化学プロセスを用い作製したアルミナ/窒化ホウ素複合材料の快削性と接触損傷

概要

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The machinability and contact damage of Al_2O_3/BN nanocomposites fabricated through the chemical method were investigated in the present work. The Al_2O_3/BN microcomposites indicated considerably low fracture strength by adding BN particles, although machinability was improved. However, the nanocolnposites showed both high fracture strength and good machinability. Hertzian contact test were performed to evaluate the contact damage. From the result of SEM observation of the samples after this test, it was found that the damage of the monolithic Al_2O_3 and Al_2O_3/BN microcomposites have a classical Hertzian cone fracture and many large cracks, respectively, whereas the damage observed in the nanocomposites appeared to be quasi-plastic deformation. [Received July 28, 2003; Accepted August 29, 2003]
社団法人日本セラミックス協会の論文
2003-11-01