Al_2O_3/Al复合材料的制备及性能研究  

Study on Preparation and Properties of Al_2O_3/Al Composite

作　　者：侯铁翠[1] 韩东方[2] 郑英姿[1] 张锐[1] 卢红霞[1] 

机构地区：[1]郑州大学材料科学与工程学院,河南郑州450001 [2]郑州大学综合设计研究院,河南郑州450002

出　　处：《郑州大学学报（工学版）》2008年第3期19-22,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省基础研究资助项目(072300440070);河南省科技攻关资助项目(0624250013)

摘　　要：采用非匀相沉淀法制备纳米Al2O3包裹Al复合粉体,通过热压烧结制备出Al2O3/Al复合材料,利用差热分析仪、SEM、数显维氏硬度计及万能试验机测试研究了复合材料的微观结构及热力学性能.结果表明,经1 050℃/30 min煅烧后获得的复合粉体成分为α-Al2O3和Al;同单相Al2O3相比,纳米Al的添加降低了瓷体的烧结温度;添加Al的摩尔数分数为10%的Al2O3/Al复合陶瓷的抗弯强度提高10%,断裂韧性提高了86%,硬度值随Al的增加而下降.Al2O3/Al composite materials were synthesized with wet method and hot -pressing. Thermodynamic characteristics, microstructure and mechanical properties of the composite were studied with DSC/TG, SEM, microscope hardness tester and universal testing machine. The results show that α - Al2O3 and Al composite powders were got after being sintered at 1 050 ℃ for 30 minutes. Compared with the monolithic alumina, the Al2O3/Al cermet had a lower densification temperature. The bending strength and fracture toughness of the hot- pressing Al2O3/Al ceramic were greatly enhanced by 10% and 86%. However, the hardness of the composite decreased with the increase of aluminum content.

关 键 词：氧化铝 铝 增韧 复合材料 

分 类 号：TB34[一般工业技术—材料科学与工程]