces And A Generic Process Control System Specification
Download Development Of Pyrolytic Graphite Silicon Carbide Composite Materials For Rocket Nozzle Applications Volume Iii Comparison Of Deposition Furnaces And A Generic Process Control System Specification full books in PDF, epub, and Kindle. Read online Development Of Pyrolytic Graphite Silicon Carbide Composite Materials For Rocket Nozzle Applications Volume Iii Comparison Of Deposition Furnaces And A Generic Process Control System Specification ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Development of Pyrolytic Graphite/Silicon Carbide Composite Materials for Rocket-Nozzle Applications. Volume III. Comparison of Deposition Furnaces and a Generic Process Control System Specification by : G. E. Cort
Download or read book Development of Pyrolytic Graphite/Silicon Carbide Composite Materials for Rocket-Nozzle Applications. Volume III. Comparison of Deposition Furnaces and a Generic Process Control System Specification written by G. E. Cort and published by . This book was released on 1978 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the final volume in a three volume set describing the pyrolytic graphite/silicon carbide (PG/SiC) coating development work at the Los Alamos Scientific Laboratory (LASL). In this volume we compare the injector deposition furnace with the channel flow furnace that was developed at LASL during this program. They are compared for ease of scaling to larger sizes and modeling with existing computer programs, and relative ease of implementing changes. A specification is given for a generic process control system for the PG/SiC deposition. A recommended step-by-step procedure to develop a coating furnace for a specified rocket-nozzle part is outlined and an example of its use is given. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1979 with total page 990 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Development of Pyrolytic Graphite/Silicon Carbide Composite Materials for Rocket-Nozzle Applications. Volume I. The Injector Deposition Furnace by : T. C. Wallace
Download or read book Development of Pyrolytic Graphite/Silicon Carbide Composite Materials for Rocket-Nozzle Applications. Volume I. The Injector Deposition Furnace written by T. C. Wallace and published by . This book was released on 1978 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of instrumented engineering tests with a chemical vapor deposition furnace used to prepare pyrographite/silicon carbide codeposited material for rocket nozzle applications is described. Flow into the furnace is an axisymmetric confined jet with high Reynolds and low Mach number. The gas flow within the furnace is characterized by a large separated flow region with associated hot spot and a high level of turbulence. Methods of instrumenting and collecting data, methods for defining the furnace and process characteristics, test procedures, recording and reducing data, data analysis, and model development are documented. Analytical models of the furnace during transient and steady state operation were developed and the results compared with the data obtained. Characterization of the coatings obtained and the associated deposition kinetics are also presented. (Author).
Book Synopsis Development of Pyrolytic Graphite/Silicon Carbide Composite Materials for Rocket-Nozzle Applications. Volume II. The Channel Flow Deposition Furnace by : T. C. Wallace
Download or read book Development of Pyrolytic Graphite/Silicon Carbide Composite Materials for Rocket-Nozzle Applications. Volume II. The Channel Flow Deposition Furnace written by T. C. Wallace and published by . This book was released on 1978 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of instrumented engineering tests is described in which a 'channel flow' chemical vapor deposition furnace was used to prepare pyrolytic graphite/silicon carbide (PG/SiC) codeposited material for rocket-nozzle applications. The nozzle section and a water cooled center body formed a vertical annular flow passage for the coating gases. The nozzle section was inductively heated and was coated on the i.d. only. Well-mixed process gas entered the flow annulus with uniform velocity, temperature, and species concentrations from a plenum below the heated substrate. The flow could be either laminar or turbulent, but did not contain recirculating regions. An analytical model of the furnace and deposition process was developed to simulate the heat transfer in the solid components and the flow, chemical kinetics, and heat and mass transport associated with the process gas. Model predictions and test results on temperatures and PG/SiC deposition rates agreed very well. The coating microstructure and inferred quality were characterized by metallography and correlated with the process variables. The report includes detailed descriptions of the furnace, instrumentation, and test procedures in addition to plots of all reduced data. (Author).
