论文部分内容阅读
结合近年来国内外高能超声分散技术制备镁基复合材料的研究热点及课题组近5年来实验研究成果,总结了高能超声复合分散法制备镁基纳米复合材料的关键性技术。采用半固态搅拌与高能超声处理相结合的复合分散法制备出纳米SiC颗粒、碳纳米管(CNTs)增强AZ91D镁基纳米复合材料,并对这两种镁基纳米复合材料的显微结构和力学性能进行测试分析。结果表明,纳米SiC颗粒、CNTs分散效果良好,复合材料的屈服强度和抗拉强度较铸态AZ91D合金有大幅度的提高,塑性也有一定的改善。
Combining with the research hotspots of Mg-based composites prepared by high-energy ultrasonic dispersion technology at home and abroad and the experimental research results of the research group over the past five years, the key technologies of high-energy ultrasonic dispersion method for preparing magnesium-based nanocomposites were summarized. Nanosized SiC particles and carbon nanotubes (CNTs) reinforced AZ91D magnesium-based nanocomposites were prepared by a composite dispersion method combining semi-solid state stirring with high-energy ultrasonic treatment. The microstructure and mechanical properties of the two magnesium-based nanocomposites Performance test analysis. The results show that nano-SiC particles and CNTs disperse well. The yield strength and tensile strength of the composites are much higher than that of the as-cast AZ91D alloy, and the plasticity is also improved.