Effect of mechanical alloying and sintering process on microstructure and mechanical properties of Al-Ni-Y-Co-La alloy  

机械合金化和烧结工艺对Al-Ni-Y-Co-La合金显微组织及力学性能的影响(英文)

作　　者：原燕波 王志伟[1] 郑瑞晓 郝晓宁[1] Kei AMEYAMA 马朝利[1] 

机构地区：[1]北京航空航天大学,材料科学与工程学院,空天先进材料与服役教育部重点实验室,北京100191 [2]Department of Mechanical Engineering, Faculty of Science and Engineering, Ritsumeikan University

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第7期2251-2257,共7页中国有色金属学报（英文版）

基　　金：Project(2012CB619503)supported by the National Basic Research Program of China;Project(2013AA031001)supported by the National High Technology Research and Development Program of China;Project(2012DFA50630)supported by the International Science&Technology Cooperation Program of China

摘　　要：Al86Ni7Y4.5Co1La1.5 （mole fraction, %） alloy powder was produced by argon gas atomization process. After high-energy ball milling, the powder was consolidated by vacuum hot press sintering and spark plasma sintering （SPS） under different process conditions. The microstructure and morphology of the powder and consolidated bulk sample were examined by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. It is shown that amorphous phase appears when ball milling time is more than 100 h, and the bulk sample consolidated by SPS can maintain amorphous/ nanocrystalline microstructure but has lower relative density. A compressive strength of 650 MPa of Al86Ni7Y4.5Co1La1.5 nanostructured samples is achieved by vacuum hot extrusion （VHE）.通过气雾化方法制备Al86Ni7Y4.5Co1La1.5(摩尔分数,%)合金粉末。首先,将粉末进行不同时间的球磨,然后在不同的烧结温度及保压时间等条件下对粉末分别进行热压烧结和放电等离子烧结。通过X射线衍射仪(XRD),扫描电镜(SEM)以及透射电镜(TEM)对粉末和块体材料的显微组织和形貌进行表征。结果表明:在特定球磨参数下球磨100 h以上可以产生非晶,而且通过放电等离子烧结可以得到非晶/纳米晶块体材料,然而这种材料的相对密度较低。通过热压烧结可制备抗压强度为650 MPa的Al86Ni7Y4.5Co1La1.5纳米块体材料。

关 键 词：mechanical alloying aluminum alloy nanocrystalline alloy AMORPHOUS spark plasma sintering hot extrusion 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TF123.9[金属学及工艺—金属材料] TF124.5[金属学及工艺—金属学]