Effect of Powder Metallurgy on Microstructures and Mechanical Properties of Sn2.5Ag0.7Cu0.1RE Lead-free Solder
Journal Title: 河南科技大学学报（自然科学版） - Year 2018, Vol 39, Issue 6
Abstract
Based on the powder metallurgy ( PM) process design of low-melting Sn2. 5 Ag0. 7 Cu0. 1 RE alloy, the effects of compacting and sintering on the microstructure and mechanical properties of the solder alloy were studied. The results shows that the compacting stress and sintering temperature of low-melting Sn2. 5 Ag 0. 7 Cu0. 1 RE solder alloy are higher than that of copper and aluminum high-melting alloys. The preparation of Sn2. 5 Ag0. 7 Cu0. 1 RE solder alloy is achieved at the compacting stress 160 MPa and sintering temperature210 ℃ by PM. In addition, the tensile strength of the Sn2. 5 Ag0. 7 Cu0. 1 RE solder alloy increases by 15. 5%compared with the melting technology. The sintering has effects on themorphologies of the primary β-Sn phase and the eutectic structure of the Sn2. 5 Ag0. 7 Cu0. 1 RE solder alloy. The proportion of primary β-Sn phase increases with the increase of sintering temperature.
Authors and Affiliations
Meng ZHANG, Keke ZHANG, Fupeng HUO, Huigai WANG
Keywords
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