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 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 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 Scientific and Technical Aerospace Reports written by and published by . This book was released on 1979 with total page 1074 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 1980 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1978 with total page 1080 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 Development of Graphite and Graphite Base Multicomponent Materials for High Temperature Service written by W. W. Lozier and published by . This book was released on 1960 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research and Development on Advanced Graphite Materials written by National Carbon Company and published by . This book was released on 1961 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Investigation of Carbon graphite Base Materials Suitable for Rocket and Ram jet Applications written by William D. Smiley and published by . This book was released on 1955 with total page 50 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 1304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
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.
Download or read book Carbide Nitride and Boride Materials Synthesis and Processing written by A.W. Weimer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 675 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbide, Nitride and Boride Materials Synthesis and Processing is a major reference text addressing methods for the synthesis of non-oxides. Each chapter has been written by an expert practising in the subject area, affiliated with industry, academia or government research, thus providing a broad perspective of information for the reader. The subject matter ranges from materials properties and applications to methods of synthesis including pre- and post-synthesis processing. Although most of the text is concerned with the synthesis of powders, chapters are included for other materials such as whiskers, platelets, fibres and coatings. Carbide, Nitride and Boride Materials Synthesis and Processing is a comprehensive overview of the subject and is suitable for practitioners in the industry as well as those looking for an introduction to the field. It will be of interest to chemical, mechanical and ceramic engineers, materials scientists and chemists in both university and industrial environments working on or with refractory carbides, nitrides and borides.
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 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.
