Effect of denucleating glass composition on undercooling of Fe83Ga17 alloy melts |
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| Authors: | Jiankun Zhou Jianguo Li |
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| Affiliation: | 1. Department of Materials Physics and Chemistry, Northeastern University, No.3-11, Wenhua Road, Shenyang, 110819, PR China;2. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, PR China;1. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, Liaoning 110870, China;2. Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, China;3. Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;4. School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo 315016, China;5. Center for Advanced Structural Materials, Department of Mechanical and Biomedical Engineering, College of Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong, China;1. Department of Material Forming and Control Engineering, College of Material and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, PR China;2. The State Key Laboratory of Rolling and Automation (RAL), Northeastern University, Shenyang 110819, PR China;3. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, PR China |
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| Abstract: | Adopting glass fluxing combined with superheating cycling method, the undercooling and its stability of Fe83Ga17 alloy melts were investigated using different kinds of denucleating glass: B2O3, 90% NaSiCa + 10% B2O3 (simplified as Na–Si–Ca–Al–B) and 70% Na–Si–Ca–Al–B + 30% Na2B7O4. The results showed that different glass has different denucleating mechanism. The purification of B2O3 glass is only a physical process, by which the stable bulk undercooling cannot be obtained during superheating–cooling cycles. While taking Na–Si–Ca–Al–B glass as purifying agent, its denucleating mechanism is a comprehensively physicochemical process. But the stability of undercooling is still undesirable because of the separation between melt and glass during cooling process in superheating cycling. A stable bulk undercooling can be obtained by physicochemical denucleating process in the case of 70% Na–Si–Ca–Al–B + 30% Na2B7O4 molten glass owing to its suitable viscosity. |
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