Porous Titanium Parts Fabricated by Sintering of TiH{sub 2} and Ti Powder Mixtures

Journal Article · Mon Jan 15 04:00:00 EST 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-017-3099-3· OSTI ID:22860681

Peng, Qin ^[1]; Yang, Bin ^[2]; Friedrich, Bernd ^[1]

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1. RWTH Aachen University, IME Process Metallurgy and Metal Recycling (Germany)
2. University of Rostock, Institute of Physics (Germany)

A new simple powder metallurgy process by sintering TiH{sub 2} powders was used to manufacture porous Ti components. The effects of the processing parameters (pressure of cold isostatic pressing and sintering temperature) and the TiH{sub 2}/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 TiH{sub 2} 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 TiH{sub 2} 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.% TiH{sub 2} was defined, as its maximum open porosity was about 23%.

• OSTI ID: 22860681
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 1 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CORROSION RESISTANCE
DEHYDROGENATION
HARDNESS
POROSITY
POROUS MATERIALS
POWDER METALLURGY
SYNTHESIS
TITANIUM
TITANIUM HYDRIDES