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1978-11 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1978 with total page 1308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AFRPL Graphite Performance Prediction Program by :
Download or read book AFRPL Graphite Performance Prediction Program written by and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A combined experimental and analytic program was conducted to develop improved procedures for predicting the ablation performance of graphite materials in rocket nozzles. Particular emphasis was placed on conditions representative of the throat region of an MX nozle design which would use graphite materials that are representative of the current state of materials development. New kinetic response correlation functions were developed for G-90 and ATJ bulk graphites, 15% silicon carbide modified pyrolytic graphite, c plane pyrolytic graphite, and Pyrocarb 901 carbon-carbon. These functions were included into the Aerotherm GASKET code along with several modifications to improve on thermochemical modeling accuracy. This modified code, GASKET2, includes a number of new chemical species, improved generalized input requirements, and kinetically controlled carbon sublimation models. The GASKET2 code was used in a number of performance studies to predict the performance of a number of rocket nozzles to be tested in other Air Force programs. The rocket nozzle ablation performance prediction procedures for several rocket motor fabricators were mutually compared to determine the probable ranges of predicted variables. These ranges were used in an ablation rate sensitivity study to define the most critical parameters. The mass transfer coefficient and the kinetic rate constants were shown to be the most critical parameters to be accurately known. (Author).
Book Synopsis AFRPL Graphite Performance Prediction Program by :
Download or read book AFRPL Graphite Performance Prediction Program written by and published by . This book was released on 1976* with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: A combined experimental and analytic program was conducted to develop improved procedures for predicting the ablation performance of graphite materials in rocket nozzles. Particular emphasis was placed on conditions representative of the throat region of an MX nozle design which would use graphite materials that are representative of the current state of materials development. New kinetic response correlation functions were developed for G-90 and ATJ bulk graphites, 15% silicon carbide modified pyrolytic graphite, c plane pyrolytic graphite, and Pyrocarb 901 carbon-carbon. These functions were included into the Aerotherm GASKET code along with several modifications to improve on thermochemical modeling accuracy. This modified code, GASKET2, includes a number of new chemical species, improved generalized input requirements, and kinetically controlled carbon sublimation models. The GASKET2 code was used in a number of performance studies to predict the performance of a number of rocket nozzles to be tested in other Air Force programs. The rocket nozzle ablation performance prediction procedures for several rocket motor fabricators were mutually compared to determine the probable ranges of predicted variables. These ranges were used in an ablation rate sensitivity study to define the most critical parameters. The mass transfer coefficient and the kinetic rate constants were shown to be the most critical parameters to be accurately known. (Author).
Book Synopsis Summary of the Ninth Meeting of the Refractory Composites Working Group by : E. S. Bartlett
Download or read book Summary of the Ninth Meeting of the Refractory Composites Working Group written by E. S. Bartlett and published by . This book was released on 1965 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Pressure-carbonization of Carbon Bonded Silicon Carbide-graphite for Use in Uncooled Rocket Nozzles by : Telesphore L. Charland
Download or read book The Pressure-carbonization of Carbon Bonded Silicon Carbide-graphite for Use in Uncooled Rocket Nozzles written by Telesphore L. Charland and published by . This book was released on 1955 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transfer among perceptual-motor paired-associate tasks was studied as a function of constant and varied training conditions. Over two days of training, one group practiced the same task on both days (constant conditions), while training was varied for two other groups. One of these groups practiced 10 different tasks, five tasks each day; the other group practiced 10 different pairings of the stimuli and responses of the same task, five pairings each day. Following training, all groups were tested for transfer to three additional tasks.
Download or read book Corrosion Abstracts written by and published by . This book was released on 1974 with total page 1066 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Pyrolytic Refractory Materials for Solid-fuel Rocket Motor Applications by : RONALD. FRANCIS
Download or read book Development of Pyrolytic Refractory Materials for Solid-fuel Rocket Motor Applications written by RONALD. FRANCIS and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continued investigations of the preparation and evaluation of refractory metal alloys of pyrolytic graphite as a function of synthetic parameters are presented. Induction furnace modifications for vapor plating to temperatures in excess of 2500 C, development of analytical techniques, development of coating procedures on complex shapes and additional oxidation data of the materials are reported. Methods of producing satisfactory coatings of various pyrolytic graphites and alloys on graphite nozzles for test firings with Arcocel 163 (6500 F, aluminized) propellant are also described. (Author).
Book Synopsis A Unique High-temperature, High-pressure Crystal Growth System for Silicon Carbide by : J. R. Littler
Download or read book A Unique High-temperature, High-pressure Crystal Growth System for Silicon Carbide written by J. R. Littler and published by . This book was released on 1973 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A high-pressure, high-temperature furnace system is described for crystal growth experiments using crucibles up to 13 cm in diameter and 26 cm high. The vertical temperature gradient is electronically controlled during growth such that the ends of the crucible can be maintained at temperatures above or below the crucible center. Temperatures up to 2800C can be maintained at pressures up to 50 atmospheres. A vacuum capability up to .000001 torr at 1800C has been incorporated into the system. Single crystals of alpha silicon carbide grown in this system at 2600C are described to illustrate its use. (Author).
