中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Effect of Ta on microstructural evolution of NiCrAlYSi coated Ni-base single crystal superalloys

文献类型:期刊论文

作者Yin, Bin1,2; Xie, Guang1; Lou, Langhong1; Zhang, Jian1
刊名JOURNAL OF ALLOYS AND COMPOUNDS
出版日期2020-07-15
卷号829页码:14
ISSN号0925-8388
关键词Single crystal superalloys NiCrAlYSi coating Ta Secondary reaction zone (SRZ) Rafting
DOI10.1016/j.jallcom.2020.154440
通讯作者Xie, Guang(gxie@imr.ac.cn)
英文摘要The effect of Ta on microstructural evolution of NiCrAlYSi coated Ni-base single crystal superalloys at 1000 degrees C and 1100 degrees C has been investigated. Interdiffusion occurs between the NiCrAlYSi coating and the substrate, leading to the formation of inter-diffusion zone (IDZ) and secondary reaction zone (SRZ). After exposure at 1000 degrees C for 100 h, the initial gamma/gamma' transforms to gamma' phases in the IDZ, and SRZ with sigma and mu topologically close-packed (TCP) phases is formed primarily due to the inward diffusion of Al. Different behavior of SRZ formation in the alloys with various Ta content can be observed after exposure at 1000 degrees C, which highlights the potency of Ta addition in promoting SRZ formation. This may be ascribed to the fact that Ta promotes the precipitation of TCP phases. After exposure at 1100 degrees C for 100 h, the initial gamma/gamma' transforms to y layer and coarse gamma' phases in the IDZ, and no SRZ can be found. The formation of IDZ is significantly suppressed by Ta addition, which may be related to the retardation of interdiffusion between the coating and the substrate due to the increased gamma' volume fraction. Furthermore, gamma' rafting parallel to and/or perpendicular to the coating/substrate interface in the substrate beneath IDZ are found in the alloys after exposure at 1000 degrees C and 1100 degrees C. Microstructural observation shows that Ta has a potent influence on the development of perpendicular gamma' rafting. The mechanism of parallel gamma' rafting and perpendicular gamma' rafting has been discussed, respectively. (C) 2020 Elsevier B.V. All rights reserved.
资助项目National Natural Science Foundation of China[51771204] ; National Natural Science Foundation of China[U1732131] ; National Natural Science Foundation of China[51631008] ; National Natural Science Foundation of China[91860201] ; National Natural Science Foundation of China[51911530154]
WOS研究方向Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
出版者ELSEVIER SCIENCE SA
WOS记录号WOS:000523555300039
资助机构National Natural Science Foundation of China
源URL[http://ir.imr.ac.cn/handle/321006/137994]  
专题金属研究所_中国科学院金属研究所
通讯作者Xie, Guang
作者单位1.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式
GB/T 7714
Yin, Bin,Xie, Guang,Lou, Langhong,et al. Effect of Ta on microstructural evolution of NiCrAlYSi coated Ni-base single crystal superalloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,829:14.
APA Yin, Bin,Xie, Guang,Lou, Langhong,&Zhang, Jian.(2020).Effect of Ta on microstructural evolution of NiCrAlYSi coated Ni-base single crystal superalloys.JOURNAL OF ALLOYS AND COMPOUNDS,829,14.
MLA Yin, Bin,et al."Effect of Ta on microstructural evolution of NiCrAlYSi coated Ni-base single crystal superalloys".JOURNAL OF ALLOYS AND COMPOUNDS 829(2020):14.

入库方式: OAI收割

来源:金属研究所

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