Microstructure Observation and Nanoindentation Size Effect Characterization for Micron-/Nano-Grain TBCs

doi:10.3390/coatings10040345

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	Microstructure Observation and Nanoindentation Size Effect Characterization for Micron-/Nano-Grain TBCs
	Liu, HY 1; Wei YG(魏悦广)1 ; Liang LH(梁立红)2 ; Wang YB(王颖彪)3 ; Song JR(宋晶如)3 ; Long, H1 ; Liu, YW1
通讯作者	Wei, Yueguang(weiyg@pku.edu.cn) ; Liang, Lihong(lianglh@mail.buct.edu.cn)
发表期刊	COATINGS
	2020-04-01
卷号	10 期号:4 页码:12
ISSN	2079-6412
摘要	Microstructure observation and mechanical properties characterization for micron-/nano-grain thermal barrier coatings were investigated in this article. Scanning electron microscope images demonstrated that both micron-grain coating and nano-grain coating had micrometer-sized columnar grain structures; while the nano-grain coating had the initial nanostructures of the agglomerated powders reserved by the unmelted particles. The mechanical properties (hardness and modulus) of micron-/nano-grain coatings were characterized by using nanoindentation tests. The measurements indicated that the nano-grain coating possessed larger hardness and modulus than the micron-grain coating; which was related to the microstructure of coatings. Nanoindentation tests showed that the measured hardness increased strongly with the indent depth decreasing; which was frequently referred to as the size effect. The nanoindentation size effect of hardness for micron-/nano-grain coatings was effectively described by using the trans-scale mechanics theory. The modeling predictions were consistent with experimental measurements; keeping a reasonable selection of the material parameters.
关键词	micron- nano-grain coatings microstructure nanoindentation size effect trans-scale mechanics theory
DOI	10.3390/coatings10040345
收录类别	SCI
语种	英语
WOS记录号	WOS:000534630600042
关键词[WOS]	THERMAL BARRIER COATINGS ; IN-FLIGHT BEHAVIOR ; MECHANICAL-PROPERTIES ; ZIRCONIA COATINGS ; SHOCK RESISTANCE ; ELASTIC-MODULUS ; YOUNGS MODULUS ; YTTRIA ; HARDNESS ; EVOLUTION
WOS研究方向	Materials Science
WOS类目	Materials Science, Coatings & Films
资助项目	National Natural Science Foundation of China[11890681] ; National Natural Science Foundation of China[11672301] ; National Natural Science Foundation of China[11511202] ; National Natural Science Foundation of China[11672296] ; National Natural Science Foundation of China[91860102] ; National Natural Science Foundation of China[11432014]
项目资助者	National Natural Science Foundation of China
论文分区	二类
力学所作者排名	3
RpAuthor	Wei, Yueguang ; Liang, Lihong
引用统计	被引频次：8[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/311007/82082
专题	非线性力学国家重点实验室
作者单位	1.Peking Univ, Coll Engn, Dept Mech & Engn Sci, Beijing 100871, Peoples R China; 2.Beijing Univ Chem Technol, Coll Mech & Elect Engn, Beijing 100029, Peoples R China; 3.Chinese Acad Sci, Inst Mech, LNM, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liu, HY,Wei YG,Liang LH,et al. Microstructure Observation and Nanoindentation Size Effect Characterization for Micron-/Nano-Grain TBCs[J]. COATINGS,2020,10,4,:12.
APA	Liu, HY.,魏悦广.,梁立红.,王颖彪.,宋晶如.,...&Liu, YW.(2020).Microstructure Observation and Nanoindentation Size Effect Characterization for Micron-/Nano-Grain TBCs.COATINGS,10(4),12.
MLA	Liu, HY,et al."Microstructure Observation and Nanoindentation Size Effect Characterization for Micron-/Nano-Grain TBCs".COATINGS 10.4(2020):12.

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