Abstract
High porosity and large pore size porous NiTi shape memory alloys were successfully fabricated by using pore-forming agent (NH4HCO3) and capsule-free hot isostatic pressing process. The porosity of the fabricated porous alloys increases linearly with addition of NH4HCO3 and reaches as high as nearly 50%, and the alloys show more uniform pore distribution with most pores larger than 300 μm.
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