The Effects of Annealing on Surface Machining Damage of Alumina Ceramics
The Effects of Annealing on Surface Machining Damage of Alumina Ceramics
复制标题
退火对氧化铝陶瓷表面加工损伤的影响
DOI：
10.2109/jcersj.99.384
复制
发表时间：
1991
影响因子：
1.1
通讯作者：
E. Yasuda
中科院分区：
文献类型：
--
作者：
Y. Matsuo;T. Ogasawara;S. Kimura;Shigemi Sato;E. Yasuda
磨削过程在陶瓷工件表面附近产生残余应力和划痕裂纹。为了减少表面损伤层的影响，研究了退火对170号金刚石砂轮磨削氧化铝试样抗弯强度的影响。用X射线衍射法测量了表面残余应力，并利用简化模型讨论了表面残余应力对弯曲强度的影响。结果表明，经过退火处理后的氧化铝试样表面损伤层和抗弯强度均恢复到初始状态。残余压应力对垂直于磨削方向的微裂纹有一定的影响，使抗弯强度略有提高，但对平行于磨削方向的深划痕裂纹影响不大。
The grinding process induces residual stresses and scratch cracks near the surfaces of ceramic work-pieces. In order to reduce the influences of the surface damage layers, the effects of annealing on the bending strength of alumina specimens ground with a #170 diamond wheel were investigated. Surface residual stresses were measured by the X-ray diffraction method and the effects of residual surface stresses on the bending strength were discussed using a simplified model. As a result, the annealing process restored the surfaces damage layers and bending strengths of ground alumina specimens to the initial condition. The compressive residual stress influenced the micro-cracks perpendicular to the grinding direction and consequently the bending strengths increased slightly, however, they hardly influenced the deep scratch cracks parallel to the grinding direction.