Glass formation and non-isothermal crystallization of Zr62.5Al12.1Cu7.95Ni17.45 bulk metallic glass |
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| Authors: | WK An AH Cai JH Li Y Luo TL Li X Xiong Y Liu Y Pan |
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| Institution: | aDepartment of Mechanical and Electrical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, PR China;bState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, PR China;cCollege of Materials Science and Engineering, Southeast University, Nanjing 211189, PR China |
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| Abstract: | Glass forming ability (GFA) and non-isothermal crystallization kinetics of Zr62.5Al12.1Cu7.95Ni17.45 bulk metallic glass were investigated. Its critical dimension is up to 7.5 mm and its critical cooling rate is less than 40 K s−1, indicating its better GFA. It manifests two crystallization procedures and the second crystallization peak is more sensitive to heating rate than the first crystallization peak. The glass transition and crystallization both have remarkable kinetics effects. The apparent activation energies derived from the Kissinger plots are 175.24 ± 27.59 KJ mol−1 for glass transition Eg, 212.84 ± 15.84 KJ mol−1 for onset crystallization Ex, 230.51 ± 23.85 KJ mol−1 for the first crystallization peak Ep1 and 124.85 ± 15.15 KJ mol−1 for the second crystallization peak Ep2. |
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| Keywords: | Amorphous metals Metallic glasses Crystallization Glass formation Thermodynamics |
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