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EFFECTS OF ATMOSPHERE AND TRACE ELEMENT ADDED ON WETTABILITY OF LIQUID Ag TO W |
WU Shenqing;ZHANG Deyuan Southeast University; Nanjing |
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Cite this article:
WU Shenqing;ZHANG Deyuan Southeast University; Nanjing. EFFECTS OF ATMOSPHERE AND TRACE ELEMENT ADDED ON WETTABILITY OF LIQUID Ag TO W. Acta Metall Sin, 1992, 28(1): 62-66.
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Abstract The contact angle of liquid Ag with solid W and its temperature dependance were examined by sessile drop method under various atmospheres, e.g.vacuum, Ar, H_2 and cracked NH_3. The O_2 partial pressure in the atmosphere is found to be the major factor. An obvious improvement on the wettability may be made by a trace amount of Ni, Cu or Ce added to liquid Ag. The contact angle near M.P. is then narrowed from 69 to about 10--20 deg.
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Received: 18 January 1992
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