Influence of electron irradiation on self-healing and thermal oxidation of SiC dispersed yttrium silicate composites

IF 3.5 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2024-12-16 DOI:10.1111/jace.20292

Huong Thi Nguyen, Yen-Ling Kuo, Makoto Nanko, Gordon James Thorogood, Alan Xu, Thi Mai Dung Do, Hisayuki Suematsu

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引用次数: 0

Abstract

Electron irradiation-induced acceleration of self-healing and high-temperature oxidation has been discovered in SiC/Y₂Si₂O₇–Y₂SiO₅ composites. Bulk samples were produced by pulsed electric current sintering. These samples were exposed to an electron beam from the pulsed intense relativistic electron beam accelerator with a beam energy of 2 MeV at irradiation doses of 10–40 kGy. The self-healing and high-temperature oxidation experiments were carried out at 1100–1300°C for 1–24 h in laboratory air. Electron irradiation significantly improved the self-healing effectiveness. The closure of surface cracks was caused by the volume expansion of SiC via transformation to SiO₂ and the outward diffusion of Y³⁺ ions. Electron irradiation also increased the thickness of the internally oxidized zone, formed by the inward diffusion of O²⁻ ions. Enhanced self-healing and oxidation behavior were associated with defect formation induced by electron beam exposure, which facilitated the diffusion of ions within the crystal lattice.

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来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.