(HfNbZrTaW)C5 high entropy carbide ceramics by spark plasma sintering for shielding materials of spent fuels

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-01-29 DOI:10.1016/j.vacuum.2025.114096

Penghui Lei , Xiaoyu Ji , Jiahao Chen , Yonghong Lu , Jie Qiu , Di Yun

引用次数: 0

Abstract

For the transportation and storage of spent fuels, where significant levels of neutron and gamma radiation are encountered, shielding materials are essential. In this paper, a new type of (HfNbZrTaW)C₅ high-entropy carbide ceramics with face-centered cubic rock-salt structure was designed and prepared as an integrated shielding material for both neutron and gamma ray protection, intended to replace the existing lead and epoxy resin. A single-phase (HfNbZrTaW)C₅ pellet with the best oxidation resistance was synthesized at 1700 °C by spark plasma sintering (SPS), achieving a theoretical density of 98.51 % and a hardness value of 25.28 GPa. Incorporating 10 wt % ZrB₂ into (HfNbZrTaW)C₅ ceramic sintered at 1700 °C can significantly enhance its the neutron absorption capacity, thermal conductivity, and oxidation resistance, positioning it as a potential integrated shielding material for spent nuclear fuels.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.