Grindarbility of Sintered Alumina with Different Porosity
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概要
- 論文の詳細を見る
Several kinds of sintered alumina with different porosity were produced by a cold press and a normal sintering using fine alumina powers. The grindarbility was undergone for these specimens using 2 kinds of diamond wheels with different abrasive grain sizes. To consider for effects of residual pore on grindarbility and grinding mechanism, normal grinding force were measured and ground surfaces were observed with SEM. The results were summarized as follows:<BR>(1) The grinding mechanism of alumina with different porosity was changed by abrasive grain size of used grinding wheel. That is, in case of using grinding wheel with 800-mesh size, the grinding mechanism was dominated by plastic flow. On the other hand in case of using grinding wheel with 170-mesh size, that was governed by brittle fracture with large-scale cracks.<BR>(2) The sintered alumina with high porosity gave a low normal grinding force, while the grinding mechanism was dominated by plastic flow in using grinding wheel with 800-mesh size.<BR>(3) In chip generation by brittle fracture with large-scale cracks and plastic flow, using grinding wheel with 170-mesh size, the large-scale cracks were obstructed by residual pore, and the normal grinding force increased with increasing porosity at over 3.1vol% porosity.
- 社団法人 粉体粉末冶金協会の論文
- 1999-04-15
著者
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Kondo Yoshihito
Kagawa Industrial Technology Center
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Yokota Kozo
Kagawa Industrial Technology Center
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Takagi Jun-ichiro
Yokohama National University
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TSUKUDA Akira
Kagawa Industrial Technology Center
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TOMINO Hisakazu
Kagawa Industrial Technology Center
関連論文
- Study on chip forming in high-speed cutting
- Grindarbility of Sintered Alumina with Different Porosity
- Influence of Porosity on Grinding Performance of Porous Cast-iron Bonded Diamond Grinding Wheel made by Pulse Electic Current Sintering Method
- Mechanical Properties of Atomized Cast-iron Diamond Composite Porous Sintered Bodies made by Pulse Electric Current Sintering Method