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Damage characterization model of ceramic coating systems based on energy analysis and bending tests
Liu HY; Wei YG(魏悦广); Liang LH(梁立红); Liu XH; Wang YB; Ma HS
2018-04-01
发表期刊CERAMICS INTERNATIONAL
卷号44期号:5页码:4807-4813
ISSN0272-8842
摘要A quantitative damage model of ceramic coating systems was developed based on their load-displacement curves obtained from three-point bending tests. According to the energy mechanism of damage, the normalized damage rate of such systems can be simply expressed using the load and the tangent slope of their load-displacement curves. The experimental results demonstrated the thickness dependence of fracture and damage. In thin coating systems, tensile failure was found to be predominant and multiple transverse cracks appeared in the coatings. In contrast, thick coating systems showed a predominance of interface shear failure and the occurrence of interface delamination. These observations are consistent with previous experimental results. The damage of the systems displayed catastrophic characteristics when the load tended to reach the failure point, i.e., the damage increased rapidly, and the damage rate displayed a power-law singularity at the failure point. These results are consistent with the damage characteristics predicted using the mathematic model. The damage evolution in the case of interface delamination in the thick coating systems was faster than that for transverse cracking in the thin coatings because of the difference in the degree of damage localization. The present model provides an effective method to elucidate the damage behavior of brittle ceramic coating systems, and hence, it is expected to greatly aid the coating design.
关键词Ceramic coatings Damage characterization Fracture Thickness effect
DOI10.1016/j.ceramint.2017.12.068
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000425204400036
关键词[WOS]THERMAL BARRIER COATINGS ; FRACTURE CHARACTERISTICS ; SHOCK RESISTANCE ; CYCLE DURATION ; EVOLUTION ; FAILURE ; TENSILE ; TEMPERATURE ; MECHANISMS ; BEHAVIOR
WOS研究方向Materials Science, Ceramics
WOS类目Materials Science
项目资助者NSFC grants of China [11672296, 11372318, 11432014, 11672301] ; Chinese Academy of Sciences [XDB22040501]
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力学所作者排名1
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77813
专题非线性力学国家重点实验室
作者单位1.[Liu, H. Y.
2.Wei, Y. G.
3.Liang, L. H.
4.Liu, X. H.
5.Wang, Y. B.
6.Ma, H. S.] Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
7.[Liu, H. Y.
8.Wei, Y. G.] Peking Univ, Coll Engn, Beijing 100871, Peoples R China
9.[Liang, L. H.] Univ Chinese Acad Sci, Beijing 101408, Peoples R China
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GB/T 7714
Liu HY,Wei YG,Liang LH,et al. Damage characterization model of ceramic coating systems based on energy analysis and bending tests[J]. CERAMICS INTERNATIONAL,2018,44(5):4807-4813.
APA Liu HY,魏悦广,梁立红,Liu XH,Wang YB,&Ma HS.(2018).Damage characterization model of ceramic coating systems based on energy analysis and bending tests.CERAMICS INTERNATIONAL,44(5),4807-4813.
MLA Liu HY,et al."Damage characterization model of ceramic coating systems based on energy analysis and bending tests".CERAMICS INTERNATIONAL 44.5(2018):4807-4813.
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