Thermal Shock Damage and Mechanical Property of MoSi₂ Materials by NDE Technique

Abstract

The mechanical property of sintered MoSi2 materials has been investigated, based on the detailed examination of their microstructures. The nondestructive technique by an ultrasonic wave was also used for evaluating the damage behaviors of MoSi2 materials suffered from the cyclic thermal shock. MoSi2 materials were sintered at the temperature of 1723 K. The flexural strength of MoSi2 materials gradually decreased with increasing the thermal shock cycle, accompanying the extensive creation of surface cracks. The increase of thermal shock cycles resulted in a great decrease of ultrasonic wave velocity and a linear increase of attenuation coefficient for MoSi2 materials.

Characteristic evaluation of liquid phase-sintered SiC materials by a nondestructive technique

“…Unfortunately, there are few studies for the thermal shock damages of LPS-SiC materials. It is also important to establish the nondestructive technique by various sources such as acoustic emission, ultrasonic wave and laser probe for the examination of damage degree in structural materials [9][10][11]. The nondestructive technique has an important role on the investigation of microstructure and mechanical property for LPS-SiC materials.…”