Ho2O3掺杂对原位合成HoAl-Al2O3/TiAl复合材料显微组织及性能的影响

许红娅;王芬;解宇星;朱建锋

航空材料学报 ›› 2009, Vol. 29 ›› Issue (6) : 85-88.

PDF(342 KB)
PDF(342 KB)
航空材料学报 ›› 2009, Vol. 29 ›› Issue (6) : 85-88.
论文

Ho2O3掺杂对原位合成HoAl-Al2O3/TiAl复合材料显微组织及性能的影响

作者信息 +

Effect of Ho2O3 Doped on Micro-Structures and Properties of In-Situ HoAl-Al2O3/TiAl Composites

Author information +
文章历史 +

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掺杂对原位合成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。

Abstract

HoAl-Al2O3/Ti aluminide composites reinforced by Ho2O3 were prepared by in-situ hot-pressing method with the exothermic reaction of Al,Ti,TiO2 and Ho2O3 powder.The effect of Ho2O3 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,Al2O3 and HoAl.The HoAl particles distributed at grain boundary of the matrix and Al2O3 particles.At the same time,it restricted particle size and increased particle dissemination of the HoAl,Al2O3.The mechanical property of composites reinforced by Ho2O3 were increased.

关键词

Ho2O3掺杂 / HoAl-Al2O3/TiAl复合 / 微观形貌 / 力学性能

Key words

doping Ho2O3 / HoAl-Al2O3/TiAl comp / microstructure / mechanical property

引用本文

导出引用
许红娅, 王芬, 解宇星, 朱建锋. Ho2O3掺杂对原位合成HoAl-Al2O3/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
XU Hong-ya, WANG Fen, XIE Yu-xing, ZHU Jian-feng. Effect of Ho2O3 Doped on Micro-Structures and Properties of In-Situ HoAl-Al2O3/TiAl Composites[J]. Journal of Aeronautical Materials, 2009, 29(6): 85-88

参考文献

KIM Y W.Wrought TiAl alloy design[J].Trans Nonferrous Met Soc China,1999,9:298.
LORIA Edward A.Gamma titanium aluminides as prospective structural materials[J].Intermetallics,2000,8(9-11):1339.
KIM Y W.Ordered intermetallic alloys,part III:gamma titanium aluminides[J].JOM,1994,46(7):30.
孔凡涛,陈玉勇,田竞,等.钇对Ti-43Al-9V合金组织性能的影响[J].稀有金属,2004,28(1):75.
KATTNER U R,LIN J C,CHANG Y A.Thermodynamic assessment and calculation of the Ti-Al system[J].Physical Metallurgy and Materials Science (A),1999,23 (8):2081-2090.
孙伟成,张淑荣,侯爱芹,等.稀土在铝合金中的行为[M].北京:兵器工业出版社,1992.
LI Z Q,HAN JC,HE X D,et al.Preparation of TiAl/Al2O3 composites by combustion synthesis[J].Journal of Harbin Institute of Technology,2002,9(2):213-216.
WHITEHOUSE A F,CLYNE T W.Effects of reinforcement content and shape on cavitation and failure in metal-matrix composites[J].Composites,1993,24(3):256-261.
杨滨,王锋,段先进,等.熔铸-原位反应喷射成形7075/TiC复合材料的拉伸性能[J].金属学报,2001,37(3):311-314.
张永刚,韩雅方,陈国良,等.金属间化合物结构材料[M].北京:国防工业出版社,2001:314-317.
中山大学金属系.稀土物理化学常数[M].北京:冶金工业出版社,1978.125.
孙伟成,张淑荣,侯爱芹,等.稀土在铝合金中的行为[M].北京:兵器工业出版社,1992.98.

基金

国家自然科学基金资助项目(50672056);陕西科技大学研究生创新基金资助
PDF(342 KB)

15

Accesses

0

Citation

Detail

段落导航
相关文章

/