Al-Zr-O体系熔体反应法合成复合材料的微观组织和拉伸性能  

Microstructure and Tensile Property of In-situ Composite Synthesized by the Direct Melt Reaction in the System Al-Zr-O

作　　者：赵玉涛[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《铸造》2002年第3期153-156,共4页Foundry

基　　金：国家经贸委项目 (992B0 0 0 7) ;江苏省应用基础研究基金项目 (BJ970 62 )

摘　　要：采用熔体反应法 ,以ZrO2 、ZrSiO4 和ZrOCl2 粉剂为反应物在熔融的铝 ( 85 0℃ )中成功制备了Al/ (Al3 Zr +Al2 O3 ) P 复合材料。扫描电镜 (SEM )和电子探针 (EPMA)分析表明 :Al Zr O体系反应生成的复合材料 ,颗粒尺寸细小 ,Al2 O3 为 1～ 3μm ,Al3 Zr小于 1μm ,且弥散分布于基体中。拉伸试验结果显示 :Al Zr O体系反应生成Al/ (Al3 Zr +Al2 O3 ) P 复合材料的抗拉强度和屈服强度较基体纯Al均显著提高。其中Al ZrOCl2 体系生成的复合材料的抗拉强度为14 8 7MPa ,屈服强度为 112 4MPa ,分别较基体纯Al提高了 93 6 %和 170 8%。A novel in-situ reaction system Al-Zr-O was developed. Al/(Al_3Zr+Al_2O_3)_P composite has been successfully fabricated by the direct melt reaction (DMR) between ZrO_2, ZrSiO_4, ZrOCl_2 and molten aluminum (850℃). With the help of scanning electron microscope (SEM) and electron probe micro-analyzer (EPMA), it is found that in-situ formed particles in the system Al-Zr-O are finer and are well distributed in the Al matrix. The maximum sizes of Al_2O_3 and Al_3Zr particulate are 3 μm and 1 μm respectively. Tensile test shows that the tensile strength and yield strength of Al/(Al_3Zr+Al_2O_3)_P composite are higher than that of the matrix Al. Furthermore, the tensile properties of Al/(Al_3Zr+Al_2O_3)_P composites synthesized by Al-ZrOCl_2 are σ_b =148.7MPa and σ _ 0.2 =112.4Pa, increased by 93.6% and 170.8% respectively as compared with that of the matrix Al.

关 键 词：微观组织 拉伸性能 Al-Zr-O体系 熔体反应法 铝基复合材料 

分 类 号：TB331[一般工业技术—材料科学与工程]