摘要
采用超声波搅拌方法制备了原位自生Mg_2Si/Al基复合材料,研究了超声波功率对复合材料凝固组织和力学性能的影响。结果表明:超声波搅拌不但能够细化初生Mg_2Si颗粒,改变凝固组织形貌,而且具有除气除杂功能,二者共同提高了Mg_2Si/Al基复合材料的力学性能。在本实验条件下:超声波功率为150 W时,Mg_2Si/Al基复合材料抗拉强度最高,为178 MPa;而伸长率则在超声波功率为100 W时最好,为4.94%。
In situ Mg_2Si/Al composites were prepared by ultrasonic stirring technique. The effects of the ultrasonic stirring power on solidified microstructure and mechanical properties of the composite were investigated. The results indicate that the ultrasonic stirring not only has the primary Mg_2Si particle refinement to improve the solidified microstructure,but also makes gas and impurity be removed from the Mg_2Si/Al melt,in which the mechanical properties of the composites are improved. Some conclusions are obtained in this experiment:the tensile strength of the composite reaches at 178 MPa as the ultrasonic power is 150 W,and the elongation of the composite reaches at4. 94% as the ultrasonic power is 100 W,respectively.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2015年第S2期6-12,共7页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51361012)
江西省自然科学基金(20114bab206014)
江西省教育厅重点科技项目(GJJ11021)