三元液态合金Al85Ni10M5的比热容

Specific Heat of Ternary Liquid Al85Ni10M5 Alloys

摘要:

利用差示扫描量热仪测定了三元液态合金Al85Ni10M5(添加元素M包括Si，Mn，Ti和Ce)的比热容。结果表明：在高温处Al85Ni10M5液态合金的比热容曲线上均有驼峰出现，其位置随添加元素的原子半径的增大和电负性的减小而向高温处偏移。而且更高温度处，比热容值出现线性下降趋势。液态合金比热容的变化规律充分说明了液态合金中具有微观组织的不均匀性。

Abstract:

The specific heat capacity of ternary liquid Al85Ni10M5 alloys (addition elements M include Si, Mn, Ti and Ce) has been investigated using differential scanning calorimetry (DSC). Experimental results show that a hump occurs on the curve of specific heat capacity of Al85Ni10M5 alloys at elevated temperatures. The position of the hump shifts to a higher temperature with increasing atomic radius and decreasing electronegativity of addition elements. Furthermore, the specific heat capacity of ternary liquid Al85Ni10M5 alloys tends to descend at higher temperatures. The variation of specific heat capacity of liquid alloys with temperature shows that the micro-inhomogeneity exists in the liquid alloys.