Fe_3Al基摩擦材料的烧结致密化过程研究  

Research on Sintering Densification of Fe_3Al-based Friction Materials

作　　者：李静[1] 尹衍升 刘英才[2] 林晓娟[1] 孔英[1] 

机构地区：[1]山东建筑大学材料科学与工程学院,山东济南250101 [2]中国海洋大学材料科学与工程研究院,山东青岛266003

出　　处：《热加工工艺》2006年第22期1-4,共4页Hot Working Technology

基　　金：教育部博士点基金资助项目(20020422001);山东省重点基金资助项目(Z2002F02)

摘　　要：利用热压烧结方法制备了以Fe3Al金属间化合物为基体,以Cu、石墨、MoS2、Al2O3为添加剂的一种复合摩擦材料,并对其烧结致密化过程以及影响因素进行了试验研究。结果表明,材料的致密化过程受到原始粉料组成、粒度以及烧结工艺参数(如烧结温度、压力、保温时间)等多种因素的共同影响,其中Cu的液相烧结在材料致密化过程中起到重要作用。最佳工艺参数为:烧结温度1 050￣1 100℃,压力10￣12 MPa,保压20￣30 min,保温45￣60 min,此时致密度为90%￣95%。烧结过程中未发现晶粒异常长大,经1 050℃烧结1 h的摩擦材料中Fe3Al的晶粒尺寸为400￣600 nm。FerAl-based friction materials with the addition of Cu, graphite, MoS2 and Al2O3 were prepared by hot-pressed sintering method, The sintering densification course and its affecting factors were studied. The results show that the densification course is affected by the component of original powders, particle size and processing parameters such as sintering temperature, pressure and holding time, among which the liquid phase sintering of Cu phase plays an important role. The optimal parameters are as follows： sintering temperature 1050-1100℃, pressure 10-12 MPa, holding time of pressure 20-30 min, holding time of temperature 45-60 min, with the density of 90%-95%. No abnormal grain growth is found during the sintering process. The matrix grain size of FerAl-based friction materials sintered at 1050℃ for lh is 400.600 nm.

关 键 词：FE3AL 摩擦材料 烧结 致密化 

分 类 号：TF124[冶金工程—粉末冶金]