物理学报2013，Vol.62Issue(1)：303-309,7.DOI:10.7498/aps.62.016101
1at％ Ag替代Zr57Cu20Al10Ni8Ti5金属玻璃中各组元对玻璃形成能力及热稳定性的作用分析
On glass forming ability and thermal stability of Zr57Cu20Al10Ni8Ti5 bulk metallic glass by substituting each component with 1 at％ Ag
摘要
Abstract
Each component element of Zr57 Cu20 Al10 Ni8 Ti5 bulk metallic glass is substituted by 1 at% Ag element. Variations of glass forming ability and thermal-stability are studied using differential scanning calorimetry which gives the thermal-dynamic parameter of the bulk metallic glass, combined with X-ray diffraction of different diameter rods (Φ8, Φ10 and Φ12) which are prepared by copper mould suction casting, The results show that the glass forming ability and thermal-stability are greatly improved by substituting Ti element and the critical cooling rate is significantly reduced. While, no obvious law is found when substituting other elements. By analyzing the relevant data on glass forming ability, Inoue's atomic size rule show inconformity in this work, however, the mixing enthalpy rule dose not show conformity obviously. By calculating the packing density, we find that the packing density is obviously improved when substituting 1 at% Ti with Ag. Dynamic analysis is used and the mechanism of element substitution is also investigated on the aspects of crystallization activation energy and crystallization rate constant.关键词
元素替代/大块金属玻璃/玻璃形成能力/热稳定性Key words
element substitution/ bulk metallic glass/ glass forming ability/ thermal stability引用本文复制引用
崔晓,徐保臣,王知鸷,王丽芳,张博,祖方遒..1at％ Ag替代Zr57Cu20Al10Ni8Ti5金属玻璃中各组元对玻璃形成能力及热稳定性的作用分析[J].物理学报,2013,62(1):303-309,7.基金项目
国家自然科学基金(批准号:50971053)和国家重点基础研究发展计划(批准号:2012CB825702)资助的课题. （批准号:50971053）
