Zhu Qingshan, De With Gijsbertus, Dortmans Leonardus J M G, Feenstra Frits
Multiphase Reaction Lab, Institute of Process Engineering, Chinese Academy of Sciences, PO. Box 353, Beijing 100080, People's Republic of China.
J Mater Sci Mater Med. 2004 Nov;15(11):1187-91.
Near net-shape fabrication of hydroxyapatite (HA) glass composites has been attempted by infiltrating a glass into porous HA performs. Main efforts were put to develop glasses that are chemically compatible with HA at elevated temperatures. After extensive investigations in the phosphate and borosilicate systems, glasses of (50-55)SiO2-(20-25)B203-(10-20)Li2O-(0-6)CaO (wt%) composition were successfully developed. The glass shows good chemical compatibility with HA at elevated temperatures. Dense HA/glass composites can be fabricated at 850-950 degress C by the melt infiltration process. Investigations demonstrated a good near net-shape capability of the process, where the linear shrinkage induced by the infiltration process is less than 0.1%. Preliminary mechanical tests showed that the fracture strength and toughness of the infiltrated HA/glass composite are comparable with dense HA.
通过将玻璃渗入多孔羟基磷灰石预制体，尝试进行羟基磷灰石（HA）玻璃复合材料的近净成形制造。主要致力于开发在高温下与HA化学相容的玻璃。在对磷酸盐和硼硅酸盐体系进行广泛研究之后，成功开发出了组成为（50 - 55）SiO₂ - （20 - 25）B₂O₃ - （10 - 20）Li₂O - （0 - 6）CaO（重量百分比）的玻璃。这种玻璃在高温下与HA显示出良好的化学相容性。通过熔体渗入工艺可在850 - 950℃下制造致密的HA/玻璃复合材料。研究表明该工艺具有良好的近净成形能力，其中渗入过程引起的线性收缩小于0.1%。初步力学测试表明，渗入的HA/玻璃复合材料的断裂强度和韧性与致密HA相当。
