Al-B体系相之间相互转化关系的研究  

Phase Transitions of the Al-B System

作　　者：熊晓梅[1] 杨芳[1] 王利军[2] 闫果[3] 王庆阳[1] 刘国庆[1] 冯建情[1] 李成山[1] 刘向宏[3] 冯勇[3] 

机构地区：[1]西北有色金属研究院,陕西西安710016 [2]东北大学,辽宁沈阳110004 [3]西部超导材料科技股份有限公司,陕西西安710018

出　　处：《稀有金属材料与工程》2014年第8期1881-1885,共5页Rare Metal Materials and Engineering

基　　金：国家重点基础研究发展规划("973"计划)(2011CB605904)

摘　　要：采用DSC和传统的粉末烧结法研究了Al-B体系的相转化,并采用XRD分析了样品物相组成,采用SEM分析了样品微观形貌,分析结果表明：烧结温度对AlB2相的分解有决定性影响,同时,保温时间对AlB2相的分解也有影响。在真空烧结条件下,要使AlB2相完全分解,1050℃下烧结3 h是最佳热处理工艺。采用两种单质直接化合生成AlB12相的反应是完全反应;即使是改变Al粉与AlB12粉的比例,在900~1150℃范围内烧结样品3 h,都不能使Al与AlB12发生反应。The phase transitions of the A1-B system were systematically explored by means of DSC and traditional solid-state reaction Phase and microstructures were characterized by X-ray diffraction （XRD） and scanning electron microscope （SEM）, respectively. The results show that the sintering temperature plays a decisive part in the decomposition of A1B2. At the same time, holding time also has an important influence on the decomposition of A1B2. A1B2 can decompose completely at 1050 ℃ for 3 h using the vacuum sintering method The formation reaction of AlB12 is a complete reaction. The reaction between Al and AlB12 can＇t take place regardless of stoichiometric Al/B heated in the range of 900 to 1150 ℃ for 3 h.

关 键 词：烧结工艺 AlB2 AlB12 合成 相转化 

分 类 号：TQ133.1[化学工程—无机化工] O642.42[理学—物理化学]