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Titanium(Ti)and nickel(Ni)elemental powders were blended by ball milling and the ball milled powders were employed to fabricate TiNi shape memory alloy(SMA)foams by spacer sintering.Effect of ball milling time on phase constitutes of the sintered TiNi alloy foams was studied by X-ray diffraction(XRD)analysis.Scanning electron microscopy(SEM)was used to characterize the porous structure,and compressive tests were carried out to evaluate the mechanical properties of the foams.Results indicate that porosities of the TiNi alloy foams can be controlled by using the spacer sintering method,and the porosities show a significant effect on the mechanical properties and shape memory effect(SME).
Titanium (Ti) and nickel (Ni) elemental powders were blended by ball milling and the ball milled powders were employed to fabricate TiNi shape memory alloy (SMA) foams by spacer sintering. Effect of ball milling time on phase formed of sintered TiNi alloy foams was studied by X-ray diffraction (XRD) analysis. Scanning electron microscopy (SEM) was used to characterize the porous structure, and compressive tests were carried out to evaluate the mechanical properties of the foams. Results indicate that porosities of the TiNi alloy foams can be controlled by using the spacer sintering method, and the porosities show a significant effect on the mechanical properties and shape memory effect (SME).