Grain size effect on cyclic oxidation of (TiB2+TiC)/Ni3Al composites

被引：17

作者：

Cao Guo-jian ^{[1
]}

Xu Hong-yu ^{[2
]}

Zheng Zhen-zhu ^{[2
]}

Geng Lin ^{[2
]}

Masaaki, Naka ^{[3
]}

机构：

[1] Harbin Univ Sci & Technol, Sch Mat Sci & Engn, Harbin 150040, Peoples R China

[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[3] Osaka Univ, Joining & Welding Res Inst, Osaka 5670047, Japan

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2012年 / 22卷 / 07期

关键词：

nickel aluminides; composites; grain refinement; oxidation; mechanical alloying; PHASE-STABILITY; TIO2; B; NANOCRYSTALLINE; RESISTANCE; BEHAVIOR;

D O I：

10.1016/S1003-6326(11)61360-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

(TiB2+TiC)/Ni3Al composites were prepared by mechanical alloying of elemental powders and subsequently spark plasma sintering. Microstructure of (TiB2+TiC)/Ni3Al composite sintered at 950 degrees C was finer than that of composite sintered at 1050 degrees C. The influence of grain size on cyclic oxidation behavior was investigated. Cyclic oxidation results showed that the composite sintered at 950 degrees C had smaller mass gains than the composite sintered at 1050 degrees C. XRD and EDS results indicate that finer grain size is beneficial for increasing the oxidation resistance by improving the formation of a continuous TiO2 outer layer and a continuous Al2O3 inner layer on the surface of the composites sintered at 950 degrees C.

引用

页码：1588 / 1593

页数：6

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