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采用原位合成和外加法两种粉末冶金方法制备了质量分数为10%、20%、30%、40%的Al3Ti颗粒增强镁基复合材料,并对复合材料进行了XRD衍射分析、微观组织分析以及硬度、压缩强度和磨损性能的分析。结果表明,原位合成法制备的复合材料中Al3Ti颗粒尺寸较细,为1～5μm;外加法制备的复合材料中Al3Ti颗粒尺寸为5～15μm;Al3Ti颗粒均匀分散在镁基体中,可大幅度提高材料的强度和耐磨性能;原位合成法比外加法具有更好的强化效果,随着Al3Ti含量的增加,复合材料的硬度和压缩强度显著增加;原位合成法、外加法制备的复合材料中Al3Ti含量分别为20%、30%时耐磨性能最佳。
Al3Ti particle reinforced Mg-matrix composites with mass fraction of 10%, 20%, 30% and 40% were prepared by in-situ and extrinsic addition methods respectively. The composite was characterized by X-ray diffraction and microstructure analysis As well as analysis of hardness, compressive strength and wear properties. The results show that the size of Al3Ti particles in the composites prepared by in-situ synthesis is 1 ~ 5μm, the size of Al3Ti particles in the composite is 5 ~ 15μm, and the Al3Ti particles are uniformly dispersed in the Mg matrix. Improve the strength and wear resistance of the material; in-situ synthesis method has better strengthening effect than the addition method, with the increase of Al3Ti content, the hardness and compressive strength of the composite significantly increased; in-situ synthesis method, Al3Ti content of materials were 20%, 30%, the best wear resistance.