Influence of SiC microstructure on its corrosion behavior in molten FLiNaK salt

被引：11

作者：

Espinoza-Perez, L. J. ^{[1
,2
]}

Esquivel-Medina, S. ^{[1
]}

Lopez-Honorato, E. ^{[1
,3
]}

机构：

[1] Ctr Invest & Estudios Avanzados IPN CINVESTAV, Unidad Saltillo, Ave Ind Metalurg 1062,Parque Ind, Ramos Arizpe 25900, Coahuila, Mexico

[2] Univ Nacl Ingn UNI, Sede Cent, Ave Univ,Apartado Postal 5595, Managua, Nicaragua

[3] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

CERAMICS INTERNATIONAL | 2021年 / 47卷 / 11期

关键词：

Grain boundary character distribution; Grain-size distribution; Microstructure; Corrosion rate; Silicon carbide; FLiNaK;

D O I：

10.1016/j.ceramint.2021.02.120

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：

The influence of the microstructure on the corrosion rate of three monolithic SiC samples in FLiNaK salt at 900 ?C for 250 h was studied. The SiC samples, labeled as SiC-1, SiC-2, and SiC-3, had corrosion rates of 0.137, 0.020, and 0.043 mg/cm2h, respectively. Compared with grain size and the presence of special grain boundaries (i.e., ?3), the content of high-angle grain boundaries (HAGBs) appeared to have the strongest influence on the corrosion rate of SiC in FLiNaK salt, since the corrosion rate increased six times as the concentration of high-angle grain boundaries increased from 19 to 32% for SiC-2 and SiC-1, respectively. These results stress the importance of controlling the content of HAGBs during the production process of SiC.

引用

页码：15527 / 15532

页数：6

共 35 条

[1] Combined effect of molten fluoride salt and irradiation on Ni-based alloys [J].

Bakai, A. S. .

MATERIALS ISSUES FOR GENERATION IV SYSTEMS: STATUS, OPEN QUESTIONS AND CHALLENGES, 2008, :537-+

[2] Grain-boundary type and distribution in silicon carbide coatings and wafers [J].

Cancino-Trejo, Felix ;

Lopez-Honorato, Eddie ;

Walker, Ross C. ;

Ferrer, Romelia Salomon .

JOURNAL OF NUCLEAR MATERIALS, 2018, 500 :176-183

[3] Grain boundary complexions in silicon carbide [J].

Cancino-Trejo, Felix ;

Navarro-Solis, David J. ;

Lopez-Honorato, Eddie ;

Rabone, Jeremy ;

Walker, Ross C. ;

Salomon, Romelia .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2018, 101 (03) :1009-1013

[4]

Chan LH, 2009, CERAM TRANS, V201, P261

[5] Diffusion on grain boundary networks: Percolation theory and effective medium approximations [J].

Chen, Ying ;

Schuh, Christopher A. .

ACTA MATERIALIA, 2006, 54 (18) :4709-4720

[6] PHONON DISPERSION CURVES BY RAMAN SCATTERING IN SIC POLYTYPES 3C,4H,6H,15R,AND 21R [J].

FELDMAN, DW ;

PARKER, JH ;

CHOYKE, WJ ;

PATRICK, L .

PHYSICAL REVIEW, 1968, 173 (03) :787-&

[7]

Filimonov Sergey N., 2015, Materials Science Forum, V821-823, P363, DOI 10.4028/www.scientific.net/MSF.821-823.363

[8] SiC layer microstructure in AGR-1 and AGR-2 TRISO fuel particles and the influence of its variation on the effective diffusion of key fission products [J].

Gerczak, Tyler J. ;

Hunn, John D. ;

Lowden, Richard A. ;

Allen, Todd R. .

JOURNAL OF NUCLEAR MATERIALS, 2016, 480 :257-270

[9] Corrosion behavior of TiC-SiC composite ceramics in molten FLiNaK salt [J].

Gu, Yifeng ;

Liu, Ji-Xuan ;

Wang, Yang ;

Xue, Jia-Xiang ;

Wang, Xin-Gang ;

Zhang, Haibin ;

Xu, Fangfang ;

Zhang, Guo-Jun .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2017, 37 (07) :2575-2582

[10] SiC coating: An alternative for the protection of nuclear graphite from liquid fluoride salt [J].

He, Xiujie ;

Song, Jinliang ;

Tan, Jie ;

Zhang, Baoliang ;

Xia, Huihao ;

He, Zhoutong ;

Zhou, Xingtai ;

Zhao, Mingwen ;

Liu, Xiangdong ;

Xu, Li ;

Bai, Shuo .

JOURNAL OF NUCLEAR MATERIALS, 2014, 448 (1-3) :1-3

← 1 2 3 4 →