Accelerated Aging in 3 mol%-Yttria-Stabilized Tetragonal Zirconia Ceramics Sintered in Reducing Conditions
Accelerated Aging in 3 mol%-Yttria-Stabilized Tetragonal Zirconia Ceramics Sintered in Reducing Conditions
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加速%20老化%20in%203%20mol%-氧化钇稳定%20四方晶%20氧化锆%20陶瓷%20烧结%20in%20还原%20条件
DOI：
10.1111/j.1151-2916.2004.tb07505.x
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
G. Fantozzi
中科院分区：
文献类型：
--
作者：
J. Bartolom'e;I. Montero;M. Díaz;S. Lopez;J. Moya;S. Deville;L. Grémillard;J. Chevalier;G. Fantozzi
研究了在空气和还原条件下烧结的3Y-TZP陶瓷在140℃水蒸气中的老化行为。X射线衍射分析表明，在还原条件下烧结的3Y-TZP样品的四方-单斜晶型转变明显高于在空气中烧结的致密度和平均晶粒度相近的样品。这可以用氧空位浓度的增加和X射线光电子能谱观察到的Fe2+离子析出而在晶界区形成的新聚集体相来解释。
The aging behavior of 3-mol%-yttria-stabilized tetragonal zirconia (3Y-TZP) ceramics sintered in air and in reducing conditions was investigated at 140{\deg}C in water vapor. It was observed by X-ray diffraction (XRD) that 3Y-TZP samples sintered in reducing conditions exhibited significantly higher tetragonal-to-monoclinic transformation than samples with similar density and average grain size values but obtained by sintering in air. This fact is explained by the increase of the oxygen vacancy concentration and by the presence at the grain boundary region of a new aggregate phase formed because of the exolution of Fe2+ ions observed by X-ray photoelectron spectroscopy.