Sandoval-Robles Jesús A, Rodríguez Ciro A, García-López Erika
Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Ave. Eugenio Garza Sada 2501, Monterrey, Nuevo León 64849, Mexico.
Laboratorio Nacional de Manufactura Aditiva y Digital (MADiT)Apodaca, Nuevo León 66629, Mexico.
Materials (Basel). 2020 Nov 17;13(22):5203. doi: 10.3390/ma13225203.
The interplay between a prosthetic and tissue represents an important factor for the fixation of orthopedic implants. Laser texturing tests and electropolishing were performed on two materials used in the fabrication of medical devices, i.e., CoCr and Ti6Al4V-ELI alloys. The material surface was textured with a diode-pumped solid state (DPSS) laser and its effect on the surface quality and material modification, under different combinations of laser power and marking speed, were investigated. Our results indicate that an increment of energy per unit length causes an incremental trend in surface roughness parameters. Additionally, phase transformation on the surface of both alloys was achieved. Chemical analysis by energy dispersive X-ray spectrometer (EDX) shows the formation of (Co(Cr,Mo)) phase and the MC precipitate on the CoCr surface; while quantitative analysis of the X-ray diffractometer (XRD) results demonstrates the oxidation of the Ti alloy with the formation of TiO and TiO from the reduction of the α-Ti phase. The behaviors were both related with an increase of the energy per unit length. Control of the final surface roughness was achieved by an electropolishing post-treatment, minimizing the as-treated values. After polishing, a reduction of surface roughness parameters was obtained in a range between 3% and 44%, while no changes in chemical composition or present phases were observed.
假体与组织之间的相互作用是骨科植入物固定的一个重要因素。对用于制造医疗设备的两种材料，即钴铬合金和Ti6Al4V-ELI合金进行了激光纹理化测试和电解抛光。使用二极管泵浦固态（DPSS）激光对材料表面进行纹理化处理，并研究了在不同激光功率和标记速度组合下其对表面质量和材料改性的影响。我们的结果表明，单位长度能量的增加会导致表面粗糙度参数呈增加趋势。此外，两种合金表面均实现了相变。通过能量色散X射线光谱仪（EDX）进行的化学分析表明，钴铬合金表面形成了（Co（Cr，Mo））相和MC析出物；而X射线衍射仪（XRD）结果的定量分析表明，钛合金发生了氧化，α-Ti相还原形成了TiO和TiO 。这些行为均与单位长度能量的增加有关。通过电解抛光后处理实现了对最终表面粗糙度的控制，使处理后的数值最小化。抛光后，表面粗糙度参数降低了3%至44%，而化学成分或现有相未观察到变化。
