Multi-layer formation by oxidation and solid-state crystallization of cold sprayed amorphous coatings during dry sliding wear

IF 5.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL Wear Pub Date : 2024-09-01 DOI:10.1016/j.wear.2024.205553
Peng Han , Qiang Wang , Wenjuan Niu , Nan Li , Runling Qian , Mingfan Wan
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Abstract

Amorphous alloy coatings, known for the exceptional wear resistance, have emerged as a key solution for enhancing the wear performance of magnesium alloys under harsh environments. In this study, Fe-based amorphous alloy coatings were deposited on magnesium alloy by cold spraying technology, and the influence of microstructural evolution on the wear performance of coatings under dry sliding wear conditions was discussed. The results showed that a dense adherent oxide layer with a thickness of ∼700 nm comprising nanograins of less than 8 nm was formed at the outmost surface, which played a role of self-lubricating. Underneath, a 1 μm thick nanocrystalline-amorphous layer with nanograins of ∼20 nm dispersed in the amorphous alloy matrix was formed through in-situ crystallization induced by flash temperature. This composite structure prevented the formation of shear bands in amorphous alloys and enhanced the durability. Therefore, the transition from abrasive wear to adhesive wear was a consequence of the microstructural evolution from a dual-phase composite layer to a self-lubricating oxide layer.

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冷喷涂非晶涂层在干滑动磨损过程中通过氧化和固态结晶形成的多层涂层
非晶合金涂层以优异的耐磨性著称,已成为提高镁合金在恶劣环境下磨损性能的关键解决方案。本研究采用冷喷涂技术在镁合金上沉积了铁基非晶合金涂层,并讨论了干滑动磨损条件下微观结构演变对涂层磨损性能的影响。结果表明,在最外层表面形成了厚度为 700 nm 的致密附着氧化物层,其中包含小于 8 nm 的纳米晶粒,起到了自润滑作用。在非晶态合金基体中,通过闪蒸温度诱导的原位结晶形成了厚度为 1 μm 的纳米晶-非晶层,其中纳米晶粒的直径为 20 nm。这种复合结构防止了非晶合金中剪切带的形成,提高了耐久性。因此,从磨料磨损到粘着磨损的转变是微结构从双相复合层演变为自润滑氧化层的结果。
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来源期刊
Wear
Wear 工程技术-材料科学:综合
CiteScore
8.80
自引率
8.00%
发文量
280
审稿时长
47 days
期刊介绍: Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.
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