Thermal expansion and relaxation-crystallization kinetics of metallic glass Co63Ni6Fe4V2Si10B15

✍ Scribed by G. M. Lin; J. K. L. Lai; G. G. Siu

• Publisher: Springer
• Year: 1993
• Tongue: English
• Weight: 460 KB
• Volume: 28
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00365186

✦ Synopsis

The conventional dilatometric technique is applied to study the thermal expansion of the metallic glass Co63(FeNi)1oV2SiloB 15 with cylindrical samples rolled from ribbon. The heatingrate effect on expansion and differential thermal analysis (DTA) is investigated. The non-linear region of the temperature variation curves of relative elongation all show a broad peak and a distinct peak which correspond to those in DTA. The broad peak in DTA resolves into two peaks: the first one is associated with the glass transition which is interpreted as a quasi-firstorder transformation. On comparing with X-ray diffraction analysis, the crystallization is determined to be a two-stage process in which Co(4F) precipitation is a controlling factor.