Nanovoids in dense hydroxyapatite ceramics after electric field assisted sintering

被引：12

作者：

Yun, Jondo ^{[1
,2
]}

Qin, Wei ^{[2
]}

van Benthem, Klaus ^{[2
]}

Thron, Andrew M. ^{[2
]}

Kim, Sukyoung ^{[3
]}

Han, Young-Hwan ^{[3
]}

机构：

[1] Kyungnam Univ, Dept Nano Mat Engn, Chang Won, South Korea

[2] Univ Calif Davis, Dept Mat Sci & Engn, Davis, CA 95616 USA

[3] Yeungnam Univ, Sch Mat Sci & Engn, Gyongsan, South Korea

来源：

ADVANCES IN APPLIED CERAMICS | 2018年 / 117卷 / 06期

关键词：

Nanovoids; hydroxyapatite; spark plasma sintering; flash sintering; electric field assisted sintering; transmission electron microscopy; beam damage; thermal stability; TRANSPARENT HYDROXYAPATITE; IRRADIATION DAMAGE; TEM; CRYSTALLINE;

D O I：

10.1080/17436753.2018.1452662

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：

Nanoporous hydroxyapatite (HA) ceramics were consolidated using conventional or free sintering, spark plasma sintering (SPS) and flash sintering (FS). Microstructures formed during electric field assisted sintering, which includes SPS and FS revealed that nanovoids were retained within HA grains during processing. After free sintering, however, no nanovoids were detected by transmission electron microscopy (TEM). The observed nanovoids were confirmed not induced by electron beam damaging, and showed either a round or faceted shape with diameters ranging between 5 and 10 nm. In-situ TEM heating experiments demonstrated that nanovoids remained stable up to 900 degrees C but disappeared at a temperature as high as 1100 degrees C.

引用

页码：376 / 382

页数：7

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