Microstructure, wear behaviour and laser ablation behaviour of double glow plasma alloyed TaW coating

IF 4.6 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Refractory Metals & Hard Materials Pub Date : 2024-06-20 DOI:10.1016/j.ijrmhm.2024.106764

Zhimeng Ma , Lei Huang , Juntang Yuan , Xiaohu Chen , Dongying Zhang

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Abstract

TaW alloy is considered a crucial candidate for barrel protective coatings due to its high melting point, excellent high-temperature performance, and ablative resistance. In this study, TaW coating was deposited on the surface of PCrNi3MoVA gun steel by double glow plasma alloying (DGPA) technique. The morphology, phase structure, wear property, and laser ablation behaviour of the TaW deposited coating was studied and analyzed by means of scanning electron microscope (SEM), energy dispersive spectroscopy detector (EDS), X-ray diffractometer (XRD), ball-on-disk friction test, and laser pulse heating experiment. The results showed that the coating was dense and metallurgically bonded to the substrate. The coating was primarily composed of the α-Ta phase, and W was solidly dissolved in the Ta to form a mutual solution with solid-solution strengthening effect. The wear mechanisms of TaW coating were adhesive wear and oxidative wear. During the laser pulse heating (LPH) process, the transition region, center region, and splash region appeared successively in the ablation area of the coating. After 10 s of ablation, only a region with a diameter of 0.1 mm was penetrated, highlighting the effective protective role of the TaW infiltrated layer on the substrate.

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双辉光等离子体合金化 TaW 涂层的微观结构、磨损行为和激光烧蚀行为

由于具有高熔点、优异的高温性能和抗烧蚀性，TaW 合金被认为是枪管保护涂层的重要候选材料。本研究采用双辉光等离子体合金化（DGPA）技术在 PCrNi3MoVA 枪钢表面沉积了 TaW 涂层。通过扫描电子显微镜（SEM）、能量色散光谱仪（EDS）、X 射线衍射仪（XRD）、球盘摩擦试验和激光脉冲加热实验，研究和分析了沉积的 TaW 涂层的形貌、相结构、磨损性能和激光烧蚀行为。结果表明，涂层致密并与基体冶金结合。涂层主要由α-Ta相组成，W固溶于Ta中形成互溶体，具有固溶强化作用。TaW 涂层的磨损机理为粘着磨损和氧化磨损。在激光脉冲加热（LPH）过程中，涂层烧蚀区域依次出现过渡区、中心区和飞溅区。烧蚀 10 秒后，只有一个直径为 0.1 mm 的区域被穿透，这表明 TaW 渗入层对基体起到了有效的保护作用。

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来源期刊

$International Journal of Refractory Metals & Hard Materials$

International Journal of Refractory Metals & Hard Materials 工程技术-材料科学：综合

CiteScore

7.00

自引率

13.90%

发文量

236

审稿时长

35 days

期刊介绍： The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.