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Porous Titanium Parts Fabricated by Sintering of TiH2 and Ti Powder Mixtures

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Abstract

A new simple powder metallurgy process by sintering TiH2 powders was used to manufacture porous Ti components. The effects of the processing parameters (pressure of cold isostatic pressing and sintering temperature) and the TiH2/Ti ratio in the powder mixtures on the impurities, the linear shrinkage and the pore properties (including overall and open porosities) were comprehensively determined. The addition of TiH2 as a reactant has been found beneficial for the synthesis of porous Ti components. The formation mechanisms of pores were demonstrated based on the dehydrogenation process of TiH2 during sintering, resulting in highest reactivity due to the “in statu nascendi” generation of the metal. In addition, the hardness and corrosion resistance of all the sintered samples were evaluated, related to the overall and open porosities. As a result, an optimal composition of Ti-40 wt.% TiH2 was defined, as its maximum open porosity was about 23%.

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Reprinted from Peng et al. (Ref 27). Copyright (2016), with permission from Elsevier

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Acknowledgments

Q.P. gratefully acknowledges the support from the China Scholarship Council (File No. 2011689004). The Authors acknowledge the help of T. Schreiner, RWTH Aachen University, with operating the CIP machine and the help of C. Song, Shanghai University, with XRD measurements. The authors thank A.M. Khamoushkoo, RWTH Aachen University, for designing the gas tight container for the sintering process.

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Authors and Affiliations

  1. IME Process Metallurgy and Metal Recycling, RWTH Aachen University, Intzestr. 3, 52056, Aachen, Germany

    Qin Peng & Bernd Friedrich

  2. Institute of Physics, University of Rostock, Albert-Einstein-Str. 23-24, 18051, Rostock, Germany

    Bin Yang

  3. Competence Centre CALOR, Faculty of Interdisciplinary Research, University of Rostock, Albert-Einstein-Str. 25, 18051, Rostock, Germany

    Bin Yang

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  1. Qin Peng
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Correspondence to Qin Peng.

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Peng, Q., Yang, B. & Friedrich, B. Porous Titanium Parts Fabricated by Sintering of TiH2 and Ti Powder Mixtures. J. of Materi Eng and Perform 27, 228–242 (2018). https://doi.org/10.1007/s11665-017-3099-3

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