Effect of carbon content on the structure and mechanical properties of (TiAlTaCrZr)CN high entropy alloy carbonitride coatings prepared by magnetron sputtering

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

Ceramics International Pub Date : 2025-04-01 DOI:10.1016/j.ceramint.2025.01.004

Chao Li , Guojian Li , Wenzhang Lü , Jiwu Deng , Ziheng Song , Qiang Wang

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Abstract

The (TiAlTaCrZr)CN high-entropy alloy carbonitride coatings were prepared by mid-frequency magnetron sputtering to address the poor wear resistance of traditional coated tools when cutting titanium alloys. The effect of carbon content on the microstructure, mechanical properties, and cutting performance of (TiAlTaCrZr)CN coatings was investigated. The results indicate that the amorphous structure of TiAlTaCrZr coating transforms to columnar crystalline structure with doping CN elements, forming an FCC solid solution. The (TiAlTaCrZr)CN coating with given CN content exhibits low friction coefficient (0.35), high hardness (23.1 GPa) and high adhesion (150 N). In this coating, interstitial CN atoms with small radius dissolve in the metal lattice, causing significant lattice distortion. This distortion enhances mechanical properties through dislocation strengthening and solid solution strengthening effects. Additionally, amorphous phases at grain boundaries reduce the friction coefficient and hinder crack propagation along the boundaries. Consequently, the wear rate of the (TiAlTaCrZr)CN coating is 1.22 × 10⁻⁶ mm³ N⁻¹ m⁻¹, which is reduced by 87 % compared to that of the TiAlTaCrZr coating. Furthermore, the cutting length of the (TiAlTaCrZr)CN coating increases by 230 % compared to the TiAlTaCrZr coating at a cutting speed of 100 m⸱min⁻¹ when machining titanium alloys. This coating demonstrates the potential to meet the demands of high-speed titanium alloy cutting.

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碳含量对磁控溅射制备（TiAlTaCrZr）CN高熵合金碳氮涂层组织和力学性能的影响

针对传统涂层刀具切削钛合金时耐磨性差的问题，采用中频磁控溅射技术制备了（TiAlTaCrZr）CN高熵合金碳氮化物涂层。研究了碳含量对（TiAlTaCrZr）CN涂层组织、力学性能和切削性能的影响。结果表明：掺杂CN元素后，TiAlTaCrZr涂层由非晶态结构转变为柱状结构，形成FCC固溶体；在一定CN含量下，（TiAlTaCrZr）CN涂层具有低摩擦系数（0.35）、高硬度（23.1 GPa）和高附着力（150 N）的特点。在该涂层中，小半径的间隙CN原子溶解在金属晶格中，造成明显的晶格畸变。这种变形通过位错强化和固溶强化效应提高了力学性能。此外，晶界处的非晶相降低了摩擦系数，阻碍了裂纹沿晶界扩展。结果表明，（TiAlTaCrZr）CN涂层的磨损率为1.22 × 10−6 mm3 N−1 m−1，比TiAlTaCrZr涂层降低了87%。此外，当切削速度为100 m⸱min−1时，（TiAlTaCrZr）CN涂层的切削长度比TiAlTaCrZr涂层增加了230%。该涂层具有满足高速钛合金切削需求的潜力。

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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.