Bulk metallic glass formation: The positive effect of hydrogen |
| |
Authors: | Yanqing Su Fuyu Dong Liangshun Luo Jingjie Guo Baoshuai Han Zhuoxi Li Baoyi Wang Hengzhi Fu |
| |
Institution: | 1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
| |
Abstract: | Zr55Cu30Ni5Al10 alloys with different amounts of hydrogen have been prepared by arc melting under the gaseous mixture of hydrogen and argon. Proper additions of hydrogen have been proved to effectively increase the glass-forming ability (GFA) of this alloy. Positive effect of hydrogen on GFA has been interpreted from the thermodynamic and structural points of view. Proper additions of hydrogen can decrease the liquidus temperature, which leads to more stable glass-forming liquid. Structure analysis by positron annihilation lifetime spectroscopy shows that proper additions of hydrogen can increase the concentration of shortest open volume and decrease the concentration of intermediate and largest open volumes. This leads to formation of a denser random packed structure, and thus increases the GFA of Zr55Cu30Ni5Al10 alloys. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|