Interaction of hydroxyapatite-titanium at elevated temperature in vacuum environment.
Interaction of hydroxyapatite-titanium at elevated temperature in vacuum environment.
复制标题
羟基磷灰石-钛在真空环境下高温下的相互作用。
DOI：
10.1016/j.biomaterials.2003.09.072
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Ong,JooL
中科院分区：
文献类型：
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作者：
Yang,Yunzhi;Kim,Kyo-Han;Agrawal,CMauli;Ong,JooL
研究了真空环境下羟基磷灰石（HA）与钛（Ti）在高温下的相互作用。将80wt% HA-20wt % Ti粉末混合物和90wt% HA-10wt % Ti粉末混合物在1100℃真空环境下进行干燥压榨和热处理。以透明质酸粉和市售纯钛粉为对照。采用x射线衍射（XRD）、傅里叶变换红外光谱、扫描电镜（SEM）和能量分散光谱对热处理后的样品进行了表征。XRD和SEM分析表明，真空热处理过程中金属Ti试样致密化。羟基磷灰石试样在真空中热处理导致羟基的损失，以及形成二级β-磷酸三钙相。在真空热处理的HA-Ti试样中未观察到金属Ti。真空热处理后的HA-Ti试样中存在α-磷酸三钙、磷酸四钙和氧化钛钙。结果表明，真空热处理工艺完全将金属-陶瓷复合材料转化为陶瓷复合材料。
In this study, the interaction between hydroxyapatite (HA) and titanium (Ti) at elevated temperature in vacuum environment was investigated. The 80wt% HA–20wt% Ti powder mixtures and 90wt% HA–10wt% Ti powder mixtures were dry pressed and heat-treated at 1100°C in vacuum environment. HA powders and the commercially pure Ti powders were used as controls. The heat-treated samples were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy, scanning electron microscope (SEM) and energy disperse spectra. XRD and SEM indicated densification of metallic Ti specimens during the in-vacuum heat treatment. Heat treatment of HA specimens in vacuum resulted in the loss of hydroxyl groups as well the formation of a secondary β-tricalcium phosphate phase. Metallic Ti was not observed in the in-vacuum heat-treated HA–Ti specimens. However, α-tricalcium phosphate, tetracalcium phosphate and calcium titanium oxide were observed for the in-vacuum heat-treated HA–Ti specimens. It was concluded that the in-vacuum heat-treatment process completely converted the metal–ceramics composites to ceramic composites.