Excessively High Vapor Pressure of Al-Based Amorphous Alloys

Metals

Jae Im Jeong¹  Sung Hyuk Lee¹  Je-Beom Jeon²  Suk Jun Kim¹ 

[1]School of Energy, Materials and Chemical Engineering, Korea University of Technology and Education (KOREATECH), Cheonan 31253, Korea

关键词: amorphous alloy;    metallic glass;    vapor pressure;    glass forming ability;   

DOI  :  10.3390/met5041878

来源: mdpi

【 摘 要 】

Aluminum-based amorphous alloys exhibited an abnormally high vapor pressure at their approximate glass transition temperatures. The vapor pressure was confirmed by the formation of Al nanocrystallites from condensation, which was attributed to weight loss of the amorphous alloys. The amount of weight loss varied with the amorphous alloy compositions and was inversely proportional to their glass-forming ability. The vapor pressure of the amorphous alloys around 573 K was close to the vapor pressure of crystalline Al near its melting temperature, 873 K. Our results strongly suggest the possibility of fabricating nanocrystallites or thin films by evaporation at low temperatures.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.