Kinetics of the Glass Transition of the Zr41Ti14Cu12.5Ni1oBe22.5 Alloy Solidified in a Drop Tube

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2002,（8）
• 页码范围: 1148-1151
• 页数: 4页
• 分类号: O4
• 语种: 英文

摘要

Droplets of Zr41 Ti14Cu12.5Ni10Be22.5 glass-forming alloy with different sizes are solidified in a drop tube containerless process. The glass transition temperature Tg of Zr41 Ti14 Cu12.5Ni10Be22.5 glassy spheres solidified with different cooling rates is investigated by using a differential scanning calorimeter. It was found that all the amorphous spheres show an increase of Tg with the heating rate. The glassy spheres have a unique value for the glass transition activation energy E9 = 435.50 k J/mol, which is independent of cooling rate q. The insensitivity of Tg to q is interpreted by an extension of the free volume model for flow.