Goodridge R D, Dalgarno K W, Wood D J
School of Mechanical Engineering, University of Leeds, Leeds, UK.
Proc Inst Mech Eng H. 2006 Jan;220(1):57-68. doi: 10.1243/095441105X69051.
The feasibility of using indirect selective laser sintering (SLS) to produce parts from glass-ceramic materials for bone replacement applications has been investigated. A castable glass based on the system SiO2 x Al2O3 x P2O5 x CaO x CaF2 that crystallizes to a glass-ceramic with apatite and mullite phases was produced, blended with an acrylic binder, and processed by SLS. Green parts with good structural integrity were produced using a wide range of processing conditions, allowing both monolayer and multilayer components to be constructed. Following SLS the parts were post-processed to remove the binder and to crystallize fully the material, evolving the apatite and mullite phases. The parts were heated to 1200 degrees C using a number of different time-temperature profiles, following which the processed material was analysed by differential thermal analysis, X-ray diffraction, and scanning electron microscopy, and tested for flexural strength. An increase in strength was achieved by infiltrating the brown parts with a resorbable phosphate glass, although this altered the crystal phases present in the material.
已对使用间接选择性激光烧结（SLS）由玻璃陶瓷材料制造用于骨替代应用的零件的可行性进行了研究。制备了一种基于SiO2 x Al2O3 x P2O5 x CaO x CaF2体系的可浇铸玻璃，该玻璃结晶为具有磷灰石和莫来石相的玻璃陶瓷，与丙烯酸粘合剂混合，并通过SLS进行加工。使用广泛的加工条件生产出具有良好结构完整性的绿色零件，从而能够构建单层和多层组件。SLS之后，对零件进行后处理以去除粘合剂并使材料完全结晶，形成磷灰石和莫来石相。使用多种不同的时间-温度曲线将零件加热到1200摄氏度，之后通过差示热分析、X射线衍射和扫描电子显微镜对加工后的材料进行分析，并测试其抗弯强度。通过用可吸收的磷酸盐玻璃渗透棕色零件实现了强度的提高，尽管这改变了材料中存在的晶相。
