Composition optimization of (Hf, Ta, Zr, Cr)C high‐entropy carbides for good oxidation resistance

IF 1.8 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

International Journal of Applied Ceramic Technology Pub Date : 2024-08-12 DOI:10.1111/ijac.14891

Shuaijun Yang, Mei Wang, Yetong Lv, Huilin Sheng, Yexia Qin

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引用次数: 0

Abstract

Oxidation resistance is crucial to the potential applications of high‐entropy carbides (HECs) at elevated temperatures. Here, we realize the exploration of (Hf, Ta, Zr, Cr)C high‐entropy carbides (HEC‐TM, TM = Hf, Zr, Ta, and Cr) with good oxidation resistance by optimizing their compositions. To be specific, 21 kinds of HEC‐xTM (x = 0–25 mol%) samples are fabricated by a high‐throughput ultrafast high‐temperature sintering technique, followed by oxidation testing at 1673 K for 30 min. Among all the HEC samples, the as‐fabricated HEC‐0Zr samples are proved to possess the best oxidation resistance with an oxidation depth of only 53 µm. Further study on isothermal oxidation kinetics demonstrates that the as‐fabricated HEC‐0Zr samples follow a linear oxidation law. The good oxidation resistance of the as‐fabricated HEC‐0Zr samples is believed to result from the (Ta, Me)2O5 phase with a low melting point, which can promote the densification of the oxide layer. This research opens up a new way for efficiently discovering new HECs for extreme applications.

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优化（Hf、Ta、Zr、Cr）C 高熵碳化物的成分以获得良好的抗氧化性

抗氧化性对于高熵碳化物（HECs）在高温下的潜在应用至关重要。在此，我们通过优化成分，探索了具有良好抗氧化性的（Hf、Ta、Zr、Cr）C 高熵碳化物（HEC-TM，TM = Hf、Zr、Ta 和 Cr）。具体而言，通过高通量超快高温烧结技术制备了 21 种 HEC-xTM （x = 0-25 mol%）样品，然后在 1673 K 下进行了 30 分钟的氧化测试。在所有 HEC 样品中，制备的 HEC-0Zr 样品的抗氧化性最好，氧化深度仅为 53 µm。对等温氧化动力学的进一步研究表明，迭代制造的 HEC-0Zr 样品遵循线性氧化定律。据信，"原样制造 "的 HEC-0Zr 样品之所以具有良好的抗氧化性，是因为（Ta，Me）2O5 相的熔点较低，可以促进氧化层的致密化。这项研究为有效发现极端应用领域的新型 HEC 开辟了一条新途径。

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

International Journal of Applied Ceramic Technology 工程技术-材料科学：硅酸盐

CiteScore

3.90

自引率

9.50%

发文量

280

审稿时长

4.5 months

期刊介绍： The International Journal of Applied Ceramic Technology publishes cutting edge applied research and development work focused on commercialization of engineered ceramics, products and processes. The publication also explores the barriers to commercialization, design and testing, environmental health issues, international standardization activities, databases, and cost models. Designed to get high quality information to end-users quickly, the peer process is led by an editorial board of experts from industry, government, and universities. Each issue focuses on a high-interest, high-impact topic plus includes a range of papers detailing applications of ceramics. Papers on all aspects of applied ceramics are welcome including those in the following areas: Nanotechnology applications; Ceramic Armor; Ceramic and Technology for Energy Applications (e.g., Fuel Cells, Batteries, Solar, Thermoelectric, and HT Superconductors); Ceramic Matrix Composites; Functional Materials; Thermal and Environmental Barrier Coatings; Bioceramic Applications; Green Manufacturing; Ceramic Processing; Glass Technology; Fiber optics; Ceramics in Environmental Applications; Ceramics in Electronic, Photonic and Magnetic Applications;