铸造温度对Zr53.9Cu29.4Ni4.9Al9.8Fe2块体金属玻璃力学性能和组织的影响

稀有金属材料与工程, 2012, 41(11): 1891-1895.

铸造温度对Zr53.9Cu29.4Ni4.9Al9.8Fe2块体金属玻璃力学性能和组织的影响

刘广桥 ^1, , 寇生中 ^2, , 李春燕 ^3, , 赵燕春 ^4,

1.兰州城市学院,甘肃兰州730070 ;兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

2.兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

3.兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

4.兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

基金项目: National Natural Science Foundation of China (50371016)

关键词：块体金属玻璃 , 铸造温度 , 力学性能 , 组织

Effect of Casting Temperature on Mechanical Properties and Microstructure of Zr53.9Cu29.4Ni4.9Al9.8Fe2 Bulk Metallic Glass

Liu Guangqiao ^1, , Kou Shengzhong ^2, , Li Chunyan ^3, , Zhao Yanchun ^4,

1.兰州城市学院,甘肃兰州730070 ;兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

2.兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

3.兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

4.兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

Keywords： bulk metallic glass , casting temperature , mechanical properties , microstructure

在水冷铜坩埚中采用铜模吸铸法以不同的铸造温度制备出直径3mm的Zr53.gCu29.4Ni4.9Al9.sFe2合金试样,研究了铸造温度对锆基块体金属玻璃力学性能和组织的影响.研究结果表明,对于试样的非晶结构,存在一个临界铸造温度,低于此温度会有晶体相析出.在一定范围内提高铸造温度可以提高锆基块体金属玻璃的压缩断裂强度和轻微降低塑性.当铸造电压升高至9 kV时,不但可以提高合金试样的压缩断裂强度,同时提高其塑性,其塑性达到2.62％.通过控制与自由体积和残余应力相关的铸造温度,可以调节锆基块体金属玻璃的力学性能.

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