IMECH-IR  > 非线性力学国家重点实验室
Microstructure Observation and Nanoindentation Size Effect Characterization for Micron-/Nano-Grain TBCs
Liu, HY1; 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
Corresponding AuthorWei, Yueguang(weiyg@pku.edu.cn) ; Liang, Lihong(lianglh@mail.buct.edu.cn)
Source PublicationCOATINGS
2020-04-01
Volume10Issue:4Pages:12
ISSN2079-6412
AbstractMicrostructure 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.
Keywordmicron- nano-grain coatings microstructure nanoindentation size effect trans-scale mechanics theory
DOI10.3390/coatings10040345
Indexed BySCI
Language英语
WOS IDWOS:000534630600042
WOS KeywordTHERMAL BARRIER COATINGS ; IN-FLIGHT BEHAVIOR ; MECHANICAL-PROPERTIES ; ZIRCONIA COATINGS ; SHOCK RESISTANCE ; ELASTIC-MODULUS ; YOUNGS MODULUS ; YTTRIA ; HARDNESS ; EVOLUTION
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Coatings & Films
Funding ProjectNational 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]
Funding OrganizationNational Natural Science Foundation of China
Classification二类
Ranking3
ContributorWei, Yueguang ; Liang, Lihong
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/82082
Collection非线性力学国家重点实验室
Affiliation1.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
Recommended Citation
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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