Effect of soaking time on the preparation of porous NiTi alloy during micro-forming fields activated sintering

Zhao, Dan and Yang, Yi and Liu, Jian and Yang, Gang and Qin, Yi and Yin, Deqiang; Qin, Y. and Dean, T.A. and Lin, J. and Yuan, S.J. and Vollertsen, F., eds. (2015) Effect of soaking time on the preparation of porous NiTi alloy during micro-forming fields activated sintering. In: 4th International Conference on New Forming Technology (ICNFT 2015). MATEC Web of Conferences . EDP Sciences, GBR. ISBN 9782759818235

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    Abstract

    In this study, porous NiTi alloys have been successfully produced by fields-activated micro-sintering and forming technology under the pressure of 75 MPa at 1100∘C. The effects of soaking time on the porous NiTi alloys were investigated by analysing porosities, microstructures, and phase compositions of the produced alloys. The porosities of 41.2%, 38.8% and 47.2% are achieved at the soaking time of 2 min, 6 min and 10 min respectively. SEM examinations show that the pore size is varied with the soaking time and X-ray diffraction studies reveal that the main phases are NiTi, Ni3Ti and NiTi2.