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Powder metallurgical processing of Ni-Ti shape memory alloy

Research output: Contribution to Journal/MagazineJournal articlepeer-review

<mark>Journal publication date</mark>1997
<mark>Journal</mark>Powder Metallurgy
Issue number1
Number of pages5
Pages (from-to)43-47
Publication StatusPublished
<mark>Original language</mark>English


The near net shape production of homogeneous Ni-Ti intermetallic displaying good shape memory behaviour is attractive, particularly for potential biomaterials applications. This study investigates and characterises equiatomic Ni-Ti shape memory ahoy prepared by the compaction and sintering of elemental Ti and Ni powders. Phase development during sintering was determined using X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray analysis, and dimensional integrity of the compacts was monitored during sintering. The shape memory behaviour of the Ni-Ti compacts was assessed using differential scanning calorimetry. Employment of a combined solid state and liquid phase sinter cycle produced homogeneous Ni-Ti intermetallic containing 35% porosity and displaying shape memory transformation enthalpy similar to that of commercially produced wrought Ni-Ti material. (C) 1997 The Institute of Materials.