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Research and Development on Advanced Graphite Materials. Volume XXXVII. Studies of Graphite Deposited by Pyrolytic Processes.

AD601833

Publication Date	1964
Personal Author	Higgs, P. H.; Finicle, R. L.; Bobka, R. J.; Seldin, E. J.; Zeitsch, K. J.
Page Count	116
Abstract	Work on pyrolytic or vapor-deposited graphite under this program was limited to mechanism studies and property measurements. Methods of depositing high quality pyrolytic graphite are described with evidence as to the cause of conical growths and delaminations within the structure of the material. Results are presented on the use of hydrogen, helium and argon as diluents, and on the use of chlorine as an additive in the pyrolytic process. The mean deposition rate is shown to be a function of hydrocarbon concentration, diluent type, gas velocity, temperature and pressure. Theoretical studies of the equilibrium composition of methane as affected by changes in temperature and pressure are presented. Feasibility studies on the production of graphite of carbon vapor deposition were conducted which indicate that nonlamellar graphite with a predetermined degree of anisotropy can be produced by this method. Room temperature pull strength yarn has been increased as much as 360 per cent by reinforcement of the yarn with thin coatings of pyrolytic carbon; both single and multiple strand yarns have been coated. (Author)
Keywords	PYROLYTIC GRAPHITE GRAPHITE PYROLYSIS VAPOR PLATING PHYSICAL PROPERTIES MECHANICAL PROPERTIES THERMAL EXPANSION PRESSURE TEMPERATURE HYDROGEN HELIUM ARGON CHLORINE HYDROCARBONS ANISOTROPY FEASIBILITY STUDIES VELOCITY METHANE HEAT TREATMENT ORGANIC COATINGS CARBONS TEXTILES
Corporate Authors	National Carbon C Parma Ohio
Document Type	Technical Report
Title Note	Rept. for May 60-May 62.
NTIS Issue Number	196501
Contract Number	AF33 616 6915 PROJS.

Research and Development on Advanced Graphite Materials. Volume XXXVII. Studies of Graphite Deposited by Pyrolytic Processes.

Research and Development on Advanced Graphite Materials. Volume XXXVII. Studies of Graphite Deposited by Pyrolytic Processes.
AD601833

Publication Date	1964
Personal Author	Higgs, P. H.; Finicle, R. L.; Bobka, R. J.; Seldin, E. J.; Zeitsch, K. J.
Page Count	116
Abstract	Work on pyrolytic or vapor-deposited graphite under this program was limited to mechanism studies and property measurements. Methods of depositing high quality pyrolytic graphite are described with evidence as to the cause of conical growths and delaminations within the structure of the material. Results are presented on the use of hydrogen, helium and argon as diluents, and on the use of chlorine as an additive in the pyrolytic process. The mean deposition rate is shown to be a function of hydrocarbon concentration, diluent type, gas velocity, temperature and pressure. Theoretical studies of the equilibrium composition of methane as affected by changes in temperature and pressure are presented. Feasibility studies on the production of graphite of carbon vapor deposition were conducted which indicate that nonlamellar graphite with a predetermined degree of anisotropy can be produced by this method. Room temperature pull strength yarn has been increased as much as 360 per cent by reinforcement of the yarn with thin coatings of pyrolytic carbon; both single and multiple strand yarns have been coated. (Author)
Keywords	PYROLYTIC GRAPHITE GRAPHITE PYROLYSIS VAPOR PLATING PHYSICAL PROPERTIES MECHANICAL PROPERTIES THERMAL EXPANSION PRESSURE TEMPERATURE HYDROGEN HELIUM ARGON CHLORINE HYDROCARBONS ANISOTROPY FEASIBILITY STUDIES VELOCITY METHANE HEAT TREATMENT ORGANIC COATINGS CARBONS TEXTILES
Corporate Authors	National Carbon C Parma Ohio
Document Type	Technical Report
Title Note	Rept. for May 60-May 62.
NTIS Issue Number	196501
Contract Number	AF33 616 6915 PROJS.