Corrosion resistance of HiPIMS tungsten and tungsten-aluminium coatings in contact with liquid Sn

IF 5.3 2区 材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS Surface & Coatings Technology Pub Date : 2024-10-11 DOI:10.1016/j.surfcoat.2024.131449
D. Vavassori , L. Bana , M. Bugatti , G. Marra , V. Pinto , D. Dellasega , M. Iafrati , M. Passoni
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Abstract

Pure‑tungsten and tungsten-aluminium films deposited by high power impulse magnetron sputtering (HiPIMS) on copper‑chromium‑zirconium substrates were investigated as protective coatings against liquid tin corrosion, a critical issue for nuclear fusion applications. The growth of pure‑tungsten coatings was controlled by using a negative substrate bias synchronized to the HiPIMS pulse onset, resulting in columnar films with various degree of compactness and crystallinity according to the set bias amplitude (0, 400 and 800 V). Differently, the co-sputtering of W and Al favored the formation of an amorphous layer with a compact morphology. During liquid tin corrosion experiments at 400 °C for up to 600 min, all produced coatings were not dissolved, but different protective performances were observed after localized liquid tin interaction. Pure-W coated samples suffered from tin penetration after brittle failure of the protective layer. On the contrary, under the same experimental condition, WAl coatings proved to be effective in limiting liquid tin attack.
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HiPIMS 钨和钨铝涂层与液态锡接触时的耐腐蚀性能
研究了通过高功率脉冲磁控溅射(HiPIMS)在铜-铬-锆基底上沉积的纯钨和钨-铝薄膜,以作为防止液态锡腐蚀的保护层,这是核聚变应用中的一个关键问题。通过使用与 HiPIMS 脉冲起始同步的负基底偏压来控制纯钨涂层的生长,从而根据设定的偏压幅度(0、400 和 800 V)生成了具有不同紧密度和结晶度的柱状薄膜。不同的是,W 和 Al 的共溅射有利于形成具有致密形态的无定形层。在 400 °C、长达 600 分钟的液态锡腐蚀实验中,所有产生的涂层都没有溶解,但在局部液态锡相互作用后观察到了不同的保护性能。纯锡涂层样品在保护层脆性失效后出现锡渗透。相反,在相同的实验条件下,WAl 涂层被证明能有效限制液态锡的侵蚀。
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来源期刊
Surface & Coatings Technology
Surface & Coatings Technology 工程技术-材料科学:膜
CiteScore
10.00
自引率
11.10%
发文量
921
审稿时长
19 days
期刊介绍: Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.
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