Characterization of Tritium Retention in Plasma Sprayed B4C/Mo Coatings

doi:10.3724/SP.J.1077.2013.13074

Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (9): 1040-1044.DOI: 10.3724/SP.J.1077.2013.13074

• Research Letter • Previous Articles Next Articles

Characterization of Tritium Retention in Plasma Sprayed B₄C/Mo Coatings

LIN Chu-Cheng¹, ZHU Hui-Ying², MASAO Matsuyama³, WANG Hu⁴, HUANG Li-Ping¹, ZHENG Xue-Bin¹, ZENG Yi²

(1. Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 3. Hydrogen Isotope Research Center, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan; 4. Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China)

Received:2013-01-31 Revised:2013-03-05 Published:2013-09-20 Online:2013-08-14
About author:LIN Chu-Cheng (1987–), male, bachelor. E-mail: chucheng@mail.sic.ac.cn
Supported by:
Open Fund of Key Laboratory of Inorganic Coating Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences(KLICM-2012-03); Research Fund for Nanomaterials of Shanghai (11nm0506900); Shanghai Municipal Committee of Science and Technology Research Project (11231201302); International S&T Cooperation Program of China (2013DFG52290)

Abstract

Abstract: Quantification of the amount and depth of tritium retained on plasma facing materials (PFMs) surface is of great importance for selecting PFMs with high safety in the nuclear system. In the present study, potential PFMs of B₄C/Mo coatings were prepared and the depth profiles of tritium in the coatings were measured both by imaging plate (IP) technique and β-ray induced X-ray spectrometry (BIXS). The IP images showed that the amount of adsorbed tritium in the coatings followed the order of B₄C > BM15 > BM5 > Mo, which was along with the X-ray spectra also illustrating that most tritium penetrated into the bulk of the B₄C coating while on the surface only for the other three coatings. The cross-sectional morphologies of the coatings were observed by scanning electron microscope (SEM), which demonstrated that B₄C coatings had the highest porosity while the other three coatings were denser despite of the existence of smaller-sized pores and cracks. All the results suggest that pores and microcracks in the as-sprayed coatings provide passageway for tritium penetration and adsorption, which are the key factors that affect the amount of tritium adsorbed. Furthermore, the content of Ti contamination in the coatings also plays an important role in controlling tritium adsorption.

Key words: B₄C/Mo coatings, PFMs, tritium, X-ray spectrometry

CLC Number:

TG174

LIN Chu-Cheng, ZHU Hui-Ying, MASAO Matsuyama, WANG Hu, HUANG Li-Ping, ZHENG Xue-Bin, ZENG Yi. Characterization of Tritium Retention in Plasma Sprayed B₄C/Mo Coatings[J]. Journal of Inorganic Materials, 2013, 28(9): 1040-1044.

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Characterization of Tritium Retention in Plasma Sprayed B₄C/Mo Coatings

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