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Published on: March 13, 2018
Pulsed laser coating of hydroxyapatite/titanium nanoparticles on Ti-6Al-4V substrates: multiphysics simulation and
Martin Yi Zhang1, Gary J Cheng
1School of Industrial Engineering, Purdue University, West Lafayette, IN 47907-2023, USA.
IEEE Transactions on Nanobioscience
|September 20, 2011
Summary
Pulsed laser coating (PLC) effectively bonds hydroxyapatite (HAp) and metal nanoparticles to metal substrates. This method ensures strong interfacial bonding and minimal thermal decomposition, ideal for bioceramic coatings.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Nanotechnology
Background:
- Pulsed laser coating (PLC) is an advanced technique for applying nanomaterials.
- Bioceramics and metal nanoparticles offer unique properties for coatings.
- Strong interfacial bonding and thermal stability are crucial for coating applications.
Purpose of the Study:
- To investigate the feasibility and effectiveness of pulsed laser coating (PLC) for bioceramics/metal nanomaterials on metal substrates.
- To analyze the interfacial bonding strength and thermal decomposition of PLC-processed coatings.
- To validate simulation models with experimental data for optimizing PLC parameters.
Main Methods:
- Multiphysics simulation coupling electromagnetic and heat transfer modules.
- Experimental coating of hydroxyapatite (HAp) and titanium nanoparticles on Ti-6Al-4V substrate using nanosecond pulsed Nd:YAG laser.
- Infrared (IR) thermography for temperature measurement and comparison with simulation results.
- Microstructure and chemical characterization of the coatings.
Main Results:
- PLC processing resulted in strong coating/substrate interfacial bonding strength.
- Minimum thermal decomposition was observed in PLC-processed hydroxyapatite (HAp) coatings.
- Experimental temperature measurements closely matched simulation predictions.
- Coating temperature showed a linear increase with pulse energy and followed a power law with decreasing pulse duration.
- Shorter laser pulses were recommended for improved sinterability.
Conclusions:
- Pulsed laser coating (PLC) is a feasible and effective method for applying bioceramics/metal nanomaterials on metal substrates.
- The rapid heating and cooling cycles of PLC preserve the physical and chemical integrity of hydroxyapatite (HAp).
- Simulation-guided parameter optimization is crucial for achieving desired coating properties and performance.
