常压等离子体喷射渗氮Fe-Mn-Al合金的组织演变及表面硬化

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-09-22 DOI:10.1016/j.surfcoat.2025.132722

Fikiru Tafase Mosisa , Ting-Wen Lu , Yu-Lin Kuo , Jhao-Yu Guo

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引用次数: 0

摘要

等离子体氮化是一种表面硬化技术，通过将氮扩散到金属材料的表面，从而提高金属材料的性能，从而增加耐磨性并减少摩擦。研究了常压等离子体射流氮化Fe-Mn-Al合金的力学性能和腐蚀行为。利用H₂/N₂混合气体，APPJ工艺促进了合金表面氮化铁的形成。最初，Fe-Mn-Al合金呈现均匀的单相面心立方（FCC）结构。氮化后，出现了由保留的FCC和新形成的有序L1₂相组成的双相结构。APPJ渗氮处理显著提高了合金的表面硬度、耐磨性、动载性能和耐蚀性。这些增强随着APPJ功率的增加而更加明显，这表明APPJ功率水平与合金表面氮扩散和氮化物形成的有效性之间存在很强的相关性。500w的APPJ氮化形成Al₉Mn和Fe₄N，而更高功率（550 W和600 W）的APPJ氮化形成Fe₄N和Al，表明合金的逐步分解。

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Microstructural evolution and surface hardening of Fe-Mn-Al alloy through atmospheric pressure plasma jet nitriding

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Microstructural evolution and surface hardening of Fe-Mn-Al alloy through atmospheric pressure plasma jet nitriding

Plasma nitriding, a surface-hardening technique, enhances the properties of metallic materials by diffusing nitrogen into their surfaces, thereby increasing wear resistance and reducing friction. This study explores the mechanical properties and corrosion behavior of Fe-Mn-Al alloy following nitriding via an atmospheric pressure plasma jet (APPJ). Utilizing an H₂/N₂ gas mixture, the APPJ process facilitated the formation of iron nitride on the alloy surface. Initially, the Fe-Mn-Al alloy exhibited a uniform, single-phase, face-centered cubic (FCC) structure. Post-nitriding, a dual-phase structure emerged, consisting of retained FCC and a newly formed ordered L1₂ phase. The APPJ nitriding significantly improved the alloy's surface hardness, abrasion resistance, dynamic load performance, and corrosion resistance. These enhancements were more pronounced with increased APPJ power, indicating a strong correlation between APPJ power levels and the effectiveness of nitrogen diffusion and nitride formation on the alloy surface. APPJ nitriding at 500 W forms Al₉Mn and Fe₄N, while higher powers (550 W and 600 W) yield Fe₄N and Al, indicating progressive alloy decomposition.

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来源期刊

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.