Consolidation of different hydroxyapatite powders by SPS: Optimization of the sintering conditions and characterization of the obtained bulk products

被引：27

作者：

Cuccu, A. ^{[1
]}

Montinaro, S. ^{[1
]}

Orru, R. ^{[1
]}

Cao, G. ^{[1
]}

Bellucci, D. ^{[2
]}

Sola, A. ^{[2
]}

Cannillo, V. ^{[2
]}

机构：

[1] Univ Cagliari, Unita Ric Consorzio, Dipartimento Ingn Meccan Chim & Mat, Interuniv Nazl Sci & Tecnol Mat, I-09123 Cagliari, Italy

[2] Univ Modena & Reggio Emilia, Dipartimento Ingn Enzo Ferrari, I-41125 Modena, Italy

来源：

CERAMICS INTERNATIONAL | 2015年 / 41卷 / 01期

关键词：

Hydroxyapatite; Tri-calcium phosphate (TCP); Spark plasma sintering; Mechanical properties; SPARK PLASMA; NANOSTRUCTURED HYDROXYAPATITE; THERMAL-DECOMPOSITION; IN-VITRO; FABRICATION; DENSIFICATION; CERAMICS;

D O I：

10.1016/j.ceramint.2014.08.131

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The difference in purity, particle size, microstructure, and thermo-chemical stability of three commercially available hydroxyapatite powders are found to play an important role during their consolidation using spark plasma sintering (SPS) as well as strongly affect the characteristics of the resulting sintered bodies. A fully dense material without secondary phases was obtained by SPS at 900 degrees C, when using the relatively small sized, with refined grains and high purity powders. The sintered product, consisting of sub-micrometer sized hydroxyapatite grains, displayed optical transparency and good mechanical properties. In contrast, the higher temperature levels (up to 1200 degrees C) needed to sinter powders with larger particles, or finer ones which contain additional phases, lead to products with coarser microstructures and/or significant amount of beta-TCP as a result of HAp decomposition. Optical characteristics, hardness and elastic modulus of the resulting sintered samples are correspondingly worsened. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：725 / 736

页数：12

共 28 条

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