等离子抛光时间对3D打印多孔钛表面粗糙度的影响

Influence of Electrolytic Plasma Polishing Time on Surface Roughness of Porous Titanium by 3D printing

摘要:

利用3D打印技术制作仿天然骨的多孔钛骨科植入物具有广阔的前景，等离子抛光技术作为表面技术的一种，可有效去除3D打印多孔钛零件表面附着的颗粒物，降低表面粗糙度。本文分析了不同等离子抛光时间下多孔钛零件外表面及内层孔结构外表面的表面形貌，并测量了其表面粗糙度值。通过实验可得，抛光时间越长，表面越顺滑，表面粗糙度值越低，抛光时间是影响表面粗糙度值的重要因素。根据抛光时间与表面粗糙度值的拟合曲线，得出了在保证零件内外表面的表面粗糙度值在最优值范围下的抛光时间区间。

Abstract:

Porous titanium orthopedic implants fabricated by 3D printing have golden prospects. As one of the surface technologies, electrolytic plasma polishing can effectively remove the powder particles attached to the surface of 3D printed porous titanium parts and can reduce the surface roughness. In this paper, the surface morphology and surface roughness of the external and inner surface were analyzed and tested at different plasma polishing times. Electrolytic plasma polishing is effective to improve surface roughness. The longer the polishing time is, the smoother the surface is and the lower the surface roughness is. The polishing time is an important factor affecting the surface roughness. By the fitting curve, the surface roughness of the external and inner surface can be guaranteed to be within a reasonable range by the control of polishing time.