Y-TZP/Al2O3纳米复合陶瓷的压痕尺寸效应
Indentation Size Effect of Y-TZP/2O3 Nano Composite Ceramics
摘 要
通过控制初始粉体的晶粒尺寸和成型素坯的烧结条件, 制备出了晶粒尺寸在100~500 nm范围的Y-TZP/Al2O3纳米陶瓷复合材料; 采用扫描电镜、X射线衍射仪分析了其显微结构和物相组成, 并用压痕法测定了显微硬度。结果表明: 该复合陶瓷主要由t-ZrO2相组成, 同时含有少量α-Al2O3; 其显微硬度存在显著的压痕尺寸效应, 且硬度与晶粒尺寸的平方根成反比。
纳米陶瓷
压痕尺寸效应
Y-TZP/Al2O3 composite ceramic
nano ceramic
indentation size effect
Abstract
By controlling the initial grain size of powders and sintering conditions of the green body, Y-TZP/Al2O3 nano composite ceramics with grain size of 100-500 nm were prepared. The microstructure and phase composition were analyzed by means of scanning electron microscopy and X-ray diffraction. Using indentation method the micro-hardness of the ceramics with different grain sizes was evaluated. The results show that the ceramics were composed of t-ZrO2 with little α-Al2O3 phase. The micro-hardness of the ceramics had obvious indentation size effect, and the hardness was inversely proportional to the square root of grain size.
中图分类号 TQ174.75
所属栏目
基金项目 国家自然科学基金资助项目(50902132); 中国科学院“西部之光”人才培养计划资助项目(2010)
收稿日期 2010/3/22
修改稿日期 2011/1/6
网络出版日期
作者单位点击查看
备注张永胜(1977-), 男, 甘肃通渭人, 副研究员,博士。
引用该论文: ZHANG Yong-sheng,HU Li-tian. Indentation Size Effect of Y-TZP/2O3 Nano Composite Ceramics[J]. Materials for mechancial engineering, 2011, 35(4): 95～97
张永胜,胡丽天. Y-TZP/Al2O3纳米复合陶瓷的压痕尺寸效应[J]. 机械工程材料, 2011, 35(4): 95～97
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【8】LIU Y, NGAN A H W. Depth dependence of hardness in copper single crystals measured by nanoindentation[J].Scr Mater,2001,44:237-241.
【9】SWADENER J G, MISRA A, HOAGLAND R G,et al. A mechanistic description of combined hardening and size effects[J].Scr Mater,2002,47:343-348.
【10】FENG G, WILLIAM D N. Indentation size effect in MgO[J].Scr Mater,2004,51:599-603.
【11】张永胜,胡丽天,袁双灵,等.不同Al2O3含量ZrO2(3Y)/Al2O3纳米复合粉体的制备与表征[J].机械工程材料,2006,30(7):74-78.
【12】周亮,姚英学,刘琦.基于能量平衡方法的压痕尺寸效应分析[J].硅酸盐学报,2007,35(3):1478-1483.
【13】LI H, BRADT R C. The microhardness indentation load/size effect in rutile and cassiterite single crystals[J].J Mater Sci,1993,28:917-926.
【14】QUINN J B, QUINN G D. Indentation brittleness of cera-mics: a fresh approach[J].J Mater Sci,1997,32:4331-4346.
【15】WAN Y, GONG J H. Influence of TiC particle size on the load-independent hardness of Al2O3-TiC composites[J].Mater Lett,2003,57:3439-3443.
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