王昕,于薛刚,单妍,刘子峰,尹衍升

• 1:中国海洋大学材料科学与工程研究院
• 2:青岛科技大学材料科学与工程学院

摘要(Abstract)：

以ZrO2-Al2O3微-纳米复合陶瓷为研究对象,采用跟踪压痕裂纹法测试其裂纹扩展阻力曲线。结果表明,三种微-纳复合ZTA陶瓷的阻力曲线均为显著的上升曲线。成分相同、烧结温度高的试样和烧结温度相同、氧化锆含量少的试样,由于内晶颗粒数量多,阻力曲线的上升趋势更加明显。内晶颗粒附近区域产生位错网、亚晶界甚至微裂纹,使微-纳米复合ZTA陶瓷的断裂方式向穿晶断裂方向变化。裂纹穿晶扩展遇到的阻力大,所需要的裂纹扩展动力也大,形成开裂-止裂交替进行的裂纹扩展过程,故其阻力曲线上升明显。

关键词(KeyWords)： 复相陶瓷;ZTA陶瓷;阻力曲线;裂纹扩展

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(50542032);; 山东省自然科学基金项目(Y2005F15)

作者(Author): 王昕,于薛刚,单妍,刘子峰,尹衍升

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