粒径制御されたアルミナの単粒研削試験における研削機構と残留き裂の関係

概要

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In order to descuss the effect of grain size on material removal mechanism and crack type beneath the groove, the single point grinding tests of alumina ceramics with three kinds of grain sizes were carried out by use of conical diamond. The specimens of dense alumina ceramics were prepared by hot isostatic pressing(HIP) after presintering at various temperatures. The state of grooves were observed by SEM, and grinding force were measured by dynamometer. Main conclusions are obtained as follows : (1)Material removal mechanism changed from pseudo-plastic flow type to brittle fracture type with increase in depth of cut. The depth of cut, which varied from pseudo-plastic flow type to brittle fracture type, was increased with decrease in grain size. (2)The crack type varied from lateral and median type to microcrack with increase in grain size. (3)The normal grinding force was influenced by material removal mechanism of alumina ceramics.
社団法人日本セラミックス協会の論文
1995-03-01