Calculation of multicomponent refractory-composite phase diagrams. Final report, 1 January-1 June 1986
Candidate materials being studied can be used at temperatures as high as 5000 /sup 0/F. In order to attain this goal, a series of refractory compounds are being considered that can be used as composites. These composites are based on combinations between carbon (C), zirconium (Zr), boron (B), and silicon (Si) or C, hafnium (Hf), B and Si. In order to investigate where melting can be expected in the candidate composite systems, coupled phase diagram/thermochemical descriptions of the Hf-B, Hf-C, Zr-B and Zr-C binary systems were developed and combined with previously derived descriptions of the B-C, Zr-Si-C binary systems in order to calculate the temperatures at which melting occurs in the composition ranges between C-ZrC-ZrB/sub 2/-B/sub 4/C, C-HfC-HfB/sub 2/-B/sub 4/C, HfC-SiC, ZrB/sub 2/-SiC and HfB/sub 2/-SiC.
- Research Organization:
- Manlabs, Inc., Cambridge, MA (USA)
- OSTI ID:
- 7009305
- Report Number(s):
- AD-A-192293/9/XAB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360602 -- Other Materials-- Structure & Phase Studies
BORIDES
BORON CARBIDES
BORON COMPOUNDS
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
DIAGRAMS
DOCUMENT TYPES
HAFNIUM BORIDES
HAFNIUM CARBIDES
HAFNIUM COMPOUNDS
MATERIALS
PHASE DIAGRAMS
PROGRESS REPORT
REFRACTORIES
REFRACTORY METAL COMPOUNDS
SILICON CARBIDES
SILICON COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM BORIDES
ZIRCONIUM CARBIDES
ZIRCONIUM COMPOUNDS