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Surface contamination of titanium by abrading treatment
O Miyakawa1, K Watanabe, S Okawa
1Department of Dental Materials and Technology, Niigata University School of Dentistry.
Dental Materials Journal
|June 1, 1996
Summary
Abrading titanium (Ti) surfaces with silicon carbide (SiC) grit papers caused contamination. This contamination, containing silicon and oxygen, increased Ti surface hardness.
Area of Science:
- Materials Science
- Surface Engineering
- Tribology
Background:
- Abrasion is a common surface treatment process.
- Understanding surface contamination is crucial for material performance.
- Titanium (Ti) alloys are widely used in various demanding applications.
Purpose of the Study:
- To investigate the nature and extent of surface contamination on abraded titanium (Ti).
- To analyze the composition and bonding states of contaminants.
- To correlate contamination with changes in surface properties like hardness.
Main Methods:
- Abrasion of Ti specimens using silicon carbide (SiC) grit papers under water cooling.
- Surface analysis employing element analysis, X-ray diffraction (XRD), and hardness testing.
Main Results:
- Observed contaminant deposits up to 30 microns on abraded Ti surfaces.
- Ti content reduced by approximately 10%, replaced by silicon (Si) and oxygen (O).
- Si exhibited bonding states similar to SiC or titanium silicide; O dissolved in Ti, increasing surface hardness.
Conclusions:
- Abrasion with SiC grit papers leads to significant Ti surface contamination.
- Contamination involves Si and O incorporation, altering Ti's composition and structure.
- Surface hardness of Ti is directly influenced by the extent of abrasive contamination.