Biomedical TiNbZrTaSi alloys designed by d-electron alloy design theory

摘要

We report on the formation of ultrafine-grained (Ti_(69.71)Nb_(23.72)Zr_(4.83)Ta_(1.74))_(100-x)Si_x (at.%, x = 0, 2 and 5) alloys designed by d-electron alloy design theory and fabricated by spark plasma sintering of nanocomposite powder precursor. The designed and fabricated alloys exhibit a high yield and fracture strength of 1296 MPa and 3263 MPa along with an ultra-large fracture strain of 65% under compression. Meanwhile, they display low elastic modulus of 37-48 GPa. The high-performance titanium alloys without toxic elements show high potential for application as biomaterials.