Effect of electric field strength stimulation on phase evolution in flash sintered hydroxyapatite at high-temperature range

IF 1.3 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS Advances in Applied Ceramics Pub Date : 2021-08-19 DOI:10.1080/17436753.2021.1967075

Jooseong Kim, I. Bajpai, J. Shackelford, Young-Hwan Han, Sukyoung Kim

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引用次数: 1

Abstract

ABSTRACT Flash sintering (FS) is becoming a popular densification route for high-temperature oxide ceramics because of its rapid sintering performance. In the current study, bar-shaped hydroxyapatite (HA) specimens were hung between two Pt wire electrodes and consolidated by FS through a direct electric field at a constant furnace temperature (1000°C or 1100°C) in air. The electric field facilitated the sintering of HA at relatively lower furnace temperatures than that obtained using the conventional sintering method. The voltage required for the onset of the flash decreased with increasing furnace temperature. The effects of the DC electric field strength at different sintering furnace temperatures were examined in terms of the phase evolution and stability of HA. HA phase dissociation was not observed regardless of the electric field strength or furnace temperature because of the very short FS time. Higher grain growth with fast densification in the flashed-sintered HA samples occurred with increasing electric field strength at each furnace temperature.

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电场强度刺激对高温闪烧羟基磷灰石相演化的影响

闪速烧结(FS)因其快速烧结的性能而成为一种流行的高温氧化物陶瓷致密化途径。在本研究中，将条形羟基磷灰石(HA)试样悬挂在两个Pt丝电极之间，并在恒定的炉温(1000℃或1100℃)下在空气中通过直接电场通过FS固结。电场促进了羟基磷灰石在相对较低的炉温下的烧结。闪光发生所需的电压随炉温的升高而降低。研究了不同烧结炉温度下直流电场强度对羟基磷灰石相演化和稳定性的影响。无论电场强度或炉温如何，均未观察到HA相分离，因为FS时间很短。随着电场强度的增加，闪蒸烧结的羟基磷灰石的晶粒生长速度加快，致密化速度加快。

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来源期刊

Advances in Applied Ceramics 工程技术-材料科学：硅酸盐

CiteScore

4.40

自引率

4.50%

发文量

审稿时长

5.2 months

期刊介绍： Advances in Applied Ceramics: Structural, Functional and Bioceramics provides international coverage of high-quality research on functional ceramics, engineering ceramics and bioceramics.