To improve the wear and corrosion resistance of key components and ensure the safe operation of offshore equipment, we applied an ∞ oscillating laser to prepare a TiAlSi-Ni composite coating. The effects of Ni addition on the composition, microstructure, corrosion resistance and mechanical properties of the coating were experimentally investigated. The results showed that the coating mainly presented an interdendritic - dendritic structure, and the S4 coating with 17 at% Ni had the best wear and corrosion resistance. In the reciprocating sliding friction and wear test at 10 N and 30 N, the wear rates were 0.83 and 1.66 × 10−7 mm2·N−1, respectively, which is 1/5 and 1/3 of TC4 under this load. The S4 also had the largest passivation interval and passivation film stability. The internal and external double-layer film structure ensures that it is not corroded by corrosive medium. The Ti3Al/TiNi semi-coherent interface and lattice distortion gave the Ti3Al-Ti2Ni and TiAl-TiNi eutectic interfaces a high bonding strength. Moreover, the “labyrinth effect” produced by the lamellar eutectic structure further improved the corrosion resistance. This work provides a new method for obtaining coatings with high adhesion and wear and corrosion resistance for offshore platforms.

中文翻译：

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∞振荡激光熔覆制备的TiAlSi-Nix （x = 0， 5， 11， 17， 23 at%） 多主成分合金涂层的耐磨性和耐腐蚀性


为了提高关键部件的耐磨性和耐腐蚀性，确保海上设备的安全运行，我们应用∞振荡激光器制备了 TiAlSi-Ni 复合涂层。实验研究了 Ni 添加对涂层成分、微观组织、耐腐蚀性和力学性能的影响。结果表明，涂层主要呈现树枝间-树突结构，其中 17 at% Ni 的 S4 涂层具有最佳的耐磨性和耐腐蚀性。在 10 N 和 30 N 的往复滑动摩擦磨损试验中，磨损率分别为 0.83 和 1.66 × 10−7 mm2·N−1，即在此载荷下为 TC4 的 1/5 和 1/3。S4 还具有最大的钝化间隔和钝化膜稳定性。内外双层膜结构确保不受腐蚀性介质的腐蚀。Ti3Al/TiNi 半相干界面和晶格畸变使 Ti3Al-Ti2Ni 和 TiAl-TiNi 共晶界面具有很高的键合强度。此外，层状共晶结构产生的“迷宫效应”进一步提高了耐腐蚀性。这项工作为海上平台获得具有高附着力和耐磨性以及耐腐蚀性的涂层提供了一种新方法。