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材料研究学报  2010, Vol. 24 Issue (6): 585-591    
  研究论文 本期目录 | 过刊浏览 |
NiAl--28Cr--5.94Mo--0.05Hf--0.01Ho定向共晶合金的高温氧化行为
王振生1,2,  周兰章2,  郭建亭2, 梁永纯2, 胡壮麒2
1.湖南科技大学 机电工程学院 湘潭 411201
2.中国科学院金属研究所 沈阳 110016
High Temperature Oxidation Behavior of Directional Solidification NiAl–28Cr–5.94Mo–0.05Hf–0.01Ho Eutectic Alloy
WANG Zhensheng1,2,  ZHOU Lanzhang2,  GUO Jianting2,  LIANG Yongchun2,  HU Zhuangqi2
1.School of Electromechanical Engineering, Hunan University of Science and Technology, Xiangtan 411201
2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
引用本文:

王振生 周兰章 郭建亭 梁永纯 胡壮麒. NiAl--28Cr--5.94Mo--0.05Hf--0.01Ho定向共晶合金的高温氧化行为[J]. 材料研究学报, 2010, 24(6): 585-591.
. High Temperature Oxidation Behavior of Directional Solidification NiAl–28Cr–5.94Mo–0.05Hf–0.01Ho Eutectic Alloy[J]. Chin J Mater Res, 2010, 24(6): 585-591.

全文: PDF(1053 KB)  
摘要: 在900--1150℃氧化的NiAl--28Cr--5.94Mo--0.05Hf--0.01Ho定向共晶合金, 在其表面生成了连续的Al2O3氧化膜, 具有良好的抗氧化性能。定向凝固工艺使合金的组织细化并提高了Cr(Mo)相中Al元素的含量, 以及加入微量稀土元素Ho, 都有利于生成Al2O3氧化膜。在NiAl--28Cr--5.94Mo--0.05Hf--0.01Ho定向共晶合金的氧化过程中表面氧化膜发生相变θ--Al2O3→α-Al2O3,导致其1000℃氧化质量增加出现反常。
关键词 金属材料金属间化合物NiAl高温氧化定向共晶合金    
Abstract:The isothermal oxidation behavior of NiAl–28Cr–5.94Mo–0.05Hf–0.01Ho directional eutectic alloy in the temperature range of 900–1150  was investigated. The results revealed that a continuous Al2O3 scale was formed and owned excellent oxidation resistance. Trace rare earth element Ho distributed uniformly at the alloy, together with refining structure and relatively high content of Al of Cr(Mo) phase by directional solidification (DS) process are beneficial to the formation of continuous Al2O3 coatings. During the oxidation of NiAl–28Cr–5.94Mo–0.05Hf–0.01Ho directional eutectic alloy, a phase transformation from θ–Al2O3 to α–Al2O3 was found on the surface of oxidation film, and it resulted in the abnormal oxidation mass gaining when the alloy oxided at 1000oC.
Key wordsmetallic materials     intermetallic compounds     NiAl     high temperature oxidation    directional eutectic alloy
收稿日期: 2010-04-01     
ZTFLH: 

TGl46

 
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