Fabrication of mullite-Mo multilayered FGM plate and its Thermal shock resistance

Abstract

Stress-relief-type mullite-Mo basic multilayered functionally graded material disks (FGM) were fabricated by powder metallurgy technique and the thermal shocking test were carried out using the specimens. Thermal stress developed when thermal shocking, as well as the residual thermal stress generated during sintering process, was calculated. Then the thermal shocking resistance of FGM plates were evaluated by considering the calculated and tested results. The influence of residual thermal stress on the stress distribution when thermal shocking were also evaluated.