三元硼化物AlMgB_(14)超硬材料的研究进展  

Research Progress of AlMgB_(14) Super-hard Materials

作　　者：杨芳[1] 闫果[2] 李少强[2] 李成山[1,3] 熊晓梅[1] 王庆阳[1] 刘国庆[1] 冯建情[1] 

机构地区：[1]西北有色金属研究院,陕西西安710016 [2]西部超导材料科技股份有限公司,陕西西安710018 [3]宝胜集团有限公司,江苏扬州225800

出　　处：《稀有金属材料与工程》2016年第4期1088-1092,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51302226;51372207);国家重点基础研究发展计划("973"计划)(2011CBA00104);陕西省自然基金项目(2014JQ6198);江苏省"双创计划"人才资助课题

摘　　要：AlMgB_(14)超硬材料具有高硬度、低密度、低摩擦系数、高热稳定性和良好的热电性能,可以应用于耐磨、切削装备、微器件和微电子机械装置的保护涂层等领域。本文介绍了目前制备AlMgB_(14)超硬材料的几种方法,详细介绍了通过分步反应法在常压条件下合成AlMgB_(14)超硬材料。首先,均匀混合Mg粉、Al粉、B粉和不同含量的Ti粉,在850℃密闭氩气条件下烧结2 h,得到Al和Ti掺杂的MgB_2块体;第二步在真空条件下1050℃下烧结0.5 h得到目标产物AlMgB_(14)-TiB_2。微观结构显示AlMgB_(14)晶粒细小,在晶界处有均匀细小的TiB_2颗粒弥散分布。还介绍了AlMgB_(14)块体和薄膜的研究现状,论述了AlMgB_(14)超硬材料未来的研究重点。AlMgB14 super-hard materials can be applied in some fields such as wear-resistant, self-lubricating and protective coatings for cutting tools and protective coatings for micro devices and micro electromechanical components, due to their extremely high hardness, low density, high thermal stability and desirable thermoelectric properties. In the present paper, we introduced some methods for preparing AlMgB14 super-hard materials. Detailed techniques about AlMgB14 disks synthesis at ambient pressure through a two-step heat treatment were introduced. In the first step, Mg B2 disks doped with Al and Ti were fabricated through composition of uniformly mixed Mg, B, Al powders and Ti powder of different contents in the form of pressed disks heated at 850 °C for 2 h in closed argon atmosphere. And in the second step, target AlMgB14-TiB2 disks were obtained after sintering the MgB_2 disks at 1050 °C for 0.5 h in vacuum. The microstructure images show that the grain size of AlMgB14 is fine and the nano-scale TiB2 particles as the second phase induced by Ti doping are uniformly distributed at the grain boundaries. The research status on bulk and film of AlMgB14 and the future researching scope of AlMgB14 were also presented.

关 键 词：AlMgB14 超硬材料 研究进展 

分 类 号：TQ163[化学工程—高温制品工业]