CoCrFeNiTi高熵合金（Ti，W）C-HEA陶瓷的制备与表征

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.554

Liangcai Du , Qianqian Kong , Lichao Gong , Huachen Liu , Song Huang , Yunqi Xie , Zhenhua Yao

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引用次数: 0

摘要

高熵合金（HEAs）具有独特的核心效应和优异的性能，具有广阔的应用前景，特别是作为潜在的陶瓷胶粘剂。以机械合金化CoCrFeNiTi HEA粉末为粘结剂，采用真空烧结法制备了（Ti，W）C-HEA陶瓷。系统分析了制备的金属陶瓷的微观结构和力学性能，重点研究了HEA粘结剂对金属陶瓷力学性能的影响。结果表明，金属陶瓷的相对密度、洛氏硬度和横向断裂强度呈下降趋势。值得注意的是，CM1组（(Ti，W)C-30 wt% Co20Cr20Fe20Ni35Ti5）表现出最有利的综合性能，相对密度值为97.0%，洛氏硬度值为83.2 HRA， TRS值为776.6 MPa。采用差示扫描量热法（DSC）和热处理仔细研究了高温下HEAs的相变。结合x射线衍射（XRD）分析，升温热处理后Co20Cr20Fe20Ni25Ti15和Co20Cr20Fe20Ni15Ti25的相变为：FCC + BCC（磨粒）→FCC + σ（700℃~ 1100℃）→FCC（体块）。

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Fabrication and characterization of (Ti,W)C-HEA cermets based on the CoCrFeNiTi high entropy alloy

High entropy alloys (HEAs) exhibit distinctive core effects and excellent properties, presenting promising prospects for various applications, particularly as potential cermet adhesives. (Ti,W)C-HEA cermets were synthesized using vacuum sintering, employing mechanically alloyed CoCrFeNiTi HEA powder as a binder. The microstructure and mechanical properties of the produced cermets were systematically analyzed, with a particular focus on the effect of the HEA binder on the mechanical properties of the cermets. The findings indicated a decreasing trend in relative density, Rockwell hardness, and transverse rupture strength (TRS) of the cermets. Notably, the CM1 group ((Ti,W)C-30 wt% Co₂₀Cr₂₀Fe₂₀Ni₃₅Ti₅) demonstrated the most favorable overall properties, with values of 97.0 % for relative density, 83.2 HRA for Rockwell hardness, and 776.6 MPa for TRS. The phase transformation of HEAs at elevated temperatures was meticulously investigated using differential scanning calorimetry (DSC) and heat treatment. Combined with X-ray diffraction (XRD), the phase transformation of Co₂₀Cr₂₀Fe₂₀Ni₂₅Ti₁₅ and Co₂₀Cr₂₀Fe₂₀Ni₁₅Ti₂₅, heat treated at increasing temperatures, is as follows: FCC + BCC (milled) → FCC + σ (700°C–1100 °C) → FCC (bulk).

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.