Effects of Si addition on the glass-forming ability, glass transition and crystallization behaviors of Ti40Zr10Cu36Pd14 bulk glassy alloy |
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Authors: | SL Zhu XM Wang FX Qin M Yoshimura A Inoue |
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Affiliation: | aInstitute for Materials Research, Tohoku University, Sendai 980-8577, Japan bMaterials and Structures Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan |
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Abstract: | The effects of small amounts of Si on the glass-forming ability, glass transition and crystallization behaviors of a Ti40Zr10Cu36Pd14 bulk glassy alloy were investigated. The addition of Si caused the decrease of glass-forming ability and the increase of the supercooled liquid region. The fragility of the alloys containing Si was higher than that of the Si-free alloy. In the glass transition process, both generation and annihilation of free volumes are suppressed by the addition of 1–3 at% Si. The activation energy for crystallization increases with increasing Si content, indicating the improvement of thermal stability. The crystallization structure of the alloys containing Si contents less than 4% consisted of six phases of CuTi2, Ti, Cu8Zr3, Cu4Ti3, TiZr and PdTi2. |
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Keywords: | B Glasses metallic B Thermal stability C Rapid solidification processing F Calorimetry F Diffraction |
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