Sintering mechanism of the Cu-Ag core-shell nanoparticle paste at low temperature in ambient air

doi:10.1039/c6ra16474a

CORC > 金属研究所 > 中国科学院金属研究所

	Sintering mechanism of the Cu-Ag core-shell nanoparticle paste at low temperature in ambient air
	Tian, Yanhong 2; Jiang, Zhi 2; Wang, Chenxi 2; Ding, Su 2; Wen, Jiayue 2; Liu, Zhiquan 1; Wang, Chunqing 2
刊名	RSC ADVANCES
	2016
卷号	6 期号:94 页码:91783-91790
ISSN号	2046-2069
DOI	10.1039/c6ra16474a
通讯作者	Tian, Yanhong(tianyh@hit.edu.cn)
英文摘要	Copper (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.
资助项目	National Natural Science Foundation of China[51522503] ; Program for New Century Excellent Talents in University[NCET-13-0175]
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000385367300084
资助机构	National Natural Science Foundation of China ; Program for New Century Excellent Talents in University
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/122905]
专题	金属研究所_中国科学院金属研究所
通讯作者	Tian, Yanhong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
推荐引用方式 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.