%0 journal article
%@ 0032-5899
%A Zhao, D.,Chang, K.,Ebel, T.,Qian, M.,Willumeit, R.,Yan, M.,Pyczak, F.

%D 2014
%J Powder Metallurgy
%N 1
%P 2-4 
%R doi:10.1179/0032589914Z.000000000153
%T Titanium carbide precipitation in Ti–22Nb alloy fabricated by metal injection moulding
%U https://doi.org/10.1179/0032589914Z.000000000153
1 
%X Metal injection moulding was applied to fabricate Ti–22Nb alloy as a low modulus material for biomedical applications. Tensile test specimens were injection moulded, followed by debinding and sintering. Sintering was at 1500°C for 4 h under vacuum (10–3 Pa). Selected as-sintered Ti–22Nb samples were hot isostatically pressed at 915°C/100 MPa for 2 h. The nature of the titanium carbide precipitates in the as-sintered Ti–22Nb alloy was investigated. Selected area electron diffraction patterns revealed that the carbides are Ti2C with a fcc structure. The calculation of the phase diagram showed a significant decrease of carbon solubility in Ti–22Nb compared with that in Ti from 500 to 1500 °C, contributing to the carbide precipitation in Ti–22Nb. Due to the carbide precipitation, the as-hipped Ti–22Nb alloy exhibited higher tensile strength but lower elongation than conventionally processed Ti–22Nb.