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在80%Al-20%CuO(质量分数)体系中,通过原位反应法制备Al2O3p-Al复合材料。采用不同方法研究CuO颗粒粒度对复合材料合成温度和显微组织的影响。结果表明,Cu O颗粒粒度对Al-CuO体系的完全反应温度有显著影响:含有粒度小于6μm CuO颗粒样品的完全反应温度比含有粒度小于100μm CuO颗粒样品的完全反应温度低200°C。当反应温度低于某一临界值时,原位Al2O3颗粒和Al基体之间不能完全结合;当温度高于某一临界值时,原位Al2O3颗粒的形貌从棒状转变成近球形。这两个临界温度受Cu O颗粒粒度的影响:含有粒度小于6μm Cu O颗粒样品的临界温度比含有小于100μm CuO颗粒样品的临界温度低100°C。
In 80% Al-20% CuO (mass fraction) system, Al2O3p-Al composites were prepared by in-situ reaction. Different methods were used to study the effect of CuO particle size on the synthesis temperature and microstructure of composites. The results show that the particle size of CuO has a significant effect on the reaction temperature of Al-CuO system. The complete reaction temperature of CuO particles with particle size less than 6μm is 200 ℃ lower than the complete reaction temperature of CuO particles with particle size less than 100μm. When the reaction temperature is lower than a certain critical value, the in-situ Al 2 O 3 particles can not be completely bonded with the Al matrix. When the temperature is higher than a certain critical value, the in-situ Al 2 O 3 particle morphology changes from a rod shape to a nearly spherical shape. The two critical temperatures are affected by the particle size of the CuO particles: the critical temperature for samples containing CuO particles smaller than 6 [mu] m is 100 ° C lower than the critical temperature for samples containing less than 100 [mu] m CuO particles.