期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 25, 期 4, 页码 375-383出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2004.02.017
关键词
gelcasting; apatite; suspensions; sintering; mechanical properties
The aim of this work was to prepare hydroxyapatite (HA) pieces, by the gelcasting method, with appropriate mechanical properties for using as bone implants. The mechanical properties of the obtained pieces were evaluated. The influence of the solid content on the rheological behaviour of the slurries and, in turn, on the mechanical properties, was investigated. Pieces were prepared by using slurries containing 55 and 60 vol.% of an HA calcined at 1200 degreesC and 47 vol.% of HA calcined at 1100 degreesC. HA powders calcined at lower temperature than 1100 degreesC were not suitable for producing concentrated slurries. The raw and calcined HA were characterised by XRD, FTIR, X-ray fluorescence and elemental analysis. The pieces sintered at different temperatures and times were characterised by XRD, and the sintering treatment applied to the specimens for mechanical testing (1300 degreesC for 24 h) was selected taking into account the phases present after sintering. The mechanical properties of the green bodies were higher than obtained by other methods and the ones of the final pieces were comparable to those obtained by other techniques. The results indicated that slurries with a solid content higher than a limit value (for which limited contraction occurs) must be used and that the rheological properties of the slurries play an important role in the mechanical properties of the resulting pieces. (C) 2004 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据