Revealing tribo-oxidation mechanisms of the copper-WC system under high tribological loading

被引：16

作者：

Chen, X. ^{[1
]}

Ma, Y. ^{[2
,3
]}

Yang, Y. ^{[1
]}

Meng, A. ^{[1
]}

Han, Z. X. ^{[4
]}

Han, Z. ^{[4
]}

Zhao, Y. H. ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Nano & Heterogeneous Mat Ctr, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China

[2] Rhein Westfal TH Aachen, Steel