Fundamental Study and Equipment for Sintering and Testing of Cermet Bodies: VI, Fabrication, Testing, and Properties of 72 Chromium‐28 Alumina Cermets

Abstract

Physical properties, including firing shrinkage, density, modulus of rupture from 75" to 2400"F., stress-rupture life in cross bending and in tension at 1800" and at 2000"F., modulus of elasticity, tensile strength from 75" to 2000"F., comparative impact resistance, oxidation resistance, thermal expansion, and thermal-shock resistance, for the composition 28y0 alumina-72% chromium combine to indicate the potential value of this material in high stress applications at elevated temperatures where severe thermal shock may be encountered.While the thermal-shock resistance is much better than that possessed by the low-chromium highalumina bodies discussed in Part V, the mechanical properties at elevated temperatures do not appear to suffer as a result of the highly continuous metal phase in the more recently developed body.

Recent Developments in the Technology of Ceramic Materials for Nuclear Energy Service

“…mets of possible interest for reactor applications which have received recent attention are Cr-Al,O, and Sic-Si. Work at the Ohio State Engineering Experiment Station (2) shows that consistently pore free bodies of moderate shrinkage can be fabricated from the compositions 72 per cent chromium-28 per cent alumina to give bodies having a density of 5.9. High temperature strength properties may be adequate for applications at 800° F. and above.…”