Abstract
The paper deals with the experimental study of laser beam micromachining of the powder metallurgy processed Ti compacts applying the industrial grade fibre nanosecond laser operating at the wavelength of 1064 nm. The influence of the laser energy density on the surface roughness, surface morphology and surface elements composition was investigated and evaluated by means of surface roughness measurement, scanning electron microscopy (SEM), energy dispersive X-Ray spectroscopy (EDS) and X-ray diffraction (XRD) analysis. The different laser treatment parameters resulted in the surfaces of very different characteristics of the newly developed biocompatible material prepared by advanced low temperature technology of hydride dehydride (HDH) titanium powder compactation. The results indicate that the laser pulse energy has remarkable effects on the machined surface characteristics which are discussed from the point of view of application in dental implantology.
Highlights
Titanium and titanium-based alloys find a wide-range engineering applications in many industrial areas owing to their excellent mechanical and chemical characteristics, high strength to weight ratio, good corrosion resistance, outstanding biocompatibility, relatively low density (4.5 g·cm−3 ) and lowYoung’s modulus [1,2,3]
The results of the amplitude surface roughness parameters of Ra, Rz and the bearing curve examination of the surface morphology, it is possible to note the loss of uniformity of the surface parameters of Rpk and Rvk of non-irradiated surface and surfaces ablated under different laser beam profile when the higher pulse energies are applied
The success of clinical application of titanium implants strongly depends on several factors, including the implant surface properties, such as surface macro, micro, and nano-topography, chemical composition, wettability, hydrophilicity and hydrophobicity which all influence the reaction of the host tissue, lengthen the implant’s life, increase its performance and improve the attachment of the implant with the biological tissue and bone
Summary
Titanium and titanium-based alloys find a wide-range engineering applications in many industrial areas owing to their excellent mechanical and chemical characteristics, high strength to weight ratio, good corrosion resistance, outstanding biocompatibility, relatively low density (4.5 g·cm−3 ) and lowYoung’s modulus [1,2,3]. Osseointegration—the structural linkage made at the contact point where the human bone and the surface of an implant meet—is supported by the implant surface porosity, surface roughness or by regular surface patterns (texture) with texture elements smaller than 100 μm [8,9]. These structures may be fabricated by different technologies, such as sintering, sandblasting [10], chemical etching [11], plasma spraying [12], electrical discharge machining [13], electron beam texturing etc., including laser beam micro-machining [14,15,16,17]. The interaction between the material and the laser beam is influenced by the properties of the machined material and the input process parameters
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