Book Synopsis Silicon Carbide Ceramics by : S. Somiya
Download or read book Silicon Carbide Ceramics written by S. Somiya and published by Springer Science & Business Media. This book was released on 1991-08-31 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon carbides have major industrial uses as high temperature structural ceramic materials. These two volumes are translated from the Japanese and provide a comprehensive account of the seminal work going on in Japan.
Book Synopsis IMPROVEMENT OF THE USEFULNESS OF PYROLYTIC GRAPHITE IN ROCKET MOTOR APPLICATIONS. by :
Download or read book IMPROVEMENT OF THE USEFULNESS OF PYROLYTIC GRAPHITE IN ROCKET MOTOR APPLICATIONS. written by and published by . This book was released on 1963 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Carbon/Carbon Composites--Solid Rocket Nozzle Material Processing, Design, and Testing by : A. Canfield
Download or read book Carbon/Carbon Composites--Solid Rocket Nozzle Material Processing, Design, and Testing written by A. Canfield and published by . This book was released on 1972 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: One hundred and one ring shapes (2 to 16 in. in diameter) of carbon/carbon composites have been tested and evaluated to determine the processing cycle, the design properties, the ablative performance in a solid rocket nozzle environment, and the reinforcement tailoring for design applications. A carbon/carbon composite with a carbon or graphite reinforcement (cloth, fiber, felt, yarn, or granular) and a carbon or graphite bonding matrix (pitch, resin, or pyrolytic graphite) has demonstrated a capability to replace a warm standard nozzle ablative (carbon or graphite cloth phenolic) and room temperature structural (steel or aluminum) shells with a single hot material nozzle design. The carbon/carbon material provides an improved nozzle and missile performance through a lower nozzle weight volume and simpler design. The carbon/carbon material uses a 5500 F maximum processing cycle and develops a room temperature ultimate strength and modulus ranging from 3 to 88 ksi and 1.2 to 17.0 x 106 psi, respectively, an ablation erosion rate of 0 to 10 mil/s, and a reinforcement orientation of 0 to 90 deg with respect to the nozzle center line. In addition, the material offers good mechanical properties, dimensional stability, and structural integrity for a nozzle operating temperature of 5500 F and a pressure of 500 psi. The carbon/carbon limitations are longer procurement time, a need for additional processing and material properties, a high cost per pound in development quantities, and a greater design application analysis time than with existing standard ablative and structural materials.
Book Synopsis Gas Phase and Surface Modeling of Chemical Vapor Deposition of Pyrolytic Carbon on Silicon Carbide Fibers Using a Pure Methane Precursor by : Rajesh Balachandran
Download or read book Gas Phase and Surface Modeling of Chemical Vapor Deposition of Pyrolytic Carbon on Silicon Carbide Fibers Using a Pure Methane Precursor written by Rajesh Balachandran and published by . This book was released on 2011 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ceramic matrix composites (CMC) constitute a category of composite materials widely used in the aerospace industry as they satisfy the thermal, chemical and mechanical requirements of a good composite material with the drawback being in the high processing costs. Chemical vapor deposition is a process long known for its importance in aerospace and structural applications. Chemical vapor deposition can be used to develop thin interfacial coatings on fibers, which are reinforced in to a matrix according to the application. The interfacial layers are useful for preventing reactions between the fibers and the matrix material at high temperatures. Interfacial coatings can also deflect crack propagation once the composite is put into service. This work focuses on developing a suitable gas phase and surface kinetics model for obtaining the deposition profiles in the chemical vapor deposition of pyrocarbon on silicon carbide fibers at the given conditions of temperature, pressure and feed rate. The model uses an existing gas phase mechanism (National Institute for Standards and Technology and Gas Research Institute). There are combinations of species in the gas phase, but all of them do not lead to the deposition of pyrocarbon. This raises a question as to which of them would affect the rate of deposition and why. For the given conditions of temperature, pressure and flow rate and from the information available in different literature sources acetylene is assumed to be the major depositing specie of pyrocarbon Also, the gas phase mechanism was modified to simplify and suit the needs of the given conditions. The importance behind modeling the surface kinetics is that it could help understand the actual process in the formation of pyrolytic carbon. The mechanism of the pyrocarbon deposition could be important in knowing the type of carbon being deposited, which is of utmost importance in its applications. The modeling data is validated by means of using data obtained from experiments.
