| Er掺杂强韧化Al_2O_3/TiAl复合材料 |
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| 引用本文： | 王芬,王晓凤,朱建锋,向六一,李栋.Er掺杂强韧化Al_2O_3/TiAl复合材料[J].材料热处理学报,2011,32(6). |
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| 作者姓名： | 王芬 王晓凤 朱建锋 向六一 李栋 |
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| 作者单位： | 教育部轻化工助剂化学与技术重点实验室,陕西科技大学材料科学与工程学院,陕西西安710021 |
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| 基金项目： | 国家自然科学基金(51072109); 陕西科技大学科研基金(BJ08-14) |
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| 摘 要： | 以Ti、Al、TiO2为起始原料,以Er2O3为掺杂剂,原位热压合成了Er掺杂Al2O3/TiAl复合材料。通过XRD、SEM分析及力学性能测试,研究了不同Er2O3引入量对合成Al2O3/TiAl复合材料微观结构和力学性能的影响。结果表明:复合材料主要由TiAl、Ti3 Al、Al2 O3相和少量Al10 Er6 O24相组成,含Er相主要分布在基体相晶界处;掺杂0.01 mol Er2 O3制得的复合材料,经1250℃保温2 h真空热压烧结后表观断裂韧性达到最大值(10.41 MPa.m1/2),经1300℃保温2 h真空热压烧结后弯曲强度达到最大值(456.06 MPa);当Er2O3掺杂量增加到0.02 mol时,复合材料的弯曲强度和表观断裂韧性均呈减小趋势。微观结构分析表明,掺杂0.01 mol Er2O3的复合材料断口毛糙,颗粒尺寸变小,增强相分布较均匀,表明适量的Er2O3掺杂可细化复合材料晶粒尺寸,提高增强颗粒分布均匀度,起到增强增韧的效果。
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| 关 键 词： | Er2O3掺杂 Al2O3/TiAl复合材料 原位热压烧结 力学性能 |
Reinforcing and toughening of Al_2O_3/TiAl composites by doping Er |
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| WANG Fen,WANG Xiao-feng,ZHU Jian-feng,XIANG Liu-yi,LI Dong.Reinforcing and toughening of Al_2O_3/TiAl composites by doping Er[J].Transactions of Materials and Heat Treatment,2011,32(6). |
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| Authors: | WANG Fen WANG Xiao-feng ZHU Jian-feng XIANG Liu-yi LI Dong |
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| Affiliation: | WANG Fen,WANG Xiao-feng,ZHU Jian-feng,XIANG Liu-yi,LI Dong(Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry,Ministry of Education,School of Materials Science and Engineering Shaanxi University of Science and Technology,Xi'an 710021,China) |
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| Abstract: | Al2O3/TiAl composites doped with Er were successfully prepared from the powder mixture of Ti,Al,TiO2 and Er2O3 by hot pressing reaction synthesis technique.The phase compositions,room-temperature hardness and apparent fracture toughness of the composites were studied.The results show that the phases of the composites consist of TiAl,Ti3Al,Al2O3 and a small amount of Al10Er6O24.The phase containing Er and Al2O3 particles are distributed at grain boundary of the matrix.Flexural strength of the composites with... |
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| Keywords: | Er2O3 addition Al2O3/TiAl composites in situ and hot press mechanical property |
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