ぜい性材料の固体微粒子によるージョン(第1報) : ガス圧焼結Si_3N_4の物性とージョン磨耗

概要

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Erosive wear by solid particle impingement was tested for 16 kinds of Si3N4 which were gas-pressure sintered at different temperatures using different raw material powders containing various amounts of additives. Testing conditions were as follows: # 30 SiC abrasive grains, abrasive grain speed of 250-300m/s and an impingement angle of 80°. The volume eroded was great when the target Si3N4 had a low density and large grain size. This corresponds to the tendency that the eroded volume increases with decreasing hardness and fracture toughness. The erosion results were tested four equations that relate the erosive wear to the hardness (Youngs modulus) and fracture toughness of the target. The equation V∝H-1/4Kc-4/3, which was proposed theoretically by Evans, was found to best describe the experimental results.
社団法人日本セラミックス協会の論文
1986-11-01