通过粉末冶金工艺分散 TiO2 增强剂强化 CrFeCuMnNi 高熵合金的机械和摩擦学性能

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

Ceramics International Pub Date : 2024-12-15 DOI:10.1016/j.ceramint.2024.10.155

Cheenepalli Nagarjuna , Sheetal Kumar Dewangan , K. Raja Rao , Man Mohan , Hansung Lee , Eunhyo Song , Byungmin Ahn

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引用次数: 0

摘要

本研究报告了 TiO2 增强对通过粉末冶金法加工的 CrFeCuMnNi/TiO2 高熵合金复合材料（HEACs）的相、微结构、力学和摩擦学性能的影响。结果表明，原始 HEA 经过 30 小时的研磨后形成了单相面心立方（FCC）结构，而 HEAC 中的 TiO2 峰则呈均匀分布。烧结后观察到多相，包括 FCC、富铬和 Cr2O3。随着 TiO2 含量的增加，HEA 的硬度从 330±10 HV 增加到 440±10 HV，抗压屈服强度从 480 MPa 增加到 760 MPa，同时应变从 43.5% 减少到 21%。加入 TiO2 后，摩擦系数略有降低，比磨损率降低了 45.16%，这是由于硬度增加以及在磨损表面形成稳定的氧化层抑制了塑性变形。二氧化钛的添加降低了磨料磨损和粘着磨损的主导地位，增强了 HEAC 的强度。

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Strengthening of mechanical and tribological properties in CrFeCuMnNi high entropy alloy through dispersion of TiO2 reinforcement via powder metallurgy processes

The present study reports the effect of TiO₂ reinforcement on the phase, microstructure, mechanical and tribological properties of CrFeCuMnNi/TiO₂ high entropy alloy composites (HEACs) processed by powder metallurgy. The results reveal the formation of single-phase face-centered cubic (FCC) structure after 30 h of milling in the original HEA, while TiO₂ peaks in the HEACs indicate uniform distribution. After sintering, multiple phases including FCC, Cr-rich, Cr₂O₃ were observed. The hardness of HEAs increased from 330 ± 10 to 440 ± 10 HV and compressive yield strength increased from 480 to 760 MPa while scarifying the strain from 43.5 to 21 % with TiO₂ content. The addition of TiO₂ content slightly reduces the coefficient of friction and specific wear rate decreased by 45.16 % due to increased hardness and formation of stable oxide layer on the worn surface inhibits plastic deformation. The addition of TiO₂ reduces the dominance of abrasive and adhesive wear and enhances the strength of HEACs.

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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.