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以Al-Si O2为体系,通过粉末冶金液相烧结的方法原位合成(Al2O3+Si)p/Al系铝基复合材料,利用XRD、DSC和SEM等测试技术测试了复合材料的相组成、密度、电导率及热膨胀性能,观察了Si相和Al2O3相的形貌并分析了相与相之间的反应界面。结果表明,通过该方法可以制备出具有优良性能的电子封装材料,其密度、电导率和热膨胀系数分别达到了2.5 g/cm3、10-7Ω·m和5×10-6/K。原位生成的Al2O3相多数呈圆球状颗粒,Si相以片状形成,随着烧结温度的提高,两种相和基体结合紧密,分布更加均匀分散,且无界面反应物生成。
The Al-Si O2 system was used to synthesize (Al2O3 + Si) p / Al aluminum matrix composites by in-situ powder metallurgy liquid-phase sintering. The phase compositions of the composites were tested by XRD, DSC and SEM. Density, electrical conductivity and thermal expansion properties, the morphologies of Si phase and Al2O3 phase were observed and the reaction interface between phase and phase was analyzed. The results show that the electronic packaging material with excellent properties can be prepared by this method. The density, electrical conductivity and thermal expansion coefficient of the electronic packaging material are respectively 2.5 g / cm3, 10-7Ω · m and 5 × 10-6 / K. The majority of in-situ Al 2 O 3 phases were spherical particles, and the Si phase was flaky. With the increase of sintering temperature, the two phases were close to the matrix and distributed more evenly, and no interfacial reactants were formed.