热压烧结Al-Bi复合水反应材料组织与反应活性研究  

Microstructure and Water Reactivity of Hot Pressing Sintered Al-Bi Composite Water-reactive Materials

作　　者：蔡怀建 宁先进[1] 于晓东[1] 赵修臣[1] 谭成文[1] 杨增林 Cai Huaijian;Ning Xianjin;Yu Xiaodong;Zhao Xiuchen;Tan Chengwen;Yang Zenglin(School of Materials Science and Engineering,Beijing Institute of Technology)

机构地区：[1]北京理工大学材料学院,北京100081

出　　处：《特种铸造及有色合金》2022年第11期1434-1439,共6页Special Casting & Nonferrous Alloys

摘　　要：以Al和Bi的机械混合粉为原料,采用热压烧结法制备了Al-15Bi复合水反应材料,对其微观结构、水反应性能及反应产物进行了分析表征。探讨了温度和KCl浓度对Al-15Bi与水反应速率的影响,探究了Al-15Bi的水反应机理,建立了反应模型。结果表明,在550℃、40 MPa下保温保压1 h可制备出组织致密且均匀的Al-15Bi复合材料,其中Bi以网状分布在Al颗粒界面处;提高温度能大幅提高材料的制氢速率;Al与Bi在水中能形成微型原电池,从而促进Al与水的反应。Al-15 Bi composite water-reactive materials were prepared by hot pressing sintering with mechanically mixed powder of Al and Bi as raw materials. The microstructure, water-reactive properties and reaction products of the materials were analyzed and characterized. The effects of temperature and KCl concentration on the reaction rate between Al-15 Bi and water were analyzed, meanwhile the water reaction mechanism of Al-15 Bi was explored, and the reaction model was established. The results indicate that the Al-Bi composite material with dense and uniform structure can be prepared at 550 ℃ and 40 MPa for 1 h. Bi in the material is distributed in a network at the interface of Al particles. The hydrogen production rate can be improved greatly by increasing the temperature. Al and Bi can form micro-galvanic cells in water, thereby promoting the reaction of Al and water.

关 键 词：Al-15Bi 水反应材料 微观组织 制氢性能 

分 类 号：TK91[动力工程及工程热物理] TB331[一般工业技术—材料科学与工程] TG146.21[金属学及工艺—金属材料]