铌酸锂增韧碳纳米管/羟基磷灰石生物复合材料的低温烧结和力学性能研究

doi:10.3724/SP.J.1077.2011.00863

无机材料学报 ›› 2011, Vol. 26 ›› Issue (8): 863-868.DOI: 10.3724/SP.J.1077.2011.00863

铌酸锂增韧碳纳米管/羟基磷灰石生物复合材料的低温烧结和力学性能研究

赵琰^1,2, 孙康宁^1,2, 刘鹏^1,2

(1. 山东大学材料液固结构演变与加工教育部重点实验室; 2. 山东省工程陶瓷重点实验室, 济南 250061)

收稿日期:2010-10-08 修回日期:2010-12-05 出版日期:2011-08-20 网络出版日期:2011-07-14
作者简介:赵琰(1984-), 女, 博士研究生. E-mail: zhaoyan3020@126.com
基金资助:
国家自然科学基金(30870610)

Low-temperature Sintering and Mechanical Properties of Lithium Nibate Toughening Carbon Nano-tubes/Hydroxyapatite Biocomposites

ZHAO Yan^1,2, SUN Kang-Ning^1,2, LIU Peng^1,2

(1. Key Laboratory for Liquid-Solid Structure Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China; 2. Engineering Ceramics Key Laboratory of Shandong Province, Shandong University, Jinan 250061, China)

Received:2010-10-08 Revised:2010-12-05 Published:2011-08-20 Online:2011-07-14
Supported by:
National Natural Science of China(30870610)

摘要/Abstract

摘要： 以铌酸锂(LiNbO₃)作为压电增韧相, 碳纳米管(CNTs)/羟基磷灰石(HAp)复合粉料作为基体, 通过热压烧结在较低的温度下制得一种力学性能优良的骨组织替代材料. 主要研究了不同烧结温度下LiNbO₃的加入对复合材料的物相组成、微观结构和力学性能的影响. 结果表明: 在热压烧结过程中, LiNbO₃部分与HAp发生反应生成新相CaNb₂O₆. 当烧结温度为900℃时, 加入48.5wt% LiNbO₃的复合材料的抗弯强度和断裂韧性分别达到135MPa和1.71 MPa^.m^1/2, 相比基体材料分别提高了55%和109%.

关键词: 铌酸锂, 羟基磷灰石, 增韧, 力学性能

Abstract: Carbon nano-tubes (CNTs)/hydroxyapatite (HAP) biocomposites reinforced by lithium nibate (LiNbO3) were successfully prepared by hot pressing at low temperature. The phase composition and microstructure of the composites were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM) and Energy dispersive X-ray spectroscope (EDS). Based on in-depth analysis of mechanical properties, the toughening mechanism was discussed in detail. The results indicate that LiNbO₃ addition has a great influence on mechanical properties and microstructure of the CNTs/HAp composites. The composites can be prepared at low temperature by the incorporation of LiNbO₃, and LiNbO₃ partially reacts with HAp to form CaNb₂O₆. With the rise of sintering temperature, the strength and density are improved obviously. Especially, the composite with addition of 48.5wt% LiNbO₃ hot pressed at 900℃ shows excellent flexural strength and fracture toughness, of about 135 MPa and 1.71 MPa^.m^1/2, respectively. In comparison with CNTs/HAp composite, the flexural strength and fracture toughness are increased 55% and 109%, respectively. Piezoelectric energy dissipation toughening and the improvement of density are the main contributions to the increase in the mechanical properties. These new composites may be promising bone substitute materials.

Key words: lithium nibate, hydroxyapatite, toughening, mechanical properties

中图分类号:

TB332

赵琰, 孙康宁, 刘鹏. 铌酸锂增韧碳纳米管/羟基磷灰石生物复合材料的低温烧结和力学性能研究[J]. 无机材料学报, 2011, 26(8): 863-868.

ZHAO Yan, SUN Kang-Ning, LIU Peng. Low-temperature Sintering and Mechanical Properties of Lithium Nibate Toughening Carbon Nano-tubes/Hydroxyapatite Biocomposites[J]. Journal of Inorganic Materials, 2011, 26(8): 863-868.

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铌酸锂增韧碳纳米管/羟基磷灰石生物复合材料的低温烧结和力学性能研究

Low-temperature Sintering and Mechanical Properties of Lithium Nibate Toughening Carbon Nano-tubes/Hydroxyapatite Biocomposites

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