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| Al2O3/ZrO2(Y2O3)复合材料断裂过程中的相变及力学性能 | |
| 引用本文： | 马伟民,修稚萌,毕孝国,闻雷,孙旭东.Al2O3/ZrO2(Y2O3)复合材料断裂过程中的相变及力学性能[J].金属学报,2005,41(1):93-98. |
| 作者姓名： | 马伟民 修稚萌 毕孝国 闻雷 孙旭东 |
| 作者单位： | 1. 东北大学材料与冶金学院材料电磁过程教育部重点实验室,沈阳,110004;沈阳大学基础部,沈阳,110044 2. 东北大学材料与冶金学院材料电磁过程教育部重点实验室,沈阳,110004 3. 北京大学化学与分子工程学院,北京,100081 |
| 基金项目： | 国家自然科学基金资助项目50172010 |
| 摘 要： | 用真空烧结方法制备了Al2O3/ZrO2(Y2O3)复合材料,分析了ZrO2(3Y)和ZrO2(2Y)含量对Al2O3基陶瓷抗弯强度、断裂韧性的影响.用XRD定量分析了含摩尔分数2%与3%Y2O3的ZrO2(2Y)与ZrO2(BY)在断裂过程中四方相转变成单斜相的相变量,用以阐明增韧机制.结果表明,在ZrO2含量为15%(体积分数)时,Al2O3/ZrO2(3Y)和Al2O3/ZrO2(2Y)复合材料的抗弯强度、断裂韧性分别达到825MPa,7.8MPa·m1/2和738MPa,6.7MPa·m1/2,两者的性能差异主要来自不同的增韧机制. |
| 关 键 词： | Al2O3／ZrO2复合材料 真空烧结 相变增韧 力学性能 |
| 文章编号： | 0412-1961(2005)01-0093-06 |
| 收稿时间： | 2004-02-19 |
| 修稿时间： | 2004-06-25 |
Phase Transformation and Machnical Properties of Al2O3/ZrO2(Y2O3) Composites During Fracturing |
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| MA Weimin,XIU Zhimeng,BIXiaoguo,WEN Lei,SUN Xudong.Phase Transformation and Machnical Properties of Al2O3/ZrO2(Y2O3) Composites During Fracturing[J].Acta Metallurgica Sinica,2005,41(1):93-98. | |
| Authors: | MA Weimin XIU Zhimeng BIXiaoguo WEN Lei SUN Xudong |
| Affiliation: | Key Laboratory of National Education Ministry for Electromagnetism Processing of Materials, College of Materials and Metallurgy, Northeastern University, Shenyang 110004 |
| Abstract: | The effect of the contents of ZrO2(3Y) and ZrO2(2Y) on the mechanical properties of the Al2O3/ZrO3(Y2O3) composites prepared by vacuum sintering has been studied. The change of m--ZrO2 and t-ZrO2 contents before and after fracture was detarmined by X-ray diffraction phase analysis, which is related to the toughening mechanism. When the content of ZrO2 is 15% (volume frection), the bending strength and fracture toughness of Al2O3/ZrO2(2Y) composite are 738 MPa and 6.7 MPa.m1/2, respectively, while those of the Al2O3/ZrO2(3Y) composite are 825 MPa and 7.8 MPa.m1/2, respectively. The difference in mechanical properties is due to the operation of different toughening mechanisms. |
| Keywords: | Al2O3/ZrO2(Y2O3) composite vacuum sintering trnsformation toughening mechanical property |
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