各種窒化ケイ素球の摩耗特性

概要

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The ball-on-disk method was applied to measure the wear behavior of Si_3N_4 balls sliding on SiC disk at the load of 10 kgf and velocity of 20 cm/s. Four kinds of Si_3N_4 balls from different sources were named A . B, C, D, in increasing order of their hardness or fracture toughness. The large grain structure and large porosity of Si_3N_4( A ) will explain its low hardness and low fracture toughness. The fine fibrous structure without porosity of Si_3N_4(D) may be the reason of its high hardness and high fracture toughness. The wear volume calculated from the wear scar on a Si_3N_4 ball sliding on the SiC disk was proportional to the weight loss and to the sliding distance. The wear of Si_3N_4 ball decreased with increasing hardness or fracture toughness, but on the contrary, the wear of SiC disk increased sharply. The Si_3N_4( C) ball, which has crystallized grain boundary phases, showed very low wear of ball but high wear of SiC disk.
社団法人日本セラミックス協会の論文
1989-02-01