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Effect of Nanometer WC Coating on Thermal Conductivity of Diamond/6061 Composites
Dong, Z. Y.1,2; Wang, D.1; Wang, W. G.3; Xiao, B. L.1; Ma, Z. Y.1
Corresponding AuthorWang, D.(dongwang@imr.ac.cn)
2022-08-23
Source PublicationACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN1006-7191
Pages9
AbstractDiamond has poor interface tolerance with Al. To enhance interface bonding, in this study, tungsten carbide (WC) nanocoatings on the surface of diamond particles were prepared using sol-gel and in-situ reaction methods. WO3 sol-gel with two concentrations, 0.2 mol/L, and 0.5 mol/L, was, respectively, coated on diamond particles, then sintered at 1250 degrees C for 2 h to produce WC nanocoatings. The concentration of 0.2 mol/L WO3 sol-gel was not enough to cover the surface of the diamond completely, while 0.5 mol/L WO3 sol-gel could fully cover it. Moreover, WO3 was preferentially deposited on {100} planes of the diamond. WO3 converted to WC in-situ nanocoatings after sintering due to the in-situ reaction of WO3 and diamond. The diamond-reinforced Al composites with and without WC coating were fabricated by powder metallurgy. The diamond/Al composite without coating has a thermal conductivity of 584.7 W/mK, while the composite with a coating formed by 0.2 mol/L and 0.5 mol/L WO3 sol-gel showed thermal conductivities of 626.1 W/mK and 584.2 W/mK, respectively. The moderate thickness of nanocoatings formed by 0.2 mol/L WO3 sol-gel could enhance interface bonding, therefore improving thermal conductivity. The nanocoating produced by 0.5 mol/L WO3 sol-gel cracked during the fabrication of the composite, leading to Al12W formation and a decrease in thermal conductivity.
KeywordDiamond Al matrix composite Nanometer coating WC Thermal conductivity
Funding OrganizationNational Natural Science Foundation of China ; Liaoning Revitalization Talents Program
DOI10.1007/s40195-022-01450-2
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51931009] ; Liaoning Revitalization Talents Program[XLYC2007009]
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000843406200001
PublisherCHINESE ACAD SCIENCES, INST METAL RESEARCH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/174483
Collection中国科学院金属研究所
Corresponding AuthorWang, D.
Affiliation1.Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
3.Liaoning Shihua Univ, Fushun 113001, Peoples R China
Recommended Citation
GB/T 7714
Dong, Z. Y.,Wang, D.,Wang, W. G.,et al. Effect of Nanometer WC Coating on Thermal Conductivity of Diamond/6061 Composites[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2022:9.
APA Dong, Z. Y.,Wang, D.,Wang, W. G.,Xiao, B. L.,&Ma, Z. Y..(2022).Effect of Nanometer WC Coating on Thermal Conductivity of Diamond/6061 Composites.ACTA METALLURGICA SINICA-ENGLISH LETTERS,9.
MLA Dong, Z. Y.,et al."Effect of Nanometer WC Coating on Thermal Conductivity of Diamond/6061 Composites".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2022):9.
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