China Business Newsweekly
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Metals
Scientists at National Taiwan University describe research in metals
December 23rd, 2008
According to recent research from Taipei, Taiwan, "In contrast to the large cluster-shaped CeSn3 peritectic phase formed in Sn-3Ag-0.5Cu-0.5Ce solder, Sn-9Zn-0.5Ce possesses very fine (Ce0.8Zn0.2)Sn-3 intermetallics. Image analyses indicate that the total exposed area of fine peritectic intermetallics in Sn-9Zn-0.5Ce solder is near that of coarse clusters in Sn-3Ag-0.5Cu-0.5Ce." "However, long fiber-type and coarse hillock-type whiskers have been observed on the surface of Sn-3Ag-0.5Cu-0.5Ce after air storage at room temperature and 150 degrees C, respectively. On the contrary, only tin sprouts appear on the oxide layer of peritectic (Ce0.8Zn0.2)Sn-3 intermetallics of...
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Source: China Business Newsweekly (2008-12-23)
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