Comparative study of the synthesis and processing of hydroxyapatite

被引:8
作者
de Campos, M
Bressiani, AH
机构
[1] Univ Mogi Das Cruzes, Technol Res Ctr, BR-08780911 Mogi Das Cruzes, SP, Brazil
[2] IPEN CNEN SP, DMC, Dept Mat Engn, BR-05508900 Sao Paulo, Brazil
来源
BIOCERAMICS 14 | 2002年 / 218-2卷
关键词
hydroxyapatite; synthesis; processing; and plasma spraying;
D O I
10.4028/www.scientific.net/KEM.218-220.171
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 HAp is a biomaterial applied as dense, porous or coating bioceramics, in the medical and odontological areas. The aim of this work was obtain hydroxyapatite with characteristics that allow its application as dense or porous bodies, and coating studying three methods of syntheses: precipitation, neutralization and sol-gel in alcoholic media. Precipitation and neutralization showed the best results for thermal spraying stability, being thereafter reproduced in a pilot scale, in an open and closed system. Nitrogen atmosphere was used to avoid the formation of hydroxyapatite carbonate. The powders obtained by neutralization were used for coating titanium alloy substrate. Plasma spraying technique was used for deposition. On coating layer HAp was the main phase detected, showing a good adherence to the substrate. Porous ceramic bodies were obtained by gel casting foam with the HAp from the neutralization method in an inert atmosphere. The main techniques used on the characterization of powder, metallic substrates, coatings, porous and dense ceramic bodies were: particle size distribution (D), scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The HAp phase was detected as the majority in all conditions and results are no cytotoxicity.
引用
收藏
页码:171 / 174
页数:4
相关论文
共 3 条
[1]  
Ravaglioli A., 1992, Bioceramics: materials, properties, applications
[2]   Properties of highly porous hydroxyapatite obtained by the gelcasting of foams [J].
Sepulveda, P ;
Ortega, FS ;
Innocentini, MDM ;
Pandolfelli, VC .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2000, 83 (12) :3021-3024
[3]  
Valente MDC, 2001, KEY ENG MAT, V189-1, P623