Effect of Carbon on the Structure and Properties of High-Entropy Variable-Composition (HfNbTaTiZr)CX Monocarbide

IF 0.6 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Metal Science and Heat Treatment Pub Date : 2026-08-06 DOI:10.1007/s11041-026-01224-y

A. E. Kim, E. V. Volokitina, N. G. Razumov, A. A. Popovich

引用次数: 0

Abstract

The processes of synthesis and sintering of a variable-composition carbide in a spark plasma sintering unit from a mechanical mixture of powders of a high-entropy HfNbTaTiZr alloy and carbon black are studied. The carbon content in the initial mixture is varied from 30 to 65 at.%. It is shown that the content of carbon changes during the sintering due to its diffusion from the graphite mold and reduction of the resulting ZrO₂ and HfO₂ oxides. Compressive tests of the high-entropy (HfNbTaTiZr)C_x carbide are performed. The compressive strength varies from 568 to 1395 MPa and the microhardness from 8.9 to 20.9 GPa depending on the carbide composition.

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碳对高熵变组分（HfNbTaTiZr）CX单晶碳化物结构和性能的影响

研究了以高熵HfNbTaTiZr合金粉末与炭黑机械混合，在火花等离子烧结装置中合成和烧结可变成分碳化物的工艺。初始混合物中的碳含量从30%到65%不等。结果表明，在烧结过程中，碳的含量发生了变化，这是由于碳从石墨模中扩散出来，并产生了ZrO2和HfO2氧化物的还原。对高熵（HfNbTaTiZr）碳化物进行了压缩试验。根据碳化物成分的不同，合金的抗压强度为568 ~ 1395 MPa，显微硬度为8.9 ~ 20.9 GPa。

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

Metal Science and Heat Treatment 工程技术-冶金工程

CiteScore

1.20

自引率

16.70%

发文量

102

审稿时长

4-8 weeks

期刊介绍： Metal Science and Heat Treatment presents new fundamental and practical research in physical metallurgy, heat treatment equipment, and surface engineering. Topics covered include: New structural, high temperature, tool and precision steels; Cold-resistant, corrosion-resistant and radiation-resistant steels; Steels with rapid decline of induced properties; Alloys with shape memory effect; Bulk-amorphyzable metal alloys; Microcrystalline alloys; Nano materials and foam materials for medical use.