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Comparative Study of Thermal Shock Behavior of the Arc Ion Plating NiCrAlY and the Enamel Based Composite Coatings
Feng Min1; Chen Minghui2; Yu Zhongdi2; Lv Zhenbo1; Zhu Shenglong3; Wang Fuhui2
Corresponding AuthorChen Minghui(mhchen@mail.neu.edu.cn)
2017-12-11
Source PublicationACTA METALLURGICA SINICA
ISSN0412-1961
Volume53Issue:12Pages:1636-1644
AbstractFrom the view of material point, high-temperature protective coatings are divided into the following two categories: ceramic coating and metallic coating. Metallic coating possesses higher toughness and bond strength to the alloy substrate than ceramic coating does. Its protectiveness relies on the formation of a slow-growing and adherent oxide scale at high temperatures. However, with increasing the oxidation time, the oxide scale will experience cracking and spalling as it has grown to the critical thickness. Ceramic coating due to its chemical inertness has been used in many corrosive environments for protection. But the weak interfacial bond and big mismatch of coefficient of thermal expansion with the alloy substrate limit its application in thermal shock environments. Since glass-ceramics combine the generally superior properties of crystallite ceramics with the easy processing of glasses, it is expected that glass-ceramic coating should show a higher spallation resistance than ceramic one under thermal shock. Cast K444 superalloy is widely used in advanced aircraft engine and gas turbine. Its protection from hightemperature oxidation under thermal shock becomes a critic issue. In this work, NiCrAlY and enamel based composite coatings on the K444 superalloy substrate by arc ion plating and spray-firing methods were prepared, respectively. Thermal shock behavior from 900 degrees C to room temperature of these two coatings was studied comparatively. One cycle of thermal shock contained the holding of samples at 900 degrees C for 1.5 h and the following cooling down in air or water. Results indicated that thermal shock resistance of the NiCrAlY coating was low. As the NiCrAlY coating was thermal shocked by water, its oxide scale cracked severely after 30 cyc, and certain crack had already transported the scale and penetrated into the interior of the underlying metallic coating; for the enamel based composite coating, however, its thermal shock resistance was high. No cracks were detected at the coating surface or interior after thermal shock test. Besides, the enamel coating still adhered well with the alloy substrate. The high resistance to thermal shock of the enamel based composite coating originated from: (1) the coefficient of thermal expansion of the enamel based composite coating matched well with that of the alloy substrate; (2) the addition of nano-sized Ni and NiCrAlY metallic particles improved the toughness of the enamel coating, in addition to enhancing its coefficient of thermal expansion.
KeywordNiCrAlY coating enamel coating thermal shock superalloy
Funding OrganizationNational Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
DOI10.11900/0412.1961.2017.00192
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51471177] ; Fundamental Research Funds for the Central Universities[N160205001]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000416301600010
PublisherSCIENCE PRESS
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/125488
Collection中国科学院金属研究所
Corresponding AuthorChen Minghui
Affiliation1.Liaoning Shihua Univ, Devis Chem Chem Engn & Environm, Fushun 113001, Peoples R China
2.Northeastern Univ, Key Lab Anisotropy & Texture Mat, Minist Educ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Feng Min,Chen Minghui,Yu Zhongdi,et al. Comparative Study of Thermal Shock Behavior of the Arc Ion Plating NiCrAlY and the Enamel Based Composite Coatings[J]. ACTA METALLURGICA SINICA,2017,53(12):1636-1644.
APA Feng Min,Chen Minghui,Yu Zhongdi,Lv Zhenbo,Zhu Shenglong,&Wang Fuhui.(2017).Comparative Study of Thermal Shock Behavior of the Arc Ion Plating NiCrAlY and the Enamel Based Composite Coatings.ACTA METALLURGICA SINICA,53(12),1636-1644.
MLA Feng Min,et al."Comparative Study of Thermal Shock Behavior of the Arc Ion Plating NiCrAlY and the Enamel Based Composite Coatings".ACTA METALLURGICA SINICA 53.12(2017):1636-1644.
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