Simultaneous enhancement of hardness and toughness of nano-CeO2 modified multi-scale WC-10Co-4Cr coating via HVOF

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters Pub Date : 2025-03-18 DOI:10.1016/j.matlet.2025.138418

Geng Xie , Bin Zhang , Hailong Liu , Dongqun Xin , Yan Cai , Weidong Mu

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Abstract

This study presents a novel design strategy for enhancing performance of WC-10Co-4Cr coatings by incorporation of nano-CeO₂ into multi-scale WC particles, applied via high-velocity oxygen fuel (HVOF) spraying. The aim is to concurrently improve hardness and toughness, addressing trade-off typically observed in these coatings. Four types of coatings were prepared: submicrostructured, nanostructured, multi-scale, and nano-CeO₂-modified multi-scale coatings. The results demonstrated that multi-scale coating, particularly when modified with nano-CeO₂, exhibited superior hardness and fracture toughness compared to conventional micron or nano-structured coatings. Addition of nano-CeO₂ effectively inhibited decarburization during HVOF process, reducing formation of brittle W₂C phases and lowering porosity. This led to a more uniform distribution of WC particles and enhanced interfacial bonding, resulting in a denser and more resilient coating structure. Nano-CeO₂-modified multi-scale coating achieved an optimal balance between hardness and toughness, offering a promising pathway for development of high-performance WC-Co(Cr) coatings for demanding industrial applications.

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HVOF法同时增强纳米ceo2改性多尺度WC-10Co-4Cr涂层的硬度和韧性

本研究提出了一种新的设计策略，通过高速氧燃料（HVOF）喷涂，将纳米ceo2掺入多尺度WC颗粒中，以提高WC- 10co - 4cr涂层的性能。目的是同时提高硬度和韧性，解决在这些涂层中通常观察到的权衡。制备了亚微结构、纳米结构、多尺度和纳米ceo2修饰的四种涂层。结果表明，与传统的微米或纳米结构涂层相比，多尺度涂层，特别是纳米ceo2改性涂层，具有更高的硬度和断裂韧性。纳米ceo2的加入有效抑制了HVOF过程中的脱碳，减少了脆性W2C相的形成，降低了孔隙率。这导致WC颗粒分布更均匀，界面结合增强，从而形成更致密、更有弹性的涂层结构。纳米ceo2修饰的多尺度涂层实现了硬度和韧性的最佳平衡，为高性能WC-Co（Cr）涂层的开发提供了一条有希望的途径，以满足苛刻的工业应用。

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive