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PHASE QUILIBRIA IN THE BORON CARBIDE-SILICON CARBIDE SYSTEM

Technical Report ·
OSTI ID:4727805
The boron carbide -silicon carbide system is quasibinary and contains a eutectic of composition 70 450 deg C in a 2 wt% B/sub 4/C and 30 450 deg C in a 2 wt% SiC at a temperature of 2300 450 deg C in a 20 un. Concent 85% C. The solid solubility of both B/sub 4/C in SiC and SiC in B/sub 4/C is <2 wt% at this temperature, based on metallographic and x-ray analyses. The SiC corresponds to the hexagonal ( alpha ) allotrope when the compositions contain >50 wt% SiC. The cubic ( BETA ) form of SiC is stabilized in compositions that contain <50 wt% of SiC. (auth)
Research Organization:
Knolls Atomic Power Lab., Schenectady, N.Y.
DOE Contract Number:
W-31-109-ENG-52
NSA Number:
NSA-17-021668
OSTI ID:
4727805
Report Number(s):
KAPL-2216
Country of Publication:
United States
Language:
English

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