摘要
Surface tension of molten Ni-(Cr,Co,W) alloys was measured at the temperature of 1 773-1 873 K in an Ar+3%H2 atmosphere using an improved sessile drop method.The segregation of Cr,Co and W in alloy was calculated and analyzed using Butler's equation.The results show a good agreement between measured and calculated data.The surface tension of molten Ni-(Cr,Co,W) alloys decreases with increasing temperature.In Ni-(Cr,Co,W) alloys,the element with lower surface tension tends to segregate on the surface of molten alloy while that with higher surface tension tends to segregate inside of the molten alloy.The larger the differences in surface tension,atom radius and electron configuration between solvent and solute are,the more significant the segregation is.As a result,Ni segregates onto the surface and Co and W segregate inside the alloys.
Surface tension of molten Ni-（Cr, Co, W） alloys was measured at the temperature of 1 773-1 873 K in an Ar＋3%H2 atmosphere using an improved sessile drop method. The segregation of Cr, Co and W in alloy was calculated and analyzed using Butler＇s equation. The results show a good agreement between measured and calculated data. The surface tension of molten Ni-（Cr, Co, W） alloys decreases with increasing temperature. In Ni-（Cr, Co, W） alloys, the element with lower surface tension tends to segregate on the surface of molten alloy while that with higher surface tension tends to segregate inside of the molten alloy. The larger the differences in surface tension, atom radius and electron configuration between solvent and solute are, the more significant the segregation is. As a result, Ni segregates onto the surface and Co and W segregate inside the alloys.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2008年第5期1184-1188,共5页
Transactions of Nonferrous Metals Society of China
基金
Project(2004527) supported by Scientific Research Foundation for the Returned Overseas Chinese Scholars
Project(200594) supported by the Chongqing Bureau of Personal, China
Project(KJ070603) supported by the Municipal Education Commission of Chongqing, China
Project(2003ZD31) supported by Chongqing Institute of Technology, China
Project(CSTC2005BA4016-1) supported by Chongqing Science and Technology Commission,China
