Lorrison J C, Dalgarno K W, Wood D J
School of Mechanical Engineering, University of Leeds, Leeds, LS2 9JT, UK.
J Mater Sci Mater Med. 2005 Aug;16(8):775-81. doi: 10.1007/s10856-005-2616-3.
The work presented details the results of an investigation into the feasibility of using Selective Laser Sintering (SLS) to directly produce customised bioceramic implants. The materials used were bioactive in nature and included a glass-ceramic and a combination of hydroxyapatite and phosphate glass. The glass-ceramic was selected from the range of apatite-mullite materials in the SiO2.Al2O3.CaO.CaF2.P2O5 series, due to their potentially suitable biological and mechanical properties. The hydroxyapatite and phosphate glass combination was chosen to allow an alternative production approach to be investigated. The viability of using both these materials with the SLS process was assessed and the process route and resulting material properties characterised using a variety of techniques including Differential Thermal Analysis (DTA), X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). The results obtained indicate that it was possible to produce multiple layer components from both materials using the SLS process. The glass-ceramic materials could only be processed at very low scan speeds and powers, yielding relatively brittle components. It was though possible to produce parts from the hydroxyapatite and phosphate glass combination across a much wider range of parameters, producing parts which had a greater potential for possible implant production.
本文介绍了一项关于使用选择性激光烧结（SLS）直接生产定制生物陶瓷植入物可行性的研究结果。所使用的材料本质上具有生物活性，包括一种玻璃陶瓷以及羟基磷灰石和磷酸盐玻璃的组合。玻璃陶瓷是从SiO2.Al2O3.CaO.CaF2.P2O5系列的磷灰石 - 莫来石材料中选取的，因其具有潜在合适的生物学和力学性能。选择羟基磷灰石和磷酸盐玻璃的组合是为了研究另一种生产方法。评估了将这两种材料用于SLS工艺的可行性，并使用包括差示热分析（DTA）、X射线衍射（XRD）和扫描电子显微镜（SEM）在内的多种技术对工艺路线和所得材料性能进行了表征。获得的结果表明，使用SLS工艺可以从这两种材料生产多层部件。玻璃陶瓷材料只能在非常低的扫描速度和功率下进行加工，得到的部件相对较脆。不过，使用羟基磷灰石和磷酸盐玻璃的组合可以在更广泛的参数范围内生产部件，所生产的部件在植入物生产方面具有更大的潜力。
