球磨工艺对ZrMgMo3O12/2024Al微观组织和性能的影响  

Effects of Ball Milling Process on the Mechanical Properties and the Coefficient of Thermal Expansion of 2024Al Composites Reinforced with Negative Expansion Ceramics ZrMgMo_3O_(12)

作　　者：王磊 杨俊瑞 刘忠侠 杨瑞宾 邵文龙 陈亚东 曹彦吉 Wang Lei;Yang Junrui;Liu Zhongxia;Yang Ruibin;Shao Wenlong;Chen Yadong;Cao Yanji(College of Physics and Engineering,Key Laboratory of Materials Physics of Ministry of Education,Zhengzhou University;School of Software and Applied Science and Technology,Zhengzhou University;Xuzhou Zhong＇an Science ＆ Technology Co.,Ltd.)

机构地区：[1]郑州大学物理工程学院材料物理教育部重点实验室 [2]郑州大学软件与应用科技学院 [3]徐州中安科技股份有限公司

出　　处：《特种铸造及有色合金》2018年第8期894-898,共5页Special Casting & Nonferrous Alloys

摘　　要：采用球磨混合ZrMgMo_3O_(12)粉与2024Al粉,制备了ZrMgMo_3O_(12)体积分数为10%的2024Al复合材料。并用SEM、XRD、维氏硬度计和热膨胀仪研究球磨工艺对复合材料的微观组织、硬度和热膨胀性能的影响。结果表明,随着球磨转速的增加或球磨时间的延长,ZrMgMo_3O_(12)颗粒在Al基体上趋向均匀分布,并与基体结合良好。这有利于ZrMgMo_3O_(12)的弥散强化,还改善了ZrMgMo_3O_(12)颗粒与基体界面间的载荷传递能力,增加了ZrMgMo_3O_(12)与2024Al基体间热膨胀系数的叠加效果,有利于降低复合材料的热膨胀系数。当球磨转速为200r/min、球磨4h时制备的复合材料硬度高于2024Al合金,热膨胀系数明显低于2024Al合金。The ZrMgMo3O12/2024 Al composites with 10% ZrMgMo3O12 in volume fraction were prepared through mixing 2024 Al powder and ZrMgMo3O12 powder with various milling time and milling speed.The microstructure,hardness and coefficient of thermal expansion（CTE）of composites were investigated using SEM,XRD,Vickers hardness tester and dilatometer,respectively.The results reveal that with increasing in milling rate and milling time,the ZrMgMo3O12 particles are distributed uniformly inα-Al matrix with excellent bonding,which are beneficial to the dispersion strengthening effect of ZrMgMo3O12 particles to Al matrix and improvement of the mechanical properties as well as improvement of the interfacial load transfer capacity on the interface of ZrMgMo3O12/Al matrix.Finally,the superposed effect of the coefficient of thermal expansion of ZrMgMo3O12 and 2024 Al is increased and the thermal expansion of composites is decreased.Therefore,the 10% ZrMgMo3O12/2024 Al composites fabricated with milling rate of 200 r/min for 4 hhas not only higher than that of 2024 Al in hardness,but also the lowest CET（16×10-6 K-1）.

关 键 词：负膨胀ZrMgMo3O12陶瓷 2024AL复合材料 球磨工艺 硬度 

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