| 异质结构Zr基非晶合金的热稳定性及力学性能 |
| |
| 引用本文： | 杨 超,李维火.异质结构Zr基非晶合金的热稳定性及力学性能[J].稀有金属材料与工程,2012,41(7):1196-1022. |
| |
| 作者姓名： | 杨 超 李维火 |
| |
| 作者单位： | 安徽工业大学,安徽 马鞍山,243002 |
| |
| 基金项目： | 国家自然科学基金（50701001）；安徽省自然科学基金重点项目（KJ2010A052） |
| |
| 摘 要： | 通过铜模铸造法制备了具有异质结构的Zr64.2Ni16.2Cu14.6Al5和Zr63.4Ni16.2Cu15.4Al5块体非晶合金,利用X射线衍射(XRD)、高分辨透射电镜(HRTEM)和差示扫描量热法(DSC)研究了其微观结构及热稳定性。结果表明,与均匀结构的Zr65Al10Ni10Cu15块体非晶合金相比,异质结构降低了材料的热稳定性。在单轴压缩试验中,两种Zr基块体非晶合金具有大的塑性应变(>25%)和高的屈服强度(>1.6GPa)。低的STZs势能和高的剪切带扩展抗力是异质结构Zr基块体非晶合金塑性提高的主要原因。
|
| 关 键 词： | 块体非晶合金 异质结构 热稳定性 大塑性 |
| 收稿时间： | 2011/7/27 0:00:00 |
Thermal Stability and Mechanical Properties of Zr-Based Amorphous Alloys with Heterogeneous Structures |
| |
| Yang Chao and Li Weihuo.Thermal Stability and Mechanical Properties of Zr-Based Amorphous Alloys with Heterogeneous Structures[J].Rare Metal Materials and Engineering,2012,41(7):1196-1022. |
| |
| Authors: | Yang Chao and Li Weihuo |
| |
| Affiliation: | Anhui University of Technology, Maanshan 243002, China |
| |
| Abstract: | The Zr64.2Ni16.2Cu14.6Al5 and Zr63.4Ni16.2Cu15.4Al5 bulk amorphous alloys with heterogeneous structures were prepared through copper mould casting. The microstructures and thermal stabilities of two Zr-based bulk amorphous alloys were investigated by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Compared with homogenous structure Zr65A10lNi10Cu15 bulk amorphous alloys, heterogeneous structure decreases alloy thermal stability. The two Zr-based bulk amorphous alloys exhibit large plastic strain (>25%) and high yield strength (>1.6 GPa) under uniaxial compression tests. The low potential-energy barrier of shear transition zones (STZs) and the high resistance of the shear bands propagation are regarded as the main reason of increasing of plasticity in the bulk amorphous alloy with heterostructure. |
| |
| Keywords: | bulk amorphous alloy heterogeneous structure thermal stability large plasticity |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
