In situ fabrication and wettability of Ca2SiO4/CaTiO3 biocoating by laser cladding technology on Ti-6Al-4V alloy. (1st May 2013)

• Record Type: Journal Article
• Authors: Yang, Y L; Guo, N
• Is Part Of: Materials science and technology. Volume 29:Number 5(2013:May)
• Page Start: 598
• Page End: 604
• Publication Date: 2013-05-01
• Subjects: Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1179/1743284712Y.0000000188
• Languages: English
• ISSNs: 0267-0836

Abstract

<abstract> <title> <x xml:space="preserve">Abstract</x> </title> <p>Wetting is the first and foremost event when a biomaterial is implanted into the biological system. Hence, it is very essential to investigate the wettability of a biomaterial before further biological studies. A textured coating with different relative amounts of Ca₂SiO₄ and CaTiO₃ was <italic>In situ</italic> fabricated by varying laser scan speed. The wettability of different coatings was investigated. The results indicate that the relative amount of Ca₂SiO₄ phase increased with decreasing laser scan speeds and reached the highest value of 48·17±2·10 mJ mm⁻², and the geometrically textured topography with a surface roughness of 9·17 μm was obtained at a laser scan speed of 2 mm s⁻¹. The microstructure in the coating can be characterised as fine dendrites. Surface energy values varied with the relative amount of Ca₂SiO₄ phase. The coating obtained at the laser scan speed of 2 mm s⁻¹, which contains more relative amount of Ca₂SiO₄, presents the highest surface energy, indicating most desirable wettability. This resulted in an increase in contact angle in simulated body fluid solution for improved wettability. The microhardness presented a gradient distribution from the coating surface (1072 HV) to the substrate (260 HV).</p> </abstract>