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熔体过热水平对Cu36Zr48Ag8Al8块体非晶合金热稳定性和力学性能的影响

Effect of Overheated Level on Thermal Stability and Mechanical Properties of Cu36Zr48Ag8Al8 Bulk Metallic Glass

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【作者】 赵燕春寇生中王仁军索红莉丁雨田李娜薛书微刘广桥

【Author】 Zhao Yanchun1, Kou Shengzhong1,2, Wang Renjun1, Suo Hongli2, Ding Yutian1, Li Na1, Xue Shuwei1, Liu Guangqiao1 (1. State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, China) (2. The Key Laboratory of Advanced Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100022, China)

【机构】 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北京工业大学国家教育部功能材料重点实验室

【摘要】 熔体过热度对Cu36Zr48Ag8Al8块体非晶合金的热稳定性和力学行为有显著影响。高的过热水平制备非晶合金的比热容大,初始缺陷密度小,热稳定性高。过热度越小,压缩塑性越小;抗压强度和维氏硬度随着过热度的减小先增加后下降。自由体积和残余应力共同影响不同吸铸电压制得非晶合金的力学性能。

【Abstract】 Overheating has a pronounced effect on the thermal stability and mechanical properties of Cu36Zr48Ag8Al8 bulk metallic glass. Higher overheated temperature can enhance the thermal stability of bulk amorphous alloys, corresponding to higher specific-heat capacity and smaller initial defect concentration. Bulk amorphous alloys exhibit good compressive plasticity at small overheated levels, whereas the compressive fracture strength and microhardness show a significant increase followed by a slight decrease. The mechanical properties of bulk metallic glasses fabricated by different casting process are influenced by the interaction of the free volume and residual stresses.

【基金】 国家自然科学基金(50371016);国家自然科学基金委中-英国际合作与交流基金(50611130629)
  • 【文献出处】 稀有金属材料与工程 ,Rare Metal Materials and Engineering , 编辑部邮箱 ,2011年01期
  • 【分类号】TG139.8
  • 【被引频次】2
  • 【下载频次】286
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