科研之友
微信
新浪微博
Facebook
分享链接
摘要
The combination of hydroxyapatite composite powder and three-dimensional (3D) printing rapid prototyping techniques has markedly improved skeletal interactions in orthopedic surgery applications. 3D printing methodology ensures effective bionic microstructure and shape interactions between an implant and the surrounding normal tissue. In effort to enhance the quality, precision, and mechanical properties of printed bone scaffolds, this study examines binder droplet spreading performance on the surface of hydroxyapatite (HA) microspheres. The piezoelectric nozzle diameter is about 10 mu m, which sprays droplets 20 mu m in diameter. The average size of HA powder particles is about 60 mu m in diameter. Most laboratories, however, are limited to observation of a single droplet 20 mu m or smaller in diameter impacting a spherical surface 60 mu m in diameter. Based on non-dimensional scale similarity theory in axisymmetric Stokes flow dynamics, this study conducted experiments and simulation on the same collision conditions (droplet 200 mu m in diameter, spherical surface 600 mu m in diameter). Simulation results were consistent with experiment data, and form a basis for future research on modeling droplet impact on spherical surfaces.
- 出版日期2015-7
- 单位西北工业大学
