Al-Mg系多孔材料的烧结工艺与显微组织研究  

Sintering process and microstructure of Al-Mg porous material

作　　者：田开文[1] 张文兴[2] 王润珍 尚福军[1] 冯宏伟[1] 

机构地区：[1]中国兵器科学研究院宁波分院,浙江宁波315103 [2]西安工业大学,陕西西安710032 [3]内蒙古第一机械集团公司第六分公司,内蒙古包头014032

出　　处：《兵器材料科学与工程》2011年第5期18-21,共4页Ordnance Material Science and Engineering

基　　金：宁波市自然科学基金(2009A610019)

摘　　要：利用自主研制的原位烧结系统,采用低温反应自熔工艺制备孔缘强化的细微孔径Al-Mg金属多孔材料,并对烧结工艺、显微组织进行研究。结果表明：在437~462℃范围内烧结能得到孔洞结构,但是孔洞体积小、形状不规则,材料的孔隙度也低;超过462℃后得到的孔洞体积较大,孔缘周围生成含Al3Mg2金属间化合物相的强化层;孔洞的数量主要由镁含量决定,而孔洞的大小主要由烧结温度、时间及镁颗粒的大小决定。Self-developed in-situ sintering system was adopted to prepare Al-Mg porous materials.The porous materials with strengthened pore wall were self-sintered at low temperature.The study of sintering process and microstructure observation show that the small pore structure with irregular shape is obtained at sintering temperature of 437-462 ℃;With temperature increasing above 462 ℃,the big pore structure with its pore wall strengthened by Al3Mg2 intermetallic composite phase can be achieved.The amount of pore is based on the addition amount of magnesium and the size of pore is determined by sintering temperature,time and magnesium powder size.

关 键 词：多孔材料 烧结 组织 

分 类 号：TG146.21[一般工业技术—材料科学与工程]