期刊
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
卷 268, 期 17-18, 页码 2666-2678出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nimb.2010.05.101
关键词
Intense ion beam; Surface alloying; Surface modification; Metastable phase; Integral fuel burnable absorbers
类别
资金
- Department of Energy Nuclear Energy Research Initiatives (NERI) [DE-FG07-02SF22617]
We investigate the potential for incorporation by surface alloying of two elements, gadolinium (Gd) and boron (B), into Zr-alloy substrates, by the application of an intense ion beam pulse to a conventionally pre-applied Gd or B thin film coating to the substrate. The beam is produced by the Repetitive High Energy Pulsed Power-1 (RHEPP-1) ion beam facility at Sandia National Laboratories Surface alloying is desirable in this case for two reasons (1) conventional alloying is not possible because both Gd and B have negligible solubility in Zr at room temperature, and (2) a conventionally applied coating without surface alloying may be expected to delaminate in the harsh end-environment where the elements are used (e g fission reactors). While surface alloying has been a topic of investigation both by the present and prior researchers, the goal of the present work is the detailed study incorporating heat flow simulations and a full complement of materials analysis tools to characterize surface alloying of Zr-alloy substrates with Gd and B. Use of code simulations is essential for predicting appropriate film thickness and ion beam treatment fluences, which are specific to a given film-substrate system. Characterization after ion beam surface treatments confirmed successful alloying of both Gd and B by significant extension of their solid solubility in Zr-alloy substrates. While Gd surface alloying of Zr-alloys resulted in unacceptable oxidation in thermal and environmental conditions mimicking a nuclear reactor environment, B surface alloying resulted in acceptable corrosion resistance comparable to the as-received Zr-alloys. (C) 2010 Elsevier By. All rights reserved
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