点击次数：

论文类型：期刊论文

发表时间：2011-11-15

发表刊物：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录刊物：Scopus、SCIE、EI

卷号：528

期号：29-30

页面范围：8551-8556

ISSN号：0921-5093

关键字：Bulk metallic glasses; Zr-based alloys; Glass-forming ability; Mechanical properties; Corrosion resistance

摘要：The thermal stability, glass-forming ability (GFA), mechanical properties and corrosion resistance of Zr60Cu25-xAl15Nix (x = 0-25 at.%) bulk metallic glasses (BMGs) were systematically investigated. The additional Ni greatly enhances the thermal stability and GFA of BMGs. For alloy with x = 15, a fully glassy rod with a critical diameter up to 18 mm can be obtained by copper mold casting. In addition, the strength and plasticity of BMGs are effectively improved by adding Ni, and they show remarkable correlations with glass transition temperature and Poisson's ratio or GIB value, respectively. A Zr60Cu5Al15Ni20 BMG exhibits largest compressive plastic strain of 5.5%, yielding strength of 1755 MPa and Young's modulus of 83 GPa at ambient temperature. Moreover, the electrochemical potentiodynamic polarization curves demonstrate that replacement of Cu by Ni improves the corrosion resistance in chloride-ion-containing solutions significantly. (C) 2011 Elsevier B.V. All rights reserved.