Title

Research and Development on Advanced Graphite Materials: Volume VI - Creep of Carbons and Graphites in Flexure at High Temperatures

Date

1962

Index Abstract

Contrails only

Photo Quality

Not Needed

Report Number

WADD TR 61-72 Volume VI

Corporate Author

National Carbon Company

Laboratory

Directorate of Materials and Processes

Extent

40

Identifier

AD0284469

AD0284469

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

1962-06

Abstract

Flexure creep tests have been made on molded carbons and several types of graphites over the temperature range from 2200° to 3000°C. The amount of creep was found to decrease for a carbon as the temperature of graphitization increased and as the holding time at graphitization temperature increased for times up to four hours.

activation energies were determined for several standard an experimental grades of graphite from the steady state creep rates. The activation energies ranged from 23 to 92 kcal/mole and appeared to be constant for each graphite. The flexure experiments demonstrated a marked dependence of the creep on the grain orientation for the more anisotropic graphites. The grain orientation showing the highest room temperature strength shows the lowest high temperature creep. Some of the factors which influenced the creep behavior are density, crystallite size, and the size, type, and orientation of the particles.

Subject

Carbon Black

Creep

Graphite

High Temperature

Crystal Structure

Deformation

Density

Grain Structures (Metallurgy)

Publisher

Wright-Patterson Air Force Base, OH : Directorate of Materials and Processes, Aeronautical Systems Division, Air Force Systems Command

Distribution Conflict

No

Provenance

Lockheed Martin Missiles & Fire Control

Type

report

Format

1 online resource

Creator

Seldin, E. J.