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Sintering mechanism of the Cu-Ag core-shell nanoparticle paste at low temperature in ambient air
Tian, Yanhong1; Jiang, Zhi1; Wang, Chenxi1; Ding, Su1; Wen, Jiayue1; Liu, Zhiquan2; Wang, Chunqing1
Corresponding AuthorTian, Yanhong(tianyh@hit.edu.cn)
2016
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume6Issue:94Pages:91783-91790
AbstractCopper (Cu) nanoparticle (NP) paste has emerged as a promising choice for future high power electronics. However, the application of CuNP paste is generally limited because of its easy oxidation and complex processing parameters such as high sintering temperature (similar to 400 degrees C) and necessary protection atmosphere. Although capping CuNPs with a stable layer to form core-shell NPs could improve its anti-oxidation ability, current coating methods usually required complex equipment and protection atmosphere, and there have been no reports of fabricating joints with core-shell NPs. In this paper, Cusilver (Ag) core-shell NPs with a unique structure, i.e., tiny AgNPs with an average diameter of 6.9 nm which almost completely cover the surface of initial smooth CuNPs, after first developing them in ambient air and then using a mild two-step method, are reported. After coating the tiny AgNPs on the surface, not only was the anti-oxidation ability improved during keeping (similar to 2 months), but also the sintering temperature of NP paste was lowered similar to 70 degrees C. Through in situ observation during sintering, it was found that the tiny AgNPs tended to pre-melt and pre-wet to form active quasi-liquid Ag films, after which the Cu-Ag core-shell NPs were joined by the first to be found pure Ag sintering necks. Furthermore, the application of the Cu-Ag core-shell NP paste was demonstrated by fabricating voidless joints with a shear strength of 26.5 MPa in ambient air at 250 degrees C, and this showed a good potential for the future applications in high power electronics.
Funding OrganizationNational Natural Science Foundation of China ; Program for New Century Excellent Talents in University
DOI10.1039/c6ra16474a
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51522503] ; Program for New Century Excellent Talents in University[NCET-13-0175]
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000385367300084
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:28[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/122906
Collection中国科学院金属研究所
Corresponding AuthorTian, Yanhong
Affiliation1.Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Tian, Yanhong,Jiang, Zhi,Wang, Chenxi,et al. Sintering mechanism of the Cu-Ag core-shell nanoparticle paste at low temperature in ambient air[J]. RSC ADVANCES,2016,6(94):91783-91790.
APA Tian, Yanhong.,Jiang, Zhi.,Wang, Chenxi.,Ding, Su.,Wen, Jiayue.,...&Wang, Chunqing.(2016).Sintering mechanism of the Cu-Ag core-shell nanoparticle paste at low temperature in ambient air.RSC ADVANCES,6(94),91783-91790.
MLA Tian, Yanhong,et al."Sintering mechanism of the Cu-Ag core-shell nanoparticle paste at low temperature in ambient air".RSC ADVANCES 6.94(2016):91783-91790.
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