Measurement and analyses of molten Ni-Co alloy density
(1. College of Materials Science and Engineering, Chongqing Institute of Technology, Chongqing 400050, China;
2. Satellite Venture Business Laboratory, Kyushu Institute of Technology,
Kitakyushu 804-8550, Japan;
3. Department of Applied Physics, Chongqing University, Chongqing 400044, China)
2. Satellite Venture Business Laboratory, Kyushu Institute of Technology,
Kitakyushu 804-8550, Japan;
3. Department of Applied Physics, Chongqing University, Chongqing 400044, China)
Abstract: With the advent of powerful mathematical modeling techniques for material phenomena, there is renewed interest in reliable data for the density of the Ni-based superalloys. Up to now, there has been few report on the density of molten Ni-Co alloy. In order to obtain more accurate density data for molten Ni-Co alloy, the density of molten Ni-Co alloy was measured with a modified sessile drop method, and the accommodation of different atoms in molten Ni-Co alloy was analyzed. The density of alloy is found to decrease with increasing temperature and Co concentration in the alloy. The molar volume of molten Ni-Co alloy increases with increasing Co concentration. The molar volume of Ni-Co alloy determined shows a positive deviation from the linear molar volume, and the deviation of molar volume from ideal mixing increases with increasing Co concentration over the experimental concentration range.
Key words: Ni-Co alloy; density; molar volume; modified sessile drop method