Measurement and analyses of molten nickel-cobalt alloy surface tension

被引：2
|
作者：
Xiao Feng [1 ]
Liu Lanxiao [1 ]
Fang Liang [2 ]
Yang Renhui [1 ]
Fu Ya [1 ]
Zhao Hongkai [1 ]
机构：
[1] Chongqing Inst Technol, Mat Interfacial Phys Chem Res Inst, Chongqing 400050, Peoples R China
[2] Chongqing Univ, Chongqing 400044, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2008年 / 37卷 / 02期
关键词：
surface tension; Ni-Co alloys; segregation;
D O I：
10.1016/S1875-5372(09)60007-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Ni-Co super-alloy is widely used in high temperature and corrosive environments such as gas turbine engines and heat exchangers. The surface tensions of molten Ni and Ni-Co (5 and 10 mass fraction) alloys were measured at the temperature range of 1773 similar to 1873 K using an improved sessile drop method with an alumina substrate in an Ar+3%H-2 atmosphere. The surface tensions of molten Ni and Ni-Co (5 and 10 mass fraction) alloys decrease with increasing of temperature. On the basis of experimental data, the surface tension was also theoretically deduced both as functions of concentration and temperature using a model of Butler' equation. The alloy element segregation in this system was calculated. Cobalt concentration on surface of alloys is lower than that in bulk.
引用
收藏
页码：255 / 258
页数：4
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