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用超声原位反应技术合成Al2Sm颗粒增强镁合金,采用光学显微镜、扫描电镜和X射线衍射仪分析了AZ61-2Sm镁合金的组织形貌和相组成。结果表明,AZ61-2Sm镁合金在600 W超声波下作用2min,原位生成的Al2Sm增强相更加细小,团聚现象得到改善,增强相尺寸从约13μm减小到6μm左右。超声作用瞬时产生的高温、高压使得AZ61-2Sm合金中不连续网状的Mg17Al12相熔断、团聚状的Al2Sm相击碎成细小颗粒状;细小的Al2Sm颗粒在声流效应作用下宏观均匀分散于整个熔体中。
The Al2Sm particle reinforced magnesium alloy was synthesized by ultrasonic in situ reaction. The microstructure and phase composition of AZ61-2Sm magnesium alloy were analyzed by optical microscope, scanning electron microscopy and X-ray diffraction. The results show that the AZ61-2Sm magnesium alloy is treated with 600 W ultrasonic wave for 2min, the Al2Sm reinforced phase formed in situ is more fine and the agglomeration phenomenon is improved. The size of the reinforced phase is reduced from about 13μm to about 6μm. Ultrasonic instantaneous high temperature and high pressure make AZ61-2Sm alloy discontinuous network of Mg17Al12 phase fuse, agglomeration of Al2Sm phase crushed into small particles; fine Al2Sm particles under the effect of sound flow macroscopically dispersed throughout the entire Melt.