原位合成TiB_2/Al_2O_3复相陶瓷显微组织的研究  

Study on Microscopic Structure of In-situ TiB_2/Al_2O_3 Composite Ceramic

作　　者：谢艳春[1] 崔洪芝[1] 袁建军[1] 

机构地区：[1]山东科技大学材料科学与工程学院,山东青岛266510

出　　处：《热加工工艺》2006年第22期23-24,72,共3页Hot Working Technology

基　　金：国家高技术研究发展计划(863)资助项目(2004AA420030)

摘　　要：采用自蔓延燃烧合成法在室温下的空气中制备出TiB2/Al2O3复相陶瓷,通过X射线衍射(XRD)和扫描电镜(SEM)分析表明:大部分TiB2的形貌为规则的块状,晶粒细小,平均尺寸为几个微米,但也出现了TiB2枝晶和棒状晶。而Al2O3的颗粒较大(10～40μm),形状不规则,Al2O3的断口呈层片状,Al2O3和TiB2出现聚集现象。TiB2 /Al2O3 composite ceramic was prepared by self-propagating combustion synthesis at room temperature.The analises by means of XRD and SEM show that the most particles of TiB2 are of regular rectangle shape and are fined,with the average size of micron meter orders,but some particles are tree-like and rod-like crystal.The sizes ofAl2O3 （10-40μm） are bigger than TiB2 and shape is not regular. The fracture ofAl2O3 is lamellar.The gathering phenomena of Al2O3 and TiB2 appeares.

关 键 词：复相陶瓷 TiB2/Al2O3 显微组织 

分 类 号：TB332[一般工业技术—材料科学与工程]