Improvement of Microstructure and Mechanical Properties of SiC-VC System Obtained by Electroconsolidation.

IF 3.2 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Materials Pub Date : 2025-09-16 DOI:10.3390/ma18184331

Vyacheslav Ivzhenko, Edvin Hevorkian, Miroslaw Rucki, Volodymyr Nerubatskyi, Zbigniew Krzysiak, Volodymyr Chyshkala, Jolanta Natalia Latosińska, Waldemar Samociuk, Tadeusz Szumiata, Tamara Kosenchuk, Jacek Caban

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引用次数: 0

Abstract

This study examines the influence of vanadium carbide (VC) on the physical and mechanical properties of SiC-VC composites fabricated by a modified spark plasma sintering (SPS) method at a uniaxial pressure of 45 MPa. It was found that the addition of 40 wt.% VC into the SiC matrix led to a substantial reduction in porosity from ca. 30% to less than 8.2% and caused enhancement of the properties. Fracture toughness increased from 2.9 to 7.0 MPa·m^1/2, and hardness rose from 2.9 to 22.6 GPa. In the SiC-VC system, vanadium carbide acted as a grain growth inhibitor and particulate reinforcement. A sintering temperature increase from 1900 °C to 2000 °C resulted in a ~70% improvement in hardness and a ~50% gain in fracture toughness. The results highlighted the critical balance between densification parameters and microstructural stability. Utilization of n-dimensional vector space of material features, Mahalanobis distance, and Pareto trade-off optimization helped to describe the features of the newly obtained composites and to optimize the manufacturing process.

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电固结法改善SiC-VC体系的微观结构和力学性能。

在45 MPa单轴压力下，研究了碳化钒（VC）对改进火花等离子烧结（SPS）法制备SiC-VC复合材料物理力学性能的影响。结果表明，在SiC基体中添加40 wt.%的VC可使孔隙率从30%左右大幅降低到8.2%以下，并提高了材料的性能。断裂韧性由2.9 MPa·m1/2提高到7.0 MPa·m1/2，硬度由2.9 GPa提高到22.6 GPa。在SiC-VC体系中，碳化钒作为晶粒生长抑制剂和颗粒增强剂。烧结温度从1900℃提高到2000℃，硬度提高了70%，断裂韧性提高了50%。结果强调了致密化参数和微观结构稳定性之间的临界平衡。利用材料特征、马氏距离和Pareto权衡优化的n维向量空间，有助于描述新获得的复合材料的特征，并优化制造工艺。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

5.80

自引率

14.70%

发文量

7753

审稿时长

1.2 months

期刊介绍： Materials (ISSN 1996-1944) is an open access journal of related scientific research and technology development. It publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Materials provides a forum for publishing papers which advance the in-depth understanding of the relationship between the structure, the properties or the functions of all kinds of materials. Chemical syntheses, chemical structures and mechanical, chemical, electronic, magnetic and optical properties and various applications will be considered.