熔渗法制备Ti_3SiC_2陶瓷中硅的熔渗时间研究  

Infiltration time of Si during synthesising Ti_3SiC_2 ceramic by melt infiltration sintering method

作　　者：肖琪聃[1] 吕振林[1] 李阳[1] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《兵器材料科学与工程》2010年第6期33-36,共4页Ordnance Material Science and Engineering

基　　金：陕西省自然科学基金(2007E104);陕西省重点学科建设专项资金资助项目

摘　　要：以Ti/TiC/Si粉末为原料,采用液态熔渗硅方法制备出高纯的Ti3SiC2材料,并且从理论上推导液态熔渗硅方法制备Ti3SiC2陶瓷材料时熔渗时间与预制骨架高度之间的关系式,并通过熔渗实验进一步验证该关系式的可靠性。研究表明,熔渗时间随熔渗高度与熔渗温度的改变而变化。在保证毛细管力的前提下,毛细管半径越大,熔渗速度越快,熔渗时间越短。The high purity Ti3SiC2 ceramic was prepared by melt infiltration sintering method with Ti/TiC/Si mixed powders as raw material, and the relationship between infiltration time and the height of the prefabricated skeleton was studied, the reliability of the formula was verified by experiment. The results show that the infiltration time changes with the infiltration height and infiltration temperature. Under the premise of ensuring the capillary force, the bigger the capillary radius, the faster the infiltration rate and the shorter the infiltration time.

关 键 词：TI3SIC2 熔渗 熔渗时间 预制骨架 

分 类 号：TB331[一般工业技术—材料科学与工程]