Jażdżewska Magdalena, Majkowska-Marzec Beata, Zieliński Andrzej, Ostrowski Roman, Frączek Aleksandra, Karwowska Gabriela, Olive Jean-Marc
Department of Biomaterials Technology, Faculty of Mechanical Engineering and Ship Technology, Institute of Manufacturing and Materials Technology, Gdańsk University of Technology, 80-233 Gdańsk, Poland.
Institute of Optoelectronics, Military University of Technology, 00-908 Warszawa, Poland.
Materials (Basel). 2023 Jul 5;16(13):4834. doi: 10.3390/ma16134834.
Laser treatment has often been applied to rebuild the surface layer of titanium and its alloys destined for long-term implants. Such treatment has always been associated with forming melted and re-solidified thin surface layers. The process parameters of such laser treatment can be different, including the patterning of a surface by so-called direct writing. In this research, pulse laser treatment was performed on the Ti13Nb13Zr alloy surface, with the distance between adjacent laser paths ranging between 20 and 50 µm. The obtained periodic structures were tested to examine the effects of the scan distance on the microstructure using SEM, the roughness and chemical and phase composition using EDS and XRD, and the mechanical properties using the nanoindentation technique. After direct laser writing, the thickness of the melted layers was between 547 and 123 µm, and the surface roughness varied between 1.74 and 0.69 µm. An increase in hardness was observed after laser treatment. The highest hardness, 5.44 GPa, was obtained for the sample modified with a laser beam spacing of 50 µm. The value of the distance has been shown to be important for several properties and related to a complex microstructure of the thin surface layer close to and far from the laser path.
激光处理经常被用于重建用于长期植入物的钛及其合金的表面层。这种处理总是与形成熔化并重新凝固的薄表面层相关联。这种激光处理的工艺参数可能不同，包括通过所谓的直接写入对表面进行图案化。在本研究中，对Ti13Nb13Zr合金表面进行了脉冲激光处理，相邻激光路径之间的距离在20至50微米之间。使用扫描电子显微镜（SEM）测试所获得的周期性结构，以研究扫描距离对微观结构的影响；使用能谱仪（EDS）和X射线衍射仪（XRD）测试粗糙度、化学和相组成；使用纳米压痕技术测试机械性能。直接激光写入后，熔化层的厚度在547至123微米之间，表面粗糙度在1.74至0.69微米之间变化。激光处理后观察到硬度增加。对于激光束间距为50微米的改性样品，获得了最高硬度5.44吉帕。结果表明，该距离值对多种性能很重要，并且与靠近和远离激光路径的薄表面层的复杂微观结构有关。
