Effects of tantalum content on strengthening phase and high temperature oxidation behavior of Co-Al-W superalloy

	Effects of tantalum content on strengthening phase and high temperature oxidation behavior of Co-Al-W superalloy
	Xu, Yang-Tao1,2 ; Sha, Qi-Zhen 1,2; Xia, Tian-Dong1,2
	2016-02-01
发表期刊	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
ISSN	10040609
卷号	26 期号:2 页码:302-309
摘要	With the precipitation strengthening phase of ternary compound γ′-Co3(Al, W), Co-Al-W superalloy is a novel cobalt-based superalloy. In order to study the effects of alloying element tantalum on the strengthening phase and high temperature oxidation behavior of Co-8.8Al-9.8W superalloy, the phase composition, the amount of strengthening phase and precipitation behavior of μ phase of Co-8.8Al-9.8W superalloy with different tantalum contents were investigated with d electrons alloy design theory and XRD analysis. Then the composition, microstructure and element distribution of the high temperature oxide films of Co-8.8Al-9.8W superalloy with different tantalum contents were studied by SEM and EDAX methods. And the activation energy of Co-8.8Al-9.8W superalloy with different tantalum content was calculated. The results show that with tantalum content increasing, the number of γ′ strengthening phase of the Co-Al-W superalloy increases and the μ phase separation is inhibited. The oxide film of Co-8.8Al-9.8W-xTa (x=0, 0.5, 1, 1.5, 2) superalloy mainly consists of three layers, the outermost layer mainly is cobalt oxide, the intermediate layer is tungsten, aluminum and tantalum complex oxides, and the inner layer is made up of aluminum oxide. Tantalum element improves the density and stability of oxide film of aluminum oxide. The oxide film of 1.5Ta superalloy has the best compactness and stability, and the 1.5Ta superalloy has the highest oxidation activation energy and the strongest antioxidant capacity. © 2016, Central South University of Technology. All right reserved.
关键词	Activation energy Alloying elements Alumina Aluminum oxide Cobalt alloys Cobalt compounds Oxide films Phase separation Precipitation (chemical) Superalloys Tantalum Tantalum alloys Tantalum oxides Ternary alloys Thermooxidation Alloy design theory Antioxidant capacity Cobalt-based superalloy Element distribution High temperature oxidation Behavior Oxidation activation energy Precipitation behavior Precipitation strengthening
收录类别	EI
语种	中文
出版者	Central South University of Technology
EI入藏号	20161302154538
EI主题词	Aluminum alloys
EI分类号	531 Metallurgy and Metallography - 541.1 Aluminum - 541.2 Aluminum Alloys - 543.4 Tantalum and Alloys - 543.5 Tungsten and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds
来源库	Compendex
分类代码	531 Metallurgy and Metallography - 531.1 Metallurgy - 541.2 Aluminum Alloys - 543.4 Tantalum and Alloys - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 802.2 Chemical Reactions - 802.3 Chemical Operations - 804 Chemical Products Generally - 804.2 Inorganic Compounds
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/112503
专题	材料科学与工程学院兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metal, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
第一作者单位	兰州理工大学; 材料科学与工程学院
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Xu, Yang-Tao,Sha, Qi-Zhen,Xia, Tian-Dong. Effects of tantalum content on strengthening phase and high temperature oxidation behavior of Co-Al-W superalloy[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2016,26(2):302-309.
APA	Xu, Yang-Tao,Sha, Qi-Zhen,&Xia, Tian-Dong.(2016).Effects of tantalum content on strengthening phase and high temperature oxidation behavior of Co-Al-W superalloy.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,26(2),302-309.
MLA	Xu, Yang-Tao,et al."Effects of tantalum content on strengthening phase and high temperature oxidation behavior of Co-Al-W superalloy".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 26.2(2016):302-309.