论文部分内容阅读
采用Zr、Ti、B为原料(摩尔比:1:1:4),在氩气气氛保护下,采用机械合金化方式,在球料比10:1、球磨转速500 r/min实验条件下制备了纳米结构的ZrB_2-TiB_2。采用X射线衍射仪(XRD)、场发射扫描电镜(FESEM),透射电镜(TEM)仪器,对不同球磨时间粉末的相组成、微观结构进行了表征。结果发现,原始粉末经120 h球磨后,粉末主要由ZrB_2和TiB_2组成,平均尺寸在20 nm左右,TiB_2分布于ZrB_2基体上。文章还探讨了该体系获得目标产物的机械合金化机制。
Using Zr, Ti and B as raw materials (molar ratio: 1: 1: 4), under the protection of argon atmosphere, mechanical alloying method was used to prepare ball materials with ratio of 10: 1 and milling speed of 500 r / min The nanostructured ZrB 2 -TiB 2. The phase composition and microstructure of powders were characterized by XRD, FESEM and TEM. The results show that the powders are mainly composed of ZrB 2 and TiB 2 after 120 h ball milling, the average size is about 20 nm and TiB 2 is distributed on the ZrB 2 matrix. The article also discusses the mechanical alloying mechanism of the system to obtain the target product.