| Ho_2O_3掺杂对原位合成HoAl-Al_2O_3/TiAl复合材料显微组织及性能的影响 |
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| 引用本文： | 许红娅,王芬,解宇星,朱建锋.Ho_2O_3掺杂对原位合成HoAl-Al_2O_3/TiAl复合材料显微组织及性能的影响[J].航空材料学报,2009,29(6):85-88. |
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| 作者姓名： | 许红娅 王芬 解宇星 朱建锋 |
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| 作者单位： | 1. 陕西科技大学,材料科学与工程学院,西安,710021
2. 中国航天科技集团第六研究院,西安,710077 |
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| 基金项目： | 国家自然科学基金资助项目，陕西科技大学研究生创新基金 |
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| 摘 要： | 采用固态置换反应原位合成工艺，利用Al—Ti—TiO2-Ho2O3体系的放热反应合成了HoAl-Al2O3／TiAl复合材料。利用XRD和SEM分析了Ho2O3掺：枭对原位合成HoAl，Al2O3颗粒强化钛铝基复合材料显微组织的影响，探讨了稀土氧化物（Ho2O3）的细化机制。测试了力学性能。结果表明：Al—Ti—TiO2-Ho2O3系原位合成的HoAl-Al2O3／TiAl复合材料由TiAl，Ti3Al，Al2O3以及HoAl相组成；HoAl金属间化合物弥散分布于基体晶粒和Al2O3颗粒交界处，限制颗粒长大，细化基体晶粒与Al2O3，颗粒，同时提高了HoAl，Al2O3颗粒在基体中的分散度；Ho2O3的引入改善了复合材料的力学性能。
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| 关 键 词： | Ho2O3掺杂 HoAl-Al2O3／TiAl复合材料 微观形貌 力学性能 |
Effect of Ho_2O_3 Doped on Micro-Structures and Properties of In-Situ HoAl-Al_2O_3/TiAl Composites |
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| XU Hong-ya,WANG Fen,XIE Yu-xing,ZHU Jian-feng.Effect of Ho_2O_3 Doped on Micro-Structures and Properties of In-Situ HoAl-Al_2O_3/TiAl Composites[J].Journal of Aeronautical Materials,2009,29(6):85-88. |
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| Authors: | XU Hong-ya WANG Fen XIE Yu-xing ZHU Jian-feng |
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| Abstract: | HoAl-Al_2O_3/Ti aluminide composites reinforced by Ho_2O_3 were prepared by in-situ hot-pressing method with the exothermic reaction of Al, Ti, TiO_2 and Ho_2O_3 powder. The effect of Ho_2O_3 doping on the microstructures was analyzed by XRD, SEM. Bending strength and fracture toughness properties were tested. The refinement mechanism of rare-earth oxide was investigated as well. The results show the phases of the composites are composed of TiAl, Ti3Al, Al_2O_3 and HoAl. The HoAl particles distributed at grain boundary of the matrix and Al_2O_3 particles. At the same time, it restricted particle size and increased particle dissemination of the HoAl, Al_2O_3. The mechanical property of composites reinforced by Ho_2O_3 were increased. |
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| Keywords: | doping Ho_2O_3 HoAl-Al2O3/TiAl composite microstructure mechanical property |
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