Fabrication and properties of carbon nanotubes reinforced Fe/hydroxyapatite composites by in situ chemical vapor deposition

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• 作者：Haipeng Li ; Naiqin Zhao ; Yuan Liu ; Chunyong Liang ; Chunsheng Shi ; Xiwen Du ; Jiajun Li
• 关键词：A. Ceramic– ; matrix composites (CMCs) ; D. Electron microscopy ; E. Chemical vapor deposition (CVD)
• 刊名：Composites Part A: Applied Science and Manufacturing (Incorporating Composites and Composites Manufacturing)
• 出版年：2008
• 出版时间：July 2008
• 年：2008
• 卷：39
• 期：7
• 页码：1128-1132
• 全文大小：955 K

文摘

Carbon nanotubes (CNTs) (Fe)/hydroxyapatite (HA) composite powder with CNTs homogeneously dispersed was successfully prepared by a novel process, which involved producing Fe₂O₃/HA precursor, calcination in N₂ atmosphere and reduction in hydrogen of the Fe₂O₃/HA precursor to yield Fe/HA catalyst, and in situ synthesis of nanotubes by chemical vapor deposition over Fe/HA catalyst. These excellent CNTs(Fe)/HA composite powder was then employed to produce CNTs(Fe)/HA bulk composites. The CNTs(Fe)/HA bulk nanocomposites produced by pressing and sintering of the CNTs(Fe)/HA composite powder presented that the CNTs distributed homogenously and bonded strongly with the HA matrix. The effective enhancement of mechanical properties of the composites was indicated by a 226 % increase in fracture toughness and 49 % increase in flexural strength compared to monolithic HA bulk.