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Role of yttrium in glass formation of Ti-based bulk metallic glasses

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Abstract

Starting with Zr of two different purities, Ti-based bulk metallic glasses (BMGs) with a nominal composition of Ti40Zr25Cu12Ni3Be20 were prepared. The effect of the addition of yttrium at levels of 0.2 at.%, 0.4 at.%, 0.5 at.%, 0.6 at.%, and 1 at.% on the glass forming ability (GFA) of the alloy has been investigated by means of metallography, X-ray diffraction, and differential scanning calorimetry. Experimental data indicates that high impurity content dramatically reduces the glass forming ability. Microalloying with 0.5 at.% Y is effective in suppressing the crystalline phase formation and alleviating the detrimental effect of oxygen in the low-purity alloy. On the contrary, in the alloy containing high-purity element, the effective yttrium addition is less than 0.4 at.%. The results indicate that the beneficial effect of the optimum dopants is mainly due to scavenging the oxygen impurity via the formation of innocuous phase.

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Authors and Affiliations

  1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China

    Guojian Hao, Fei Ren, Yong Zhang & Junpin Lin

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  1. Guojian Hao
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  2. Fei Ren
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  4. Junpin Lin
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Correspondence to Junpin Lin.

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Hao, G., Ren, F., Zhang, Y. et al. Role of yttrium in glass formation of Ti-based bulk metallic glasses. Rare Metals 28, 68–71 (2009). https://doi.org/10.1007/s12598-009-0013-7

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  • DOI: https://doi.org/10.1007/s12598-009-0013-7

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