摘要
外加质量分数为 2 0 %的SiO2 采用粉末冶金法成功制备了原位生成陶瓷相增强Al基复合材料 ,研究了复合材料烧结后的油磨性能、物相组成和组织形貌。油磨条件下 ,在 98～ 1 764N载荷内 ,复合材料的体积磨损量始终小于基体合金 1 96N时的体积磨损量 1 .67mm3,在 1 764N时的最大磨损量小于 0 .8mm3。复合材料的最终物相为MgAl2 O4 、MgO、Mg2 Si、Si和Al。在颗粒SiO2 与Al-Mg反应过程中 ,约有复合材料中质量分数为 2 .8%Mg和7.0 %Al及 0 .2 6 %Cu扩散入颗粒内 ,颗粒内约有质量分数为 9.74%Si,0 .2 3 %O被置换到颗粒外 ,颗粒主要由MgAl2 O4
Al matrix composites reinforced by in situ ceramics phases formed by adding SiO 2 particles have been fabricated by powder metallurgy process. The wear resistant, microscopic structures and phase compositions of the composites were studied, it was shown that under lubricated wear condition, the wear resistant of the composites always behaves very well in larger range of load (98～1764N) than that of the matrix alloy under 196N. The largest volume loss of the composites is not more than 0.8mm 3. The phase compositions of the composites are composed of MgAl 2O 4, MgO, Mg 2Si, Si and Al. During the reaction between SiO 2 particles and Al-Mg, about 7.0wt%Al, 2.8wt%Mg and 0.26wt%Cu diffuse from the outside to the inside of particles, about 9.74wt%Si and 0.23wt%O do on the contrary. The final particles mainly consist of MgAl 2O 4.mpositesarecomposedofM
出处
《兵器材料科学与工程》
CAS
CSCD
2002年第4期10-13,17,共5页
Ordnance Material Science and Engineering
基金
河北省自然科学基金资助项目( 594 0 84 )
