Characterization of inter-diffusion phase between gadolinium-doped ceria and yttria-stabilized zirconia during high-temperature sintering by in-situ and ex-situ transmission electron microscopy observations

被引：4

作者：

Shimura, Takaaki ^{[1
,2
]}

Miyazaki, Yoshinobu ^{[3
]}

Nakayama, Yoshiko ^{[3
]}

Takeguchi, Masaki ^{[3
]}

Shikazono, Naoki ^{[2
]}

机构：

[1] Tokyo Univ Agr & Technol, Dept Mech Syst Engn, Naka Cho 2-24-16, Koganei, Tokyo 1848588, Japan

[2] Univ Tokyo, Inst Ind Sci, Meguro Ku, 4-6-1 Komaba, Tokyo 1538505, Japan

[3] Natl Inst Mat Sci, Transmiss Electron Microscopy Stn, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

来源：

SOLID STATE IONICS | 2019年 / 342卷

基金：

日本科学技术振兴机构;

关键词：

Solid oxide fuel cells; Sinter/sintering; Interfaces; Transmission electron microscopy; High -temperature in-situ observation; OXIDE FUEL-CELL; MICROSTRUCTURAL CHANGE; POLARIZATION CHARACTERISTICS; POWDER MORPHOLOGY; ANODE; DEGRADATION; PERFORMANCE; OPERATION; CATHODE; QUANTIFICATION;

D O I：

10.1016/j.ssi.2019.115058

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Formation of an inter-diffusion phase of gadolinium-doped ceria (GDC) and yttria-stabilized zirconia (YSZ) during high-temperature sintering is a significant issue to deteriorate the electrochemical performance of solid oxide fuel cell electrodes. In the present study, microstructural change of GDC particles on a YSZ substrate and formation of a secondary phase during high-temperature sintering was observed by an in-situ transmission electron microscopy (TEM). A TEM sample was fixed on Nano-Chip (Wildfire, DENSsolutions), and the in-situ observation was carried out at 1300 degrees C. For comparison, an additional observation by TEM was also carried out using the sample prepared in ex-situ condition. Formation of inter-diffusion phase was observed in both experiments. However, grain growth and interfacial microstructure were different in each experiment. Based on the differences between the two tests, mechanisms of microstructural evolutions of GDC and interfacial structure are discussed.

引用

页数：11