IMECH-IR  > 非线性力学国家重点实验室
Thickness-dependent fracture characteristics of ceramic coatings bonded on the alloy substrates
Li XN; Liang LH(梁立红); Xie JJ(谢季佳); Chen L; Wei YG(魏悦广); Liang, LH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Source PublicationSURFACE & COATINGS TECHNOLOGY
2014-11-15
Volume258Pages:1039-1047
ISSN0257-8972
AbstractThe ceramic coatings with different thicknesses in the range of 150 mu m to 490 mu m, bonded on the same alloy substrates, were obtained by the air plasma spray method. The crack evolution and the fracture characteristics of the samples were observed synchronously under the three-point bending load using a scanning electron microscope. The results show different fracture modes for the thinner and the thicker coating samples; the multiple transverse cracks, vertical to the interface between the coatings and the substrates, in the coatings are the main fracture mode for the samples with coatings thinner than about 200 mu m, while the interface crack is the main fracture mode for the samples with coatings thicker than about 300 mu m. Different fracture modes were theoretically analyzed based on the nonlinear delamination model, and the calculated critical thickness is 255 mu m, which agrees well with the experimental result. The finite element simulations for the corresponding coatings with a series of thicknesses were carried out by introducing the interface cohesive model, and the simulations show results similar to those of the experimental observations. The study indicates that the fracture modes depend on the thickness of the coatings, and the critical thickness depends on the intrinsic properties of coatings and the interfaces between the coatings and the substrates, such as the elastic modulus, the interface strength and the fracture energy. (C) 2014 Elsevier B.V. All rights reserved.
KeywordThickness Of Coatings Fracture Modes Three-point Bending Interface Cohesive Model
Subject AreaMaterials Science ; Physics
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000346895000127
Funding OrganizationThis work was supported by the National Basic Research Programs of China (No. 2012CB937500), the NSFC grants of China (Nos. 10802088, 11372318, 11023001, 11021262, 10932011 and 91216108), and the CAS/SAFEA International Partnership Program for Creative Research Teams.
DepartmentLNM新型材料及结构的多尺度力学
Classification二类/Q1
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/49475
Collection非线性力学国家重点实验室
Corresponding AuthorLiang, LH (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Li XN,Liang LH,Xie JJ,et al. Thickness-dependent fracture characteristics of ceramic coatings bonded on the alloy substrates[J]. SURFACE & COATINGS TECHNOLOGY,2014,258:1039-1047.
APA Li XN,梁立红,谢季佳,Chen L,魏悦广,&Liang, LH .(2014).Thickness-dependent fracture characteristics of ceramic coatings bonded on the alloy substrates.SURFACE & COATINGS TECHNOLOGY,258,1039-1047.
MLA Li XN,et al."Thickness-dependent fracture characteristics of ceramic coatings bonded on the alloy substrates".SURFACE & COATINGS TECHNOLOGY 258(2014):1039-1047.
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