Date of Graduation
5-2022
Document Type
Thesis
Degree Name
Bachelor of Science in Biomedical Engineering
Degree Level
Undergraduate
Department
Biomedical Engineering
Advisor/Mentor
Zou, Min
Committee Member
Quinn, Kyle
Second Committee Member
Wolchok, Jeffrey C.
Third Committee Member
Balachandran, Kartik
Fourth Committee Member
Muldoon, Timothy
Abstract
Artificial orthopedic implants such as hip joints suffer from excessive wear due to excess friction between the polyethylene and cobalt-chromium-molybdenum surfaces of the device. This increase in friction causes a fraction of them to give out within ten years. Therefore, to minimize the probability of this happening, recent research has been conducted regarding laser surface texturing of the cobalt-chromium-molybdenum alloy components of artificial joints. These surface textures serve to mimic the native lubrication mechanisms of cartilage in natural joints, which, in a natural joint, lowers the friction. However, the production of these laser surface textures is still a field of research in its nascent stages and requires a highly precise procedure for the production of textures high enough in quality to reduce friction. In addition to this, the most effective textures in the reduction of friction are micro-dimples of varying shapes which interact with the joint synovial fluid in a way which reduces wear. Because this field of study is still a fairly new one, most research has not advanced to producing these textures on the implant, itself, but instead on planar samples to solidify the proper parameters for the micro-dimples. Following this research direction, this project studied the optimization of a 32-Oxford A5 Femtosecond Laser in the production of high-resolution micro-dimpling patterns on a sample disk of cobalt-chromium-molybdenum.
Keywords
Micro-dimples; Tribology; Friction; Femtosecond; Laser Surface Texturing; Laser
Citation
Dharwadker, G. (2022). Surface Laser Texturing of CoCrMo Alloys. Biomedical Engineering Undergraduate Honors Theses Retrieved from https://scholarworks.uark.edu/bmeguht/117
Included in
Bioimaging and Biomedical Optics Commons, Biomaterials Commons, Biomechanical Engineering Commons, Biomechanics and Biotransport Commons, Biomedical Devices and Instrumentation Commons, Nanoscience and Nanotechnology Commons, Other Biomedical Engineering and Bioengineering Commons, Tribology Commons
