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WANG Hui, LIU Xincai, PAN Jing, MA Yongcun. High-temperature oxidation behavior of cerium on the surface of Sn-Zn lead-free solders[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (12): 65-69.
Citation: WANG Hui, LIU Xincai, PAN Jing, MA Yongcun. High-temperature oxidation behavior of cerium on the surface of Sn-Zn lead-free solders[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (12): 65-69.
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High-temperature oxidation behavior of cerium on the surface of Sn-Zn lead-free solders

  • Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China

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  • Received Date: August 19, 2010
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  • The distribution and existing form of Ce on the surface of Sn-9Zn-0.15Ce and Sn-9Zn-0.002Al-0.2Ga-0.25Ag-0.15Ce solder are investigated by atomic emission spectrometry and X-ray photoelectron spectroscopy.Results indicate that Ce enriches on the surface of the Sn-9Zn-0.15Ce solder in the range of 0 to 40 nm.The concentration of Ce in the enriched zone is about 30 at.%,which is 250 times of that in the bulk solder,and the enriched Ce on the surface is mostly oxidized as CeO2 and Ce2O3.With the multi-addition of Ga and Al in the Sn-9Zn-0.002Al-0.2Ga-0.25Ag-0.15Ce solder,Ga enriches in range of 0 to 6 nm on the surface,while Al enriches in range of 2 to 20 nm in oxidized form.The Ce-enriched layer is in the range of 2 to 60 nm on the surface covered by the Ga and Al enriched layers,and the oxidation of Ce is depressed significantly.
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