Posted: Jul 23, 2016 2:33 pm
by Calilasseia
The full scientific paper is a free download from the journal here ...

High Hardness In The Biocompatible Intermetallic Compound βTi3Au by Eteri Svanidze, Tiglet Besara, M. Fevsi Ozaydin, Chandra Sekhar Tiwary, Jiakui K. Wang, Sruthi Radhakrishnan, Sendurai Mani, Yan Xin, Ke Han, Hong Liang, Theo Siegrist, Pulickel M. Ajayan & E. Morosan, Science Advances, 2(7): e1600319 (20th July 2016) DOI: 10.1126/sciadv.1600319

Svanidze et al, 2016 wrote:The search for new hard materials is often challenging, but strongly motivated by the vast application potential such materials hold. Ti3Au exhibits high hardness values (about four times those of pure Ti and most steel alloys), reduced coefficient of friction and wear rates, and biocompatibility, all of which are optimal traits for orthopedic, dental, and prosthetic applications. In addition, the ability of this compound to adhere to ceramic parts can reduce both the weight and the cost of medical components. The fourfold increase in the hardness of Ti3Au compared to other Ti–Au alloys and compounds can be attributed to the elevated valence electron density, the reduced bond length, and the pseudogap formation. Understanding the origin of hardness in this intermetallic compound provides an avenue toward designing superior biocompatible, hard materials.