| HA/Ti composite for biomedical application by mechanical milling |
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| 作者姓名： | 刘咏 刘芳 周科朝 黄伯云 |
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| 作者单位： | StateKeyLaboratoryforPowderMetallurgy,CentralSouthUniversity,Changsha410083,China |
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| 摘 要： | In order to overcome the poor mechanical properties of HA and the low bioactivity of Ti,HA/Ti composites with various compositions were prepared by mechanical milling.The effects of milling condition and the composition on the microstructure,the density and the hardness of the composites were studied.The results show that during the ball milling process.Ti particles are refined and the homogeneity of the HA/Ti mixtures is improved;HA will partially decompose due to the existence of Ti and high sintering temperature.The microstructure of HA/Ti composites is highly dependent on the milling condition and the composition.In the microstructure.Ti phase connects to be a continuous network,and HA/Ti mixtures disperse in the network.The longer the milling time,the finer the network will be.The density of HA/T composites decreases with the content of HA increasing and the milling time prolonging,because HA deteriorates the sinterability of Ti.The hardness of HA/Ti composites increases firstly with the content of HA increasing,and then drops when the content of HA exceeds 30%.Addition of HA will strengthen the HA/T composite but will decrease the density of the composite,which accounts for the effect of HA on the hardness of the composites.
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| 关 键 词： | 羟磷灰石 钛合金 生物医学 显微结构 |
HA/Ti composite for biomedical application by mechanical milling |
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| LIU Yong,LIU Fang,ZHOU Ke-chao,HUANG Bai-yun.HA/Ti composite for biomedical application by mechanical milling[J].Transactions of Nonferrous Metals Society of China,2003,13(1):60-64. |
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| Authors: | LIU Yong LIU Fang ZHOU Ke-chao HUANG Bai-yun |
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| Abstract: | In order to overcome the poor mechanical properties of HA and the low bioactivity of Ti, HA/Ti composites with various compositions were prepared by mechanical milling. The effects of milling condition and the composition on the microstructure, the density and the hardness of the composites were studied. The results show that during the ball milling process, Ti particles are refined and the homogeneity of the HA/Ti mixtures is improved; HA will partially decompose due to the existence of Ti and high sintering temperature. The microstructure of HA/Ti composites is highly dependent on the milling condition and the composition. In the microstructure, Ti phase connects to be a continuous network, and HA/Ti mixtures disperse in the network. The longer the milling time, the finer the network will be. The density of HA/Ti composites decreases with the content of HA increasing and the milling time prolonging, because HA deteriorates the sinterability of Ti.The hardness of HA/Ti composites increases firstly with the content of HA increasing, and then drops when the content of HA exceeds 30%. Addition of HA will strengthen the HA/Ti composite but will decrease the density of the composite, which accounts for the effect of HA on the hardness of the composites. |
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| Keywords: | HA/Ti composite mechanical milling microstructure |
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