Accession Number : AD0693859

Title :   HEAT-RESISTANT MATERIAL WITH SILICON CARBIDE AS A BASE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Tsukerman,S. A. ; Kvin,V. E. ; Kravchenko,A. T.

Report Date : 13 MAY 1969

Pagination or Media Count : 12

Abstract : A new high-temperature material, termed SG-60, is a silicon carbide-graphite composite in which the graphite is the thermostability carrier since it is more heat-conducting and softer (heat conductivity of graphite is 0.57 cal/g-cm-sec compared with 0.02 cal/g-cm-sec for silicon carbide) while silicon carbide is the carrier of high-temperature strength and hardness. The high covalent bonding strength of the atoms of silicon carbide (283 kcal/mole) accounts for its high decomposition temperature (above 2500 degrees C) (without melting) and hardness. This composite is obtained by means of thermochemical treatment of porous graphite with silicon in both liquid and gaseous states. In such a composite the positive properties of phase components (high oxidation resistance of SiC, high thermostability of graphite) can be combined while their negative properties (low thermostability of SiC, low hardness and strength of graphite) can be to some extent neutralized. (Author)

Descriptors :   (*HEAT RESISTANT MATERIALS, *COMPOSITE MATERIALS), SILICON CARBIDES, GRAPHITE, CORROSION RESISTANCE, REFRACTORY MATERIALS, USSR

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE