期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 132, 期 3, 页码 1645-1660出版社
SPRINGER
DOI: 10.1007/s10973-018-7050-0
关键词
Bulk metallic glass; Characteristic temperature; Glass-forming ability; Criterion
资金
- National Natural Science Foundation of China [51471139, 51071134]
- Natural Science Foundation of Hunan Province [12JJ2024]
- Postgraduate Research and Innovation Project of Hunan Province [CX2014B278]
A new criterion or parameter chi given by (wherein T (g) is the glass transition temperature, T (x) the onset crystallization temperature, T (l) the liquidus temperature or the offset temperature of melting and a a fitting exponent) has been suggested to predict the glass-forming ability (GFA) of bulk metallic glasses (BMGs). Regression analysis between the critical diameter D (max) and this criterion yielded a value of a = 1.47. There exists a linear relationship between chi and D (max) with a coefficient of determination R (2) = 0.43, and this correlation can be expressed by the approximation formula: . The comparisons of the chi parameter with the currently available parameters based on characteristic transformation temperatures of BMGs clearly confirmed that the new criterion exhibits the best ability for appraising the GFA of the alloys. Finally, evaluated glass-forming tendencies of four previously reported Zr-based BMGs using this chi parameter were compared with their corresponding experimental results.
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