成分调制对锆基块体非晶合金力学性能的影响  

Influence of composition modulation on the mechanical properties of Zr-based bulk metallic glasses(BMGs)

作　　者：花能斌[1,2] 陈文哲[1,2] 黄东亚[3] 

机构地区：[1]福州大学材料科学与工程学院,福建福州350116 [2]福建工程学院材料科学与工程学院,福建福州350108 [3]中国船舶重工集团公司第七二五研究所厦门材料研究院,福建厦门361006

出　　处：《福州大学学报（自然科学版）》2014年第4期628-632,共5页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省科技厅产学合作重大专项基金资助项目(2010H6001);福建省自然科学基金资助项目(2014J05053);福建省教育厅科研类基金资助项目(JA13224);福州大学博士后科研启动基金资助项目(0180-601017)

摘　　要：研究了Zr-Al-Ni-Cu块体非晶合金中Zr元素含量变化对合金力学性能的影响.利用X射线衍射仪和透射电子显微镜表征合金的结构;利用差示扫描量热仪研究非晶合金的热学性能;采用万能试验机测试材料的压缩力学性能;采用扫描电子显微镜观察压缩变形后试样的剪切带形貌.研究结果表明:随着Zr元素的摩尔分数从66%增加到70%,压缩塑性变形量从3%提高到11%,合金表面的剪切带密度明显增大,非晶合金的塑性变形能力提高.随着Zr元素含量的增加,非晶合金的弛豫热明显增大,自由体积含量增多,有利于多重剪切带的形成,从而增大了合金的塑性变形能力.In this study, the influence of the content of Zr element on the mechanical properties of Zr - A1 - Ni - Cu bulk metallic glasses （BMGs） was investigated. X - ray diffraction and transmission electron microscope were carried out to characterize the structure of alloys. The thermal properties were examined by a differential scanning calorimeter. Mechanical testing machine was performed to evaluate the compression mechanical properties. The morphology of the shear bands on the surface of deformed samples was observed by a scanning electron microscope. The results showed that with the increase in the content of Zr element from 66% to 70%, the compressive plastic strain enhanced from 3% to 11%, and the density of shear bands on the samples surface significantly increased, indicting the im- provement of plasticity of metallic glasses. With the increase in the content of Zr element, the relaxa- tion heat obviously enlarged, indicating the increment of free volume, which was attributed to the en- hancement of plasticity.

关 键 词：块体非晶合金 锆合金 力学性能 剪切带 自由体积 

分 类 号：TB31[一般工业技术—材料科学与工程]