Grain boundary complexions in silicon carbide

Felix Cancino-Trejo; David J. Navarro-Solis; Eddie López-Honorato; Jeremy Rabone; Ross C. Walker; Romelia Salomon

doi:10.1111/jace.15300

Grain boundary complexions in silicon carbide

Felix Cancino-Trejo, David J. Navarro-Solis, Eddie López-Honorato, Jeremy Rabone, Ross C. Walker, Romelia Salomon

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

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 ~0.6 nm of thickness, and an intergranular amorphous film) through ultra-high resolution transmission electron microscopy.

Original language	English
Pages (from-to)	1009-1013
Number of pages	5
Journal	Journal of the American Ceramic Society
Volume	101
Issue number	3
DOIs	https://doi.org/10.1111/jace.15300
State	Published - Mar 2018
Externally published	Yes

Funding

This material is based upon work supported by a grant from the University of California Institute for Mexico and the United States (UC MEXUS) and the Consejo Nacional de Ciencia y Tecnología de México (CONA-CYT). The authors would like to acknowledge CONA-CYT for the PhD grants awarded to F. Cancino-Trejo and D. Navarro-Solis. Finally, the authors would like to thank Joseph Somers from ITU for providing the SiC coated particles and the technical support from FEI and JEOL in the acquisition of the TEM/STEM/EDS images. This material is based upon work supported by a grant from the University of California Institute for Mexico and the United States (UC MEXUS) and the Consejo Nacional de Ciencia y Tecnolog?a de M?xico (CONACYT). The authors would like to acknowledge CONACYT for the PhD grants awarded to F. Cancino-Trejo and D. Navarro-Solis. Finally, the authors would like to thank Joseph Somers from ITU for providing the SiC coated particles and the technical support from FEI and JEOL in the acquisition of the TEM/STEM/EDS images.

Funders	Funder number
University of California Institute for Mexico and the United States
Shell United States
Consejo Nacional de Ciencia y Tecnología
Forschungskreis der Ernährungsindustrie
Fondo Nacional de Ciencia y Tecnología

Keywords

coatings
diffusion/diffusivity
grain boundaries

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10.1111/jace.15300

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abstract = "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 ~0.6 nm of thickness, and an intergranular amorphous film) through ultra-high resolution transmission electron microscopy.",

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AU - López-Honorato, Eddie

AU - Rabone, Jeremy

AU - Walker, Ross C.

AU - Salomon, Romelia

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AB - 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 ~0.6 nm of thickness, and an intergranular amorphous film) through ultra-high resolution transmission electron microscopy.

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Grain boundary complexions in silicon carbide

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