高速流动铅铋共晶中Ti2AlC涂层的冲蚀行为

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-04-05 DOI:10.1016/j.matlet.2025.138534

Xudan Ma , Xin Shen , Haijie Tang , Ruoxiang Qiu , Kefeng Lyu

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引用次数: 0

摘要

在饱和氧铅铋共晶（LBE）中，在360°C、表面流速约为14 m/s的条件下，在316L不锈钢基体上制备Ti2AlC涂层，并进行了长时间耐久性测试实验。随着侵蚀时间的延长，涂层表面沿流动方向逐渐形成条状侵蚀痕迹。LBE中的O与Ti和Al反应，在Ti2AlC涂层表面形成以TiO2和Al2O3为主的氧化保护层。采用高速LBE连续剪切外氧化物。随着Al和Ti的逐渐消耗，Pb和Bi渗入到涂层中。到6500 h时，出现了严重的不均匀减薄和加速剥落，部分局部涂层完全脱落。

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Erosion-corrosion behavior of Ti2AlC coatings in high-speed flowing lead-bismuth eutectic

Long-term durability testing experiments were conducted on Ti₂AlC coatings prepared on 316L stainless steel substrates in oxygen-saturated Lead-Bismuth Eutectic (LBE) at 360 °C for up to 6500 h with a surface flowing velocity of about 14 m/s. With prolonged erosion, stripe-like erosion traces gradually developed along the flow direction on the coating surface. O in LBE reacted with Ti and Al, leading to the formation of the protective oxide layer which was mainly composed of TiO₂ and Al₂O₃ on the surface of Ti₂AlC coating. The outer oxide was continuously sheared by high-speed LBE. As the Al and Ti is gradually consumed, Pb and Bi penetrate into the coating. By 6500 h, severe non-uniform thinning and accelerated spalling were observed, and some local coating had completely peeled off.

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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