Surface Modification of Powder Metallurgy Titanium by Colloidal Techniques and Diffusion Processes for Biomedical Applications1 . Issue 6 (28th July 2016)

• Record Type: Journal Article
• Authors: Ureña, Julia; Mendoza, Carlos; Ferrari, Begoña; Castro, Yolanda; Tsipas, Sophia A.; Jiménez‐Morales, Antonia; Gordo, Elena
• Is Part Of: Advanced engineering materials. Volume 19:Issue 6(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-07-28
• Subjects: Materials -- Periodicals; 620.11
• DOI: 10.1002/adem.201600207
• Languages: English
• ISSNs: 1438-1656

Abstract

Abstract : This contribution focuses on modifying the composition and surface characteristics of powder metallurgy titanium substrates to improve their wear resistance and to reduce the surface Young's modulus, while maintaining the corrosion resistance and biocompatibility. The modification consists of Mo and TiN coatings produced by colloidal techniques which are deposited by electrophoretic deposition (EPD) or spraying onto green or sintered titanium substrates. The final surface structures are formed during a heat treatment, during which diffusion and consolidation of the layers take place. The surfaces are characterised by XRD, SEM, and micro‐indentation; showing diffusion areas of between 40 and 85 microns with clear microstructural changes as well as higher hardness values. Abstract : Surface modified powder metallurgy Ti materials are developed by colloidal techniques and diffusion processes. The addition of the β‐stabilizing element, Mo, leads to an α → α‐ β and β microstructural change. Diffusion layers with different characteristics are obtained by co‐sintering and diffusion processes. It is beneficial to improve hardness and of interest for further investigations about wear and corrosion.