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Microstructure and tensile properties of Mo alloy synthetically strengthened by nano-Y2O3 and nano-CeO2

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Abstract

Nano-Y2O3 and nano-CeO2 of different weight ratio mixed with deionizing water were doped into MoO2 powder by liquid–solid doping method. The diameter 1.80 and 0.18 mm alloy wires of Mo–0.3Y, Mo–0.3Ce, and Mo–0.15Y–0.15Ce were prepared through reduction, isostatic pressing, sintering, and drawing. Tensile properties, second phase microstructure and fracture surface appearance of wires were analyzed. The better refining effect for Mo alloy powder can be gotten after two kinds of nanoparticle oxide doped into MoO2 than only one doped. Nano-Y2O3 and nano-CeO2 have different influences on sintering process. For nano-CeO2, the constraining effect of grain growth focuses on the initial sintering stage, nano-Y2O3 plays refining grains roles in the later densification stage. Nano-Y2O3 is undistorted and keeps intact in the process of drawing; and nano-CeO2 is elongated and broken into parts in the drawing direction. The strengthening effect of nano-Y2O3 and nano-CeO2 keeps the finer grains and superior tensile properties for Mo–0.15Y–0.15Ce wire.

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Acknowledgments

This project was financially supported by the National Tungsten and Molybdenum Value-added Utilization Technology Industry Development (No. 2012BAE06B02) and Shanxi Province Science and Technology Innovation Plan (No. 2012KTCQ01-08).

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Authors and Affiliations

  1. Institute of Metallurgy, Xi’an University of Architecture and Technology, Xi’an, 710055, China

    Ren-Zhi Liu & Kuai-She Wang

  2. Laboratory of Molybdenum Metal and Its Processing, Jinduicheng Moly Co., Ltd, Xi’an, 710075, China

    Ren-Zhi Liu, Peng-Fa Feng, Qin-Li Yang & Hu Zhao

  3. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, 710049, China

    Geng An

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  1. Ren-Zhi Liu
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Correspondence to Ren-Zhi Liu.

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Liu, RZ., Wang, KS., Feng, PF. et al. Microstructure and tensile properties of Mo alloy synthetically strengthened by nano-Y2O3 and nano-CeO2 . Rare Met. 33, 58–64 (2014). https://doi.org/10.1007/s12598-013-0120-3

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  • DOI: https://doi.org/10.1007/s12598-013-0120-3

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