Silicon Carbide Alloys.

reportActive / Technical Report | Accession Number: ADA125968 | Open PDF

Abstract:

SIC-AlN ceramics are fabricated by hot pressing a powder derived from carbothermal reduction of silica and alumina in nitrogen atm. Densities were greater than 99 theoretical. At high temp. a complete solid solution exists but at a low temp. below approx. 1800 C phase separation occurs by i Nucleation and growth, ii Cellular, and iii Spinodal mechanism. This indicates that a miscibility gap exists. Thermal conductivity, expansion coefficient, strength, fracture toughness and Youngs modulus were determined. Extensive electron microscopy was conducted.

Author(s):
Virkar, Anil V. ; Plichta, M. R. ; Rafaniello, W.
Author Organization(s):
UTAH UNIV SALT LAKE CITY DEPT OF MATERIALS SCIENCE AND ENGINEERING
Descriptive Note:
Final rept. 15 Dec 78-14 Sep 82,
Pagination:
0006

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
ARO-16062.3-MS
Contract/Grant Number(s):
DAAG29-81-C-0004, DAAG29-79-G-0042
Monitor Series:
16062.3-MS
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning
Modernization Areas:
Microelectronics
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*ALUMINUM COMPOUNDS, *NITRIDES, *CERAMIC MATERIALS, *SILICON CARBIDES, *REFRACTORY MATERIALS, POWDERS, MODULUS OF ELASTICITY, HOT PRESSING, STRENGTH(MECHANICS), FRACTURE(MECHANICS), COEFFICIENTS, THERMAL CONDUCTIVITY, EXPANSION
Field(s)/Group(s):
Ceramics, Refractories and Glass, Fabrication Metallurgy, Mechanics
Keyword(s):
Aluminum nitrides
Report Date:
1983 Feb 28