Abstract
This study is focused on the use of radio frequency magnetron sputtering to modify the surface of porous Ti6Al4V alloy fabricated via additive manufacturing technology. The hydroxyapatite (HA) coated porous Ti6Al4V alloy was studied in respect with its chemical and phase composition, surface morphology, water contact angle and hysteresis, and surface free energy. Thin nanocrystalline HA film was deposited while its structure with diamond-shaped cells remained unchanged. Hysteresis and water contact angle measurements revealed an effect of the deposited HA films, namely an increased water contact angle and contact angle hysteresis. The increase of the contact angle of the coating-substrate system compared to the uncoated substrate was attributed to the multiscale structure of the resulted surfaces.
Highlights
Additive manufacturing (AM) of plastics and metals is already well-established method in engineering and technology and is commonly used for rapid prototyping and small series production as well as manufacturing of the unique components with complex 3D shapes [1]
As clearly visible from these images metal surface contains a number of powder grains attached to the bulk metal providing a micrometer scale roughness, a feature commonly met for the powder bed AM processes
A comparison of the HA films on titanium substrate surfaces modified by acid etching and pulse electron beam treatment revealed significant differences in the morphology of the films and the mechanical properties [10]
Summary
Additive manufacturing (AM) of plastics and metals is already well-established method in engineering and technology and is commonly used for rapid prototyping and small series production as well as manufacturing of the unique components with complex 3D shapes [1]. One of the rapidly growing application areas of the AM is medicine, especially orthopedics and prosthetics. These applications are utilizing strongest advantages of the AM technologies such as freedom of component shapes, possibilities of computer optimization of the manufactured-to-be component functionality and properties, and reasonable prices in case of manufacturing of small series of products. These benefits are already recognized by medical implant manufacturers and practical surgeons [1]. The focus is based on the use of RFmagnetron sputtering to modify the surface of porous Ti6Al4V alloy fabricated via AM
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