Effect of pickling and mechanical surface treatment methods on adhesion strength of Ti oxide layer formed on titanium alloy substrate

S. Izman*, Mohammed Rafiq Abdul-Kadir, Mahmood Anwar, E. M. Nazim, E. K. Khor, M. Konneh

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

Titanium alloys are commonly used in biomedical application in hard tissues replacement especially for knee and hip implants but facing huge wear debris due to continuous cyclic contact within the joints of the implants. Diamond coating is a potential solution for improving the tribological and wear properties of the implants made from this alloy. Diamond is known for having high wear resistance property and chemical vapour deposition (CVD) is one of the most promising methods for diamond coating. However, the major concern for CVD process is the poor adhesion of the diamond to the substrate material due to the large mismatch of coefficient of thermal expansion (CTE) properties between the two. A suitable interlayer material can be introduced to reduce the gap of CTE differences by oxidation process. In this study, the effect of pickling temperature and mechanical surface treatment methods on the adhesion strength of Ti oxide interlayer prior to diamond coating were investigated. Besides, the thickness of oxide layer and surface morphology were also evaluated. Experiments were carried out on Ti6Al4V substrate by varying the surface treatment pickling temperature from 25C to 50C. In mechanical surface treatment, all samples were ground using #220 to #1200 grits and followed with polishing using alumina paste. After the surface treatment process, all the substrates underwent thermal oxidation for 25 hours at 900C. The results showed that the adhesion strength of oxide layer increases with the increasing of pickling temperature. Mechanical surface pretreatment provides better adhesion of oxide layer than chemical pretreatment (pickling process). However, the adhesion strength decreases with the increases of oxide layer thickness.

Original languageEnglish
Title of host publicationProceedings of the 34th International Electronics Manufacturing Technology Conference, IEMT 2010
Pages1-4
Number of pages4
ISBN (Electronic)9781424488278
DOIs
Publication statusPublished - 11 Apr 2011
Event34th International Electronics Manufacturing Technology Conference - Renaissance Hotel, Melaka, Malaysia
Duration: 30 Nov 20102 Dec 2010

Publication series

NameProceedings of the IEEE/CPMT International Electronics Manufacturing Technology (IEMT) Symposium
ISSN (Print)1089-8190

Conference

Conference34th International Electronics Manufacturing Technology Conference
Abbreviated titleIEMT 2010
Country/TerritoryMalaysia
CityMelaka
Period30/11/102/12/10

Keywords

  • coating
  • diamond
  • pickling
  • thermal oxidation
  • titanium alloy

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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