This paper describes the utilization of a 3 kW continuous wave CO2 laser to modify the wettability characteristics of the magnesia partially stabilized zirconia (MgO-PSZ) bioceramic and analyses the changes in the physical characteristics of the MgO-PSZ surface following the CO2 laser interaction. The measurement with a set of test liquids revealed that CO2 laser surface treatment of the MgO-PSZ brought about a reduction in the contact angles, θ, indicating that the wettability characteristics of the MgO-PSZ had been enhanced. It was subsequently deduced that the factors active in causing the observed modification in the wettability characteristics of the MgO-PSZ were the increase in the surface O2 content and the increase in the polar component of the surface energy, γsvp. Furthermore, it was noted that the considerable decrease in contact angle was disproportional to the increase in surface roughness, showing surface roughness plays a minor role in inducing changes of the wettability characteristics of the MgO-PSZ. The value of this paper is that establishes the CO2 laser as a controllable and flexible process for improving the surface properties of the MgO-PSZ bioceramic.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Acoustics and Ultrasonics
- Surfaces, Coatings and Films