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).
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.
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).
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).
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:
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:
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).
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).
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:
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:
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 Experimental Evaluation of High purity silica Reinforced Ablative Composites as Nozzle Sections of 7 8 inch 19 8 CM Diameter Throat Storable propellant Rocket Engine written by Donald A. Peterson and published by . This book was released on 1967 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PYROLTIC CARBIDE DEVELOPMENT PROGRAM written by HIGH TEMPERATURE MATERIALS INC BOSTON MASS. and published by . This book was released on 1960 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The progress of a program aimed at the development of pyrolytic carbide for rocket nozzle applications is reported. The effort involved, for the most part, the deposition of silicon carbide from silicon tetrachloride-hydrocarbon vapors. Work was also undertaken on process equipment and instrumentation design.
Download or read book PYROLYTIC CARBIDE DEVELOPMENT PROGRAM written by and published by . This book was released on 1960 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The progress of a program aimed at the development of pyrolytic carbide for rocket nozzle applications is reported. The effort involved, for the most part, the deposition of silicon carbide from silicon tetrachloride-methane vapors. Work was also undertaken on process equipment and instrumentation design.
Download or read book Handbook of Carbon Graphite Diamonds and Fullerenes written by Hugh O. Pierson and published by William Andrew. This book was released on 2012-12-02 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a review of the science and technology of the element carbon and its allotropes: graphite, diamond and the fullerenes. This field has expanded greatly in the last three decades stimulated by many major discoveries such as carbon fibers, low-pressure diamond, and the fullerenes. The need for such a book has been felt for some time. These carbon materials are very different in structure and properties. Some are very old (charcoal), others brand new (the fullerenes). They have different applications and markets and are produced by different segments of the industry.Few studies are available that attempt to review the entire field of carbon as a whole discipline. Moreover these studies were written several decades ago and a generally outdated since the development of the technology is moving very rapidly and scope of applications is constantly expanding and reaching into new fields such as aerospace, automotive, semiconductors, optics, and electronics. In this book the author provides a valuable, up-to-date account of both the newer and traditional forms of carbon, both naturally occurring and man-made. This volume will be a valuable resource for both specialists in, and occasional users of carbon materials.
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).
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.
