Title

Research And Development On Advanced Graphite Materials. Volume XXXVII - Studies Of Graphite Deposited By Pyrolytic Process

Date

1964

Index Abstract

Contrails and DTIC

Photo Quality

Incomplete

Report Number

WADD TR 61-72 Volume 37

Creator

Higgs, P. H.

Bobka, R. J.

Seldin, E. J.

Zeitsch, K. J.

Finicle, R. L.

Corporate Author

Advanced Materials Laboratory, National Carbon Company

Laboratory

Air Force Materials Laboratory

Extent

116

NTRL Accession Number

AD601833

Identifier

AD0601833

AD0601833

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(616)-6915

DoD Project

7350

DoD Task

735002

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

None

Report Availability

Full text available

Date Issued

1964-05

Abstract

Work on pyrolytic or vapor-deposited graphite under this program has been 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 of graphite 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.

Publisher

Wright-Patterson Air Force Base, OH : Air Force Materials Laboratory, Research and Technology Division, Air Force Systems Command

Distribution Conflict

No

Provenance

IIT

Type

report

Subject

Pyrolysis

Graphited Materials

Temperature

Carbon

Hydrogen

Helium

Chlorine

Textiles

Argon

Velocity

Methane

Format

1 online resource