Enhancement of sliding wear and scratch resistance of two thermally sprayed Cr-based coatings by ultrasonic nanocrystal surface modification

被引：15

作者：

Amanov, Auezhan ^{[1
]}

Berkebile, Stephen P. ^{[2
]}

机构：

[1] Sun Moon Univ, Dept Mech Engn, Asan, South Korea

[2] US Army DEVCOM Army Res Lab, Aberdeen Proving Ground, MD 21005 USA

来源：

WEAR | 2023年 / 512卷

关键词：

Cr-based coatings; Thermal spray ceramic coating; Sliding wear; Scratch testing; Ultrasonic nanocrystal surface modification; CERAMIC COATINGS; TRIBOLOGICAL BEHAVIOR; CR3C2-NICR COATINGS; HEAT-TREATMENT; FRICTION; DAMAGE; MICROSTRUCTURE; TEMPERATURE; STRENGTH; ADHESION;

D O I：

10.1016/j.wear.2022.204555

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

This study aims to identify whether mechanical surface treatment can improve the properties of thermal spray coatings for use in fuel-lubricated sliding conditions. In this study, we investigated the effects of ultrasonic nanocrystal surface modification (UNSM) technology on thermally sprayed chromium oxide (Cr2O3) and chro-mium carbide-nickel chromium (Cr3C2-NiCr) coatings and the resulting changes in sliding wear in fuels and scratch resistance. The improvement in coefficient of friction (COF) and specific wear rate (SWR) of the coatings after UNSM treatment was attributed to the reduced surface roughness, increased surface hardness, and the formation of tribo-layers (oxide) having lower shear strength with good lubricating properties. The wear mechanisms of the coatings involved plastic deformation leading to abrasive and oxidation modes.

引用

页数：19

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