Grain boundary complexions in silicon carbide

被引：15

作者：

Cancino-Trejo, Felix ^{[1
]}

Navarro-Solis, David J. ^{[1
]}

Lopez-Honorato, Eddie ^{[1
]}

Rabone, Jeremy ^{[2
]}

Walker, Ross C. ^{[3
,4
]}

Salomon, Romelia ^{[3
]}

机构：

[1] IPN, Unidad Saltillo, Ctr Invest & Estudios Avanzados, Saltillo, Coahuila, Mexico

[2] Safety & Environm Assurance Ctr, Colworth Sci Pk, Sharnbrook, Beds, England

[3] Univ Calif San Diego, San Diego Supercomp Ctr, Dept Chem & Biochem, La Jolla, CA 92093 USA

[4] GlaxoSmithKline PLC, Collegeville, PA USA

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2018年 / 101卷 / 03期

关键词：

coatings; diffusion; diffusivity; grain boundaries;

D O I：

10.1111/jace.15300

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：

Understanding the diffusion and release of fission products in nuclear fuels is of great relevance for ensuring high levels of safety of these materials. The origin of the diffusion of silver in TRISO (Tristructural Isotropic) coated fuel particles has remained an open challenge in the study of this type of fuel despite 40 years of development. In this work, we propose that the existence of grain boundary complexions and complexion transitions might be responsible for the complex diffusion behavior observed with silver. We have identified three types of the Dillon-Harmer complexions in SiC (clean grain boundary, a disordered layer with a similar to 0.6 nm of thickness, and an intergranular amorphous film) through ultra-high resolution transmission electron microscopy.

引用

页码：1009 / 1013

页数：5

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