Densification Behavior and Mechanical Properties of Biomimetic Apatite Nanocrystals

被引：8

作者：

Eskandari, A. ^{[2
]}

Aminzare, M. ^{[2
]}

Hassani, H. ^{[2
]}

Barounian, H. ^{[2
]}

Hesaraki, S. ^{[2
]}

Sadrnezhaad, S. K. ^{[1
]}

机构：

[1] Sharif Univ Technol, Dept Mat Sci & Engn, Tehran, Iran

[2] Mat & Energy Res Ctr, Tehran, Iran

来源：

CURRENT NANOSCIENCE | 2011年 / 7卷 / 05期

关键词：

Apatite; biomimetic; mechanical properties; nanocrystal; sintering; PHOSPHATE BONE-CEMENT; HYDROXYAPATITE POWDERS; SPARK PLASMA; SINTERING PROCESS; NANOCOMPOSITES; BIOCERAMICS; FABRICATION; CERAMICS; STRENGTH; OXIDE;

D O I：

10.2174/157341311797483646

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 [微生物学]; 090105 [作物生产系统与生态工程];

摘要：

Nanocrystalline hydroxyapatite (nHA) of 50 nm average diameter and length to diameter ratio of >3 was synthesized by biomimetic method. Non-isothermal sintering improved densification behavior and mechanical properties of apatite to 0.88 maximum fractional density, 70MPa bending strength, 148MPa compressive strength and 2.53GPa microhardness at sintering temperature of 1250 C. Higher sintering temperatures resulted in the decomposition of the apatite and in-situ biphasic calcium phosphate HAP/TCP formation. This process lowered apatite densification and weakened mechanical properties of the sintered specimen. Transmission electron microscopy (TEM), x-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) helped to elucidate the structure/property correlations.

引用

页码：776 / 780

页数：5

共 24 条

[1]

Mechanical characteristics of porous hydroxyapatite/oxide composites produced by post-sintering hot isostatic pressing [J].