Heat Resistance of Si₃N₄ Joined with Ni-Cr Alloy Interlayer

Abstract

Joining strength of Si₃N₄ with a 80wt%Ni-20wt%Cr alloy interlayer was evaluated by a four point bending test at elevated temperatures in air. After holding at 1273K for 3.6ks, the average joining strength was 220MPa, which was almost the same as room temperature strength. Furthermore, after annealing for 75ks at 973K in air, the strength of the joints at room temperature did not decrease.