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[Laser surface modification of medical titanium].
Qiang Wang1, Yang Zhang, Song Zhang
1Department of Dental Materials, School of Stomatology, China Medical University, Shenyang 110002, China.
Summary
Laser nitriding created a titanium nitride (TiN) layer on medical titanium, enhancing wear resistance, biocompatibility, and antisepsis for improved implant performance.
Area of Science:
- Biomaterials Engineering
- Surface Science
Background:
- Titanium is a widely used material for medical implants due to its biocompatibility.
- Improving surface properties of titanium implants is crucial for enhanced performance and longevity.
Purpose of the Study:
- To fabricate a titanium nitride (TiN) modified layer on pure titanium surfaces.
- To enhance the surface properties of medical titanium, including wear resistance, biocompatibility, and antisepsis.
Main Methods:
- Utilized a continuous-wave 2 kW Nd: YAG laser for surface irradiation in a nitrogen environment.
- Characterized the TiN coating using scanning electron microscopy, X-ray diffraction, and microhardness testing.
Main Results:
- A TiN modified layer approximately 400 micrometers thick was successfully fabricated.
- A gradient distribution of TiN from the surface to the substrate with good metallurgical bonding was observed.
- Microhardness of the modified layer decreased from the surface inward.
Conclusions:
- Achieved a compact, laser-modified gradient coating reinforced with fine TiN on medical titanium.
- Optimized process parameters resulted in enhanced surface properties for titanium implants.