{"title":"Erosion-corrosion behavior of Ti2AlC coatings in high-speed flowing lead-bismuth eutectic","authors":"Xudan Ma , Xin Shen , Haijie Tang , Ruoxiang Qiu , Kefeng Lyu","doi":"10.1016/j.matlet.2025.138534","DOIUrl":null,"url":null,"abstract":"<div><div>Long-term durability testing experiments were conducted on Ti<sub>2</sub>AlC 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 TiO<sub>2</sub> and Al<sub>2</sub>O<sub>3</sub> on the surface of Ti<sub>2</sub>AlC 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.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"392 ","pages":"Article 138534"},"PeriodicalIF":2.7000,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Materials Letters","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167577X25005634","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/4/5 0:00:00","PubModel":"Epub","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
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.
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
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