The Microstructure, Surface Topography and Wear Resistance of Cold-Sprayed (Cr3C2-25(Ni20Cr))-(Ni-graphite) Composite Coatings Modified by Diode Laser Treatment

IF 3.2 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Journal of Thermal Spray Technology Pub Date : 2024-05-29 DOI:10.1007/s11666-024-01790-8

Anna Trelka-Druzic, Wojciech Żórawski, Lidia Lityńska-Dobrzyńska, Łukasz Maj, Marcin Kot, Grzegorz Wiązania, Anna Góral

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Abstract

Cold-sprayed composite coatings have several advantages; however, some properties, such as hardness and abrasion resistance, are lower than those in plasma- or HVOF-sprayed deposits. This work showed that the use of surface diode laser processing allowed the development of (Cr₃C₂-25(Ni20Cr))-(Ni-graphite) cermet coatings with good adhesion to the steel substrate, and increased properties in the near-surface zone, below which the properties of cold-sprayed coatings were retained. Studies of the microstructure in the micro/nanoscale of the laser-treated coatings showed strong grain refinement after surface treatment. Cr₇C₃ carbide of various shapes and sizes was formed in the structure; while, a several hundred nanometre layer of Cr₂O₃ oxide appeared on the coating surface. The changes occurring in the microstructure have resulted in increased mechanical and tribological properties of the laser-treated zone of deposits.

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经二极管激光处理改性的冷喷（Cr3C2-25(Ni20Cr)）-（镍石墨）复合涂层的显微结构、表面形貌和耐磨性

冷喷涂复合涂层具有多种优点，但某些性能（如硬度和耐磨性）低于等离子或 HVOF 喷涂涂层。这项研究表明，使用表面二极管激光加工技术可以开发出(Cr3C2-25(Ni20Cr))-(Ni-石墨)金属陶瓷涂层，涂层与钢基体的附着力良好，近表面区域的性能也有所提高，而在该区域以下，冷喷涂层的性能仍得以保留。对激光处理涂层的微米/纳米尺度微观结构的研究表明，表面处理后的晶粒细化程度很高。结构中形成了各种形状和大小的 Cr7C3 碳化物；同时，涂层表面出现了一层几百纳米的 Cr2O3 氧化物。微观结构的变化提高了激光涂层处理区的机械性能和摩擦学性能。

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来源期刊

Journal of Thermal Spray Technology 工程技术-材料科学：膜

CiteScore

5.20

自引率

25.80%

发文量

198

审稿时长

2.6 months

期刊介绍： From the scientific to the practical, stay on top of advances in this fast-growing coating technology with ASM International''s Journal of Thermal Spray Technology. Critically reviewed scientific papers and engineering articles combine the best of new research with the latest applications and problem solving. A service of the ASM Thermal Spray Society (TSS), the Journal of Thermal Spray Technology covers all fundamental and practical aspects of thermal spray science, including processes, feedstock manufacture, and testing and characterization. The journal contains worldwide coverage of the latest research, products, equipment and process developments, and includes technical note case studies from real-time applications and in-depth topical reviews.