Influence of Porosity on Friction and Wear of Tetragonal Zirconia Polycrystal
Influence of Porosity on Friction and Wear of Tetragonal Zirconia Polycrystal
复制标题
孔隙率对四方氧化锆多晶摩擦磨损的影响
DOI：
10.1111/j.1151-2916.1997.tb02841.x
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
P. V. D. Varst
中科院分区：
文献类型：
--
作者：
Y. He;L. Winnubst;A. Burggraaf;H. Verweij;P. V. D. Varst
研究了孔隙率为1.5%~ 7%的超细晶（180 nm）钇掺杂四氧化锆（Y-TZP）陶瓷的滑动磨损性能。在干N2条件下的销-板摩擦计上，例如，通过将孔隙率增加5倍（从1.5到7.0体积%），材料的磨损率增加5倍。在所有情况下，没有（不可逆的）相变单斜氧化锆发生在磨损试验。相对致密的纳米结构材料的结果显示出明显的塑性变形和较少的微裂纹形成的证据。这些陶瓷的磨损痕迹的形态表明，在接触表面上的微裂纹的程度和数量增加的孔隙率。观察到磨损机制的变化。
Sliding wear properties of ultra-fine-grained (180 nm) yttria-doped tetragonal zirconia (Y-TZP) ceramics were examined with porosities from 1.5% to 7%. On a pin-on-plate tribometer under dry-N2 conditions, e.g., wear rates of the material increase by a factor of 5 by increasing porosity with a factor of 5 (from 1.5 to 7.0 vol%). In all cases no (irreversible) phase transformation to monoclinic zirconia took place during wear tests. The results for the relatively dense nanostructured materials showed significant evidence of plastic deformation and less microcrack formation. The morphology of the wear tracks in these ceramics indicate that the degree and amount of microcracks on the contact surface increased with porosity. A change in wear mechanism is observed.