Effect of Nb Content on Behavior of (Ti-Nb) Shape Memory Alloys for Biomedical Applications

Abstract

Titanium-niobium (Ti-Nb) binary alloys have lately been given attention and attraction due to their non-toxic properties and low Young's modulus. All alloys manufactured by powder metallurgy and studied through the influence of Nb content (13, 14, 15, 23, 24 and 25) at% on the shape memory effect, the surfaces properties (Vickers microhardness, Contact angle (CA), Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD), DSC and Corrosion resistance (in Hank solution) of Ti-xNb alloys). The results of XRD illustrated that the (Ti-xNb) alloys included α″ and β Ti phases, such that as the amount of Nb in the alloy increased the β phase increased proportionately. Regarding the shape memory effect (SME%) of alloys, the treatment was determined by using microhardness after and before the heat treatment, according to the result of DSC test, by two different temperature (50 and 150) ºC in which the result was far less than 5%.All Ti-xNb alloys displayed noticeably higher hardness, compressive strength and decreased contact angle, low Corrosion was founded on Ti-xNb alloys in hank solutions. In overall, binary Ti-xNb at% alloys are a suitable candidate for dental and orthopedic implants owing to their enhanced mechanical characteristic and Biological performance that is comparable.