机械合金化与烧结制备ZrB_2-TiB_2复合粉末的研究  

Study on ZrB_2-TiB_2 Composite Powders Prepared By Mechanical Alloying and Sintering

作　　者：杨李安卓 董仕节[1,2] 罗平[2] 杨巍[1] 

机构地区：[1]湖北工业大学绿色轻工材料湖北省重点实验室,湖北武汉430068 [2]华中科技大学材料科学与工程学院,湖北武汉430074

出　　处：《热加工工艺》2015年第6期89-91,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(51375150)

摘　　要：以Zr、Ti、B为原料,先预球磨初始粉末,然后烧结制备ZrB2-TiB2复合粉末。采用X射线衍射仪和扫描电镜,分别对球磨和烧结后的粉末进行物相分析和显微结构观察。结果表明:原始粉末Zr、Ti、B按照摩尔比1:1:4混合,经机械球磨24 h后(球磨参数:大小球比1:2、球料比10:1进行配比,转速为500 r/min),球磨粉末除衍射峰向非晶化转变外,并未产生目标产物;将球磨粉末进行高纯氩气保护烧结到1500℃,保温2 h,可制备出含有较少杂质的ZrB2-TiB2复合粉末。ZrB2-TiB2 composite powders were fabricated by sintering process after ball milling of Zr,Ti and B powders.The microstructure of the ball-milled powder mixtures and composite powders were characterized by scanning electron microscopy and X-ray diffraction.The results show that the original powders Zr,Ti,B in a molar ratio of 1：1：4 are mixed,the diffraction peaks of the ball-milled powder mixtures can not produce the desired product in addition to amorphous transition（the parameters of milling：different ball weight ratio of 1：2,ball to powder mass ratio of 10：1,speed of 500 r/min）.Sintering the milled powders of high purity argon to 1500 ℃ and incubated 2 h,ZrB2-TiB2 composite powders containing fewer impurities can be prepared.

关 键 词：ZrB2-TiB2复合粉末 机械合金化 烧结 

分 类 号：TQ174.75[化学工程—陶瓷工业]