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High vacuum arc ion plating NiCrAlY coatings: Bias effect and approach to preparation of functional gradient coatings
Zhao, Panpan; Shen, Mingli; Gu, Yan; Zhu, Shenglong; Wang, Fuhui; mlshen@imr.ac.cn
2015
Source PublicationSURFACE & COATINGS TECHNOLOGY
ISSN0257-8972
Volume281Pages:44-50
AbstractThe substrate bias effects on high vacuum arc ion plating (HV-AIP) of NiCrAlY coatings on superalloy were investigated at the vacuum level of 10(-3)-10(-4)Pa, which are 2-3 orders in magnitude better than that of conventional low vacuum arc ion plating (LV-AIP). The negative bias applied to the substrate was in the range of -50 V to -450 V. Microstructures, deposition rates, and chemical compositions of the coatings are significantly influenced by the negative bias. Except for commonly observed bias induced densification in microstructure and decrease in deposition rate, strong preferential sputtering effect at high bias was observed. The sputtering yield for Cr was estimated to be ranged from similar to 0.1 to similar to 0.2 at bias from -50 V to -450 V, while those for Ni and Al were from similar to 0.1 to 1.5. As a result, the major phase constitution of the coatings changed from gamma-Ni/y'-Ni3Al phases at bias of-SO V to alpha-Cr phase at bias of -450 V. Such stronger preferential sputtering effect in HV-AIP fosters a strategy for preparing compositionally gradient NiCrAlY coatings just by control of the substrate bias without the need of further treatments or multi-targets. Based on this concept, preparation of several types of gradient NiCrAlY coatings with great flexibilities by one target and one process was demonstrated. (C) 2015 Elsevier B.V. All rights reserved.
description.department[zhao, panpan ; shen, mingli ; gu, yan ; zhu, shenglong ; wang, fuhui] chinese acad sci, inst met res, shenyang 110016, peoples r china
KeywordHigh Vacuum Arc Ion Plating Mcraly Coatings Bias Sputtering Gradient Coating
Funding OrganizationNational key Basic Research Program of China (973 Program) [2012CB625100]; National High-tech Research and Development Program (863 Program) [2012AA03A512]; National Natural Science Foundation of China [51301185]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74887
Collection中国科学院金属研究所
Corresponding Authormlshen@imr.ac.cn
Recommended Citation
GB/T 7714
Zhao, Panpan,Shen, Mingli,Gu, Yan,et al. High vacuum arc ion plating NiCrAlY coatings: Bias effect and approach to preparation of functional gradient coatings[J]. SURFACE & COATINGS TECHNOLOGY,2015,281:44-50.
APA Zhao, Panpan,Shen, Mingli,Gu, Yan,Zhu, Shenglong,Wang, Fuhui,&mlshen@imr.ac.cn.(2015).High vacuum arc ion plating NiCrAlY coatings: Bias effect and approach to preparation of functional gradient coatings.SURFACE & COATINGS TECHNOLOGY,281,44-50.
MLA Zhao, Panpan,et al."High vacuum arc ion plating NiCrAlY coatings: Bias effect and approach to preparation of functional gradient coatings".SURFACE & COATINGS TECHNOLOGY 281(2015):44-50.
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