Development of carbon nanofiber reinforced hydroxyapatite with enhanced mechanical properties

被引：68

作者：

Kobayashi, Satoshi ^{[1
]}

Kawai, Wataru ^{[1
]}

机构：

[1] Tokyo Metropolitan Univ, Fac Urban Liberal Arts, Tokyo 1920397, Japan

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2007年 / 38卷 / 01期

关键词：

ceramic-matrix composites; fracture toughness; strength; mechanical testing; sintering;

D O I：

10.1016/j.compositesa.2006.01.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to improve fracture toughness, carbon nanofibers (CNF) were used as reinforcement for hydroxyapatite (HA) composites. The powder mixture of CNF/HA were obtained with ball-milling technique. CNF/HA composites were sintered by hot-pressing with 7.81 and 15.6 MPa sintering pressure. Maximum sintering pressure was 1200 degrees C. Mechanical and physiological bio-compatibility were evaluated by four-point bending tests, indentation tests and immersion tests in simulated body fluid (SBF). The strength values of 10 Vol.% CNF/HA composites sintered at 15.6 MPa is 90 MPa, which is within those of cortical bone. The fracture toughness values for CNF/HA composites are around 1.6 times higher than those obtained for HA. Equal bioactivity are obtained for CNF/HA composites. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：114 / 123

页数：10

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