Effect of Chromium Diboride Additives on Strength Properties of NiAl-CrB2 Composites in a Wide Temperature Range

摘要

The compressive yield stress and bending strength of NiAl-CrB2 composites are studied in the 20-800A degrees C temperature range. The effect of the composite phase ratio and experimental temperature on the composite strength for different loading patterns is established. During tensile stresses, the introduction of 15 wt.% CrB2 into the intermetallic is optimal to ensure the maximum bending strength of the composite at 500A degrees C. The bending strength of NiAl-15 wt.% CrB2 composite at the experimental temperature 500A degrees C exceeds that of the starting NiAl, by a factor of 3.