以Al-Li合金为对象,通过DSC技术研究了合金的相变.确定了相变温度范围、类型及其微观机理,确立了相变动力学计算方法,并以此计算了δ'相的析出和溶解的激活能.研究表明:δ'相析出为一级反应机制、δ'相溶解则为三维扩散机制;在本实验条件下,δ'相的析出激活能为188 kJ/mol～214 kJ/mol,δ'相的溶解激活能为158 kJ/mol～228kJ/mol.根据实验和分析,可以认为采用热分析动力学方法能定量地表征Al-Li合金的相变.
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