Crack-Free Processing of Hot-Pressed Silicon Nitride Ceramics Using a Pulsed YAG Laser : Fracture Strength and Residual Stress
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概要
- 論文の詳細を見る
This paper describes the effect of crack-free laser processing of hot-pressed silicon nitride ceramics on fracture strength and residual stress. The fracture strength of the processed test pieces was determined by three-point bending tests. The residual stress in the processed surface was characterized by X-ray diffraction measurement. The strength of the laser-processed workpieces was reduced to 90-80% compared with that of the ground workpieces because of subsurface layer damage, which included the heat-affected layer and the residual stress layer. In particular, the latter greatly affected the fracture strength because the higher compressive residual stress layer generated during grinding was released by laser processing. It is concluded that the newly developed crack-free processing technique has great industrial possibilities.
- 一般社団法人日本機械学会の論文
- 1992-12-15
著者
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MORITA Noboru
Department of Chemistry, Graduate School of Science, Tohoku University
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Watanabe Takehiro
Department of Gene Diagnostics and Therapeutics, Research Institute, International Medical Center of
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Morita Noboru
Department Of Mechanical Engineering Faculty Of Engineering Chiba University
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Watanabe T
Nagoya Univ. Nagoya Jpn
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Morita Noboru
Department Of Chemistry Graduate School Of Science Tohoku University
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Watanabe Takehiro
Department Of Mechanical Engineering Faculty Of Engineering Chiba University
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Yoshida Y
Department Of Mechanical Engineering Faculty Of Engineering Chiba University
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YOSHIDA Yoshitaro
Department of Mechanical Engineering, Faculty of Engineering, Chiba University
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Watanabe Takehiro
Department Of Electronics And Mechanical Engineering Chiba University
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