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用改良静滴法对钼浓度在0%到10%(质量分数)的NiCoAlMo四元合金的液态密度进行了测量,NiCoAlMo合金的Ni:Co:Al摩尔比与商用镍基超合金TMS75、INCO713、CM247LC和CMSX-4的Ni:Co:Al摩尔比接近(xNi:xCo:xAl=73:12:15)。结果表明:液态密度随温度的增加而减小,随合金中钼浓度的增加而增加;液态NiCoAlMo四元合金的摩尔体积随温度和合金中钼浓度的增加而增加,与理想混合相比,呈负偏差。由镍基二元合金中镍、钴、铝、钼4个元素的偏摩尔体积计算获得的NiCoAlMo四元合金的液态密度与实验测量密度吻合良好,表明在误差范围内,多元镍基合金的液态密度可以通过二元镍基合金中相应元素的偏摩尔体积进行预测估计。
The liquid density of NiCoAlMo quaternary alloy with molybdenum concentration from 0% to 10% (mass fraction) was measured by modified drop method. The molar ratio of Ni: Co: Al in NiCoAlMo alloy to the commercial nickel base superalloy TMS75, INCO713, The Ni: Co: Al molar ratio of CM247LC and CMSX-4 approaches (xNi: xCo: xAl = 73: 12: 15). The results show that the liquid density decreases with the increase of the temperature and increases with the increase of the molybdenum concentration in the alloy. The molar volume of the liquid NiCoAlMo quaternary alloy increases with the increase of the temperature and the molybdenum concentration in the alloy. Compared with the ideal mixture, Negative deviation. The liquid density of the NiCoAlMo quaternary alloy calculated from the partial molar volumes of 4 elements of nickel, cobalt, aluminum and molybdenum in the nickel-based binary alloy is in good agreement with the experimental measured density, indicating that within the error range, the liquid state of the nickel- Density can be estimated from the partial molar volumes of the corresponding elements in binary nickel-based alloys.