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Surface Modification of Powder Metallurgy Titanium by Colloidal Techniques and Diffusion Processes for Biomedical Applications
Author(s) -
Ureña Julia,
Mendoza Carlos,
Ferrari Begoña,
Castro Yolanda,
Tsipas Sophia A.,
JiménezMorales Antonia,
Gordo Elena
Publication year - 2017
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201600207
Subject(s) - materials science , titanium , metallurgy , electrophoretic deposition , surface modification , corrosion , powder metallurgy , indentation , tin , microstructure , biocompatibility , composite material , chemical engineering , coating , engineering
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.