(1.中南工业大学材料科学与工程系，长沙410083；
2.广州工学院材料系，广州510090；
3.清华大学材料科学与工程系，北京100084)
摘 要: 用两种X射线衍射法确定了金属间化合物Ni3Al的德拜温度ΘD为550 K并利用新发展的“固体中多原子相互作用的新势能函数”和测定的Ni3Al合金的德拜温度，计算了Ni3Al合金的结合能、形成热、体弹性模量以及比热和线热膨胀系数随温度变化的曲线。
关键字: Ni3Al X射线衍射 德拜温度 物理性质
PHYSICAL PROPERTIES OF Ni3Al
（Department of Materials Science and Engineering,
Central South University of Technology, Changsha 410083）
Abstract:The Debye temperature(ΘD)of intermetallic compound Ni3Al has been determined as 550 K by two X-Ray diffraction ways. The cohesive energy, formation heat, bulk modulus of elasticity and the curve of specific heat and linear coefficient of thermal expansion as a function of temperature have been calculated, using the new ly developed potential function of interactions of many atoms in solids and by measuring Debye temperature of Ni3Al alloy.
Key words: Ni3Al X-Ray diffraction Debye temperature physical properties
