超声辅助磨削后纳米ZrO_2陶瓷的表面残余应力

Surface Residual Stress of Nano ZrO_2 Ceramic after Ultrasound Assisted Grinding

在自行研制的二维超声辅助磨削系统下对纳米ZrO2陶瓷进行了磨削加工,采用X射线衍射仪对其表面残余应力进行了测试,研究了磨削参数对其残余应力的影响,并与普通磨削后的表面残余应力进行了比较。结果表明:两种磨削方式下表面残余应力皆为压应力,且随着磨削深度的增大,两种磨削方式下表面残余应力均呈现出减小趋势,但超声辅助磨削后表面残余压应力的减小趋势较普通的缓慢;相同条件下,超声辅助磨削后表面残余压应力大于普通磨削的;其他参数不变,随着砂轮磨料尺寸的增大,两种磨削方式的表面残余压应力都呈上升趋势。

Nano ZrO2 ceramic was grinded on a self-designed two-dimensional ultrasound assisted grinding system and the surface residual stress of the ceramic was tested by XRD to study the effects of grinding parameters on it. The ordinary grinding surface residuaI stress was tested in comparison. The results show that in the two grinding modes the surface residual stresses were compressive stress, and show a decreasing trend with the increase of grinding depth. But the decrease trend of residual stress in ultrasonic grinding was slower than that in ordinary grinding. The surface residual stress in ultrasonic grinding was greater than that in the ordinary grinding under the same conditions. With the increased of abrasive size, the surface residual stress in two grind modes all increased if other parameters uncharged.