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Sn-3.5Ag-2Bi-0.7Cu無鉛焊料壓入蠕變性能的研究
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四川省教育廳“重點(diǎn)培育項(xiàng)目”（07ZZ033）


Research on Indentation Creep Property of Sn-3.5Ag-2Bi-0.7Cu Lead-Free Solder
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    摘要:

    對(duì)Sn-3.5Ag-2Bi-0.7Cu無鉛焊料在溫度為50~100 ℃，應(yīng)力為16.7~43.2 MPa條件下的壓入蠕變性能進(jìn)行研究。得到壓入蠕變的應(yīng)力指數(shù)n=3.181、蠕變激活能Q=59.189 kJ/mol、材料的結(jié)構(gòu)常數(shù)A=0.423。獲得Sn-3.5Ag-2Bi-0.7Cu無鉛焊料穩(wěn)態(tài)壓入蠕變速率本構(gòu)方程：=0.423σ3.181exp（–59189/RT）。隨著溫度和應(yīng)力的增加，Sn-3.5Ag-2Bi-0.7Cu無鉛焊料的壓入蠕變速率明顯增加，蠕變后Ag3Sn、Cu6Sn5相明顯變粗變短。A

    Abstract:

    The indentation creep behaviour of Sn-3.5Ag-2Bi-0.7Cu lead-free solder was studied in the temperature range of 50-100 ℃ and indentation stress range of 16.7-43.2 MPa. The stress exponent n of 3.181, creep activation energy Q of 59.189 kJ/mol, and material structural constant A of 0.423 were obtained. The constitutive equation of the steady state indentation creep rate of the Sn-3.5Ag-2Bi-0.7Cu lead-free solder was =0.423σ3.181exp(–59189/RT). The experiment shows that the indentation creep rate increased dramatically as the temperature and stress increased. The Ag3Sn and Cu6Sn5 phases became coarser and shorter after indentation creep, which could increase indentation creep resisting property by strengthening β-Sn matrix.

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曾 明,陳正周,沈保羅,徐道芬,廖春麗. Sn-3.5Ag-2Bi-0.7Cu無鉛焊料壓入蠕變性能的研究[J].稀有金屬材料與工程,2009,38(8):1353~1357.[Zeng Ming, Chen Zhengzhou, Shen Baoluo, Xu Daofen, Liao Chunli. Research on Indentation Creep Property of Sn-3.5Ag-2Bi-0.7Cu Lead-Free Solder[J]. Rare Metal Materials and Engineering,2009,38(8):1353~1357.]
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  • 收稿日期:2008-07-27
  • 最后修改日期:2009-05-18
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