Mass transfer in polycrystalline ytterbium monosilicate under oxygen potential gradients at high temperatures

被引：20

作者：

Matsudaira, Tsuneaki ^{[1
]}

Wada, Masashi ^{[1
]}

Kawashima, Naoki ^{[1
]}

Takeuchi, Miyuki ^{[2
]}

Yokoe, Daisaku ^{[1
]}

Kato, Takeharu ^{[1
]}

Takata, Masasuke ^{[1
]}

Kitaoka, Satoshi ^{[1
]}

机构：

[1] Japan Fine Ceram Ctr, Atsuta Ku, 2-4-1 Mutsuno, Nagoya, Aichi 4568587, Japan

[2] Univ Tokyo, Bunkyo Ku, 2-11-16 Yayoi, Tokyo 1138656, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2021年 / 41卷 / 05期

关键词：

Ytterbium monosilicate; Oxygen potential gradients; Environmental barrier coating; Diffusion coefficient; Oxygen permeability;

D O I：

10.1016/j.jeurceramsoc.2020.07.045

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：

Mass transfer in polycrystalline Yb2SiO5 wafers with precise composition control was evaluated and analyzed by oxygen permeation experiments at high temperatures using an oxygen tracer. Oxygen permeation proceeded due to mutual grain boundary diffusion of oxide ions and Yb ions without synergistic effects such as acceleration or suppression. The oxygen shielding properties of Yb2SiO5 were compared with those of the other line compounds such as Yb(2)Si(2)O(2 )and Al2O3 based on the determined mass transfer parameters. It was found that the more preferentially an oxide ion diffuses in the grain boundary compared to the interior of the grain, the greater the effect of suppressing the movement of the oxide ion by applying an oxygen potential gradient becomes.

引用

页码：3150 / 3160

页数：11

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