Powder injection moulding of titanium from TiH2 powders

Contact   Carreño-Morelli Efraín
Title   Powder injection moulding of titanium from TiH2 powders
Author(s)   Carreño-Morelli E., Krstev W., Romeira B., Rodríguez-Arbaizar M., Bidaux J.-E., Zachmann S.
References   Proc. of European Powder Metallurgy Conference Euro PM2009, Copenhagen, Denmark, October 12-14, 2009, Vol.2, pp. 9-14
Abstract   Titanium parts have been processed from feedstocks composed of titanium hydride powders, low density polyethylene, paraffin wax and stearic acid. A two-step debinding process has been used, which consists of solvent debinding in heptane at 50°C followed by thermal debinding at 500°C. Sintering was performed at 1200°C. Both thermal debinding and sintering were performed under protective atmosphere in a MIM furnace equipped with molybdenum heating elements and a debinding retort. Special care in powder handling, feedstock preparation, debinding and sintering atmospheres, allowed to limit the residual oxygen, nitrogen and carbon contents, which were determined by quantitative analysis. The mechanical properties of net shape sintered parts were measured by tensile tests. A tensile strength of 580 MPa and an elongation of 1.8% were obtained. Experimental watch bracelet segments were injection moulded, showing good shape preservation and reproducibility.
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