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Influence of Cr addition on the interface purification of vacuum brazed NiCr-Cr3C2 coatings on single crystal superalloy
Wang, D.; Wang, W. Q.; Chen, X. G.; Chi, C. T.; Wang, M. S.; Han, X.; Xie, Y. J.; Xie, YJ (reprint author), Jiangxi Acad Sci, Inst Appl Phys, Nanchang 330029, Jiangxi, Peoples R China.; Xie, YJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
2017-09-25
Source PublicationELSEVIER SCIENCE SA
ISSN0257-8972
Volume325Pages:200-209
AbstractIn order to improve the high temperature wear- and oxidation resistance of single crystal superalloy, NiCr-Cr3C2 coatings were vacuum brazed on the surface. Different weight ratios of Cr were added into the coatings to control the diffusion of Si and C into the base metal, which would be harmful to the base metal stability. The results show that, when no Cr was added into the coatings, a layer of Ni3Si phase at the interface and MC precipitates in base metal were produced. With the increase of the Cr addition, the coating/base metal interface was gradually purified. The Ni3Si layer and the MC precipitates disappeared when the Cr addition increased to 30 wt% and an interface was clearly presented with the 'gamma' phases on both sides epitaxially growing on some extent. After 200 thermal fatigue cycles, the total crack lengths were measured, which decreased with increasing Cr addition, indicating that the thermal fatigue resistance was improved. (C) 2017 Elsevier B.V. All rights reserved.; In order to improve the high temperature wear- and oxidation resistance of single crystal superalloy, NiCr-Cr3C2 coatings were vacuum brazed on the surface. Different weight ratios of Cr were added into the coatings to control the diffusion of Si and C into the base metal, which would be harmful to the base metal stability. The results show that, when no Cr was added into the coatings, a layer of Ni3Si phase at the interface and MC precipitates in base metal were produced. With the increase of the Cr addition, the coating/base metal interface was gradually purified. The Ni3Si layer and the MC precipitates disappeared when the Cr addition increased to 30 wt% and an interface was clearly presented with the 'gamma' phases on both sides epitaxially growing on some extent. After 200 thermal fatigue cycles, the total crack lengths were measured, which decreased with increasing Cr addition, indicating that the thermal fatigue resistance was improved. (C) 2017 Elsevier B.V. All rights reserved.
description.department[wang, d. ; chen, x. g. ; xie, y. j.] jiangxi acad sci, inst appl phys, nanchang 330029, jiangxi, peoples r china ; [wang, w. q.] nanchang univ, sch mech & elect engn, nanchang 330031, jiangxi, peoples r china ; [chi, c. t. ; wang, m. s. ; han, x. ; xie, y. j.] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china
KeywordVacuum Brazecoating Single Crystal Superalloy Interface Purification Thermal Fatigue Cycling Nicr-cr3c2 Coating
Subject AreaMaterials Science, Coatings & Films ; Physics, Applied
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/79085
Collection中国科学院金属研究所
Corresponding AuthorXie, YJ (reprint author), Jiangxi Acad Sci, Inst Appl Phys, Nanchang 330029, Jiangxi, Peoples R China.; Xie, YJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.
Recommended Citation
GB/T 7714
Wang, D.,Wang, W. Q.,Chen, X. G.,et al. Influence of Cr addition on the interface purification of vacuum brazed NiCr-Cr3C2 coatings on single crystal superalloy[J]. ELSEVIER SCIENCE SA,2017,325:200-209.
APA Wang, D..,Wang, W. Q..,Chen, X. G..,Chi, C. T..,Wang, M. S..,...&Xie, YJ .(2017).Influence of Cr addition on the interface purification of vacuum brazed NiCr-Cr3C2 coatings on single crystal superalloy.ELSEVIER SCIENCE SA,325,200-209.
MLA Wang, D.,et al."Influence of Cr addition on the interface purification of vacuum brazed NiCr-Cr3C2 coatings on single crystal superalloy".ELSEVIER SCIENCE SA 325(2017):200-209.
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