サーメットの耐熱衝撃性評価への赤外線放射加熱法の適用 [in Japanese] Application of Infrared Radiation Heating Method to Evaluation of Thermal Shock Resistance of Cermet [in Japanese]
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Thermal shock resistance of cermets was tried to evaluate by the infrared radiation heating method that a thin circular disk is heated and fractured by infrared ray concentrated on the central area with a constant heat flux. Thermal shock fracture toughness R<SUB>2c</SUB> could be measured for specimens with an edge notch, while thermal shock strength R<SUB>1c</SUB> could not for the specimens without the notch. It was thought, however, that R<SUB>2c</SUB> might depend on radius of curvature of the edge notch. Using the data of R<SUB>2c</SUB>, thermal shock strength R<SUB>1c</SUB> was calculated from the consideration of stress concentration. As a result, it was considered that thermal shock strength R<SUB>1c</SUB> could be applied to evaluation of thermal shock resistance of cermet and thermal shock resistance of Ti(C, N)-Mo<SUB>2</SUB>C-Ni cermets increased with an increase in the content of nitrogen and Ni.
- J. Jpn. Soc. Powder Powder Metallurgy
J. Jpn. Soc. Powder Powder Metallurgy 44(3), 247-252, 1997-03-15
Japan Society of Powder and Powder Metallurgy