Raman spectroscopic investigation of graphitization of diamond during spark plasma sintering of UO2-diamond composite nuclear fuel

被引：34

作者：

Chen, Zhichao ^{[1
]}

Subhash, Ghatu ^{[1
]}

Tulenko, James S. ^{[2
]}

机构：

[1] Univ Florida, Mech & Aerosp Engn, Gainesville, FL 32611 USA

[2] Univ Florida, Mat Sci & Engn, Gainesville, FL 32611 USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2016年 / 475卷

关键词：

Diamond; Raman spectroscopy; Graphitization; Spark plasma sintering; UO2-Diamond composite; THERMAL-CONDUCTIVITY; RESIDUAL-STRESS; SILICON-CARBIDE; TEMPERATURE; PHASE; FILMS; UO2;

D O I：

10.1016/j.jnucmat.2016.03.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Micro-Raman spectroscopy (MRS) was utilized to investigate the graphitization of diamond particles within a UO2-diamond composite processed by spark plasma sintering (SPS). While pure diamond gives a sharp Raman peak at 1331.6 cm(-1), the graphitized diamond shows broad peaks either at 1350 cm(-1) (G-peak) or 1580 cm(-1) (D-peak). The degree of graphitization was quantified by calculating the area beneath the diamond and graphite peaks. It was found that more than 20% of diamond was graphitized on the surface of the UO2-diamond pellet and only around 10% diamond was graphitized in the interior regions of the pellet. This current study highlights the necessity to review the implications of these results carefully while implementing UO2-diamond composite nuclear fuel. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：1 / 5

页数：5

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