Graphite flakes/UO2 fuel pellets with excellent thermal conductivity in radial direction

被引：9

作者：

Li, Bingqing ^{[1
]}

Yang, Zhenliang ^{[1
]}

Wang, Zhiyi ^{[1
]}

Huang, Qiqi ^{[1
]}

Liu, Xuxu ^{[1
]}

Yan, Biaojie ^{[1
]}

Cheng, Liang ^{[1
]}

Shi, Tao ^{[1
]}

Zhang, Dezhi ^{[1
]}

Wu, Min ^{[1
]}

Gao, Rui ^{[1
]}

Chu, Mingfu ^{[1
]}

Zhang, Pengcheng ^{[1
]}

Bai, Bin ^{[1
]}

机构：

[1] China Acad Engn Phys, Inst Mat, 9 Huafengxincun, Jiangyou 621700, Sichuan, Peoples R China

来源：

JOURNAL OF NUCLEAR MATERIALS | 2021年 / 545卷 / 545期

基金：

中国国家自然科学基金;

关键词：

Composites; Thermal conductivity; UO2; Graphite flakes; URANIUM-DIOXIDE; COMPOSITE FUEL; MECHANICAL-PROPERTIES; MATRIX COMPOSITES; THERMOPHYSICAL PROPERTIES; NANO-LAYER; MICROSTRUCTURE; EXPANSION; FABRICATION; GRAPHENE;

D O I：

10.1016/j.jnucmat.2020.152639

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to increase the radial thermal conductivity (TC) of UO2 pellets, highly-oriented graphite flakes (GFs) were first introduced to UO2 pellets by spark plasma sintering. The radial TC of GFs/UO2 agreed well with Hatta-Taya model, which was closely related to the well-bonded interface and highly-oriented structure. Compared with UO2, the radial TC of GFs/UO2 was greatly improved by about 200 % within a wide temperature range, higher than all the other reported value until now. Such enhancement in TC would significantly improve the safety of UO2 fuel pellets. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：8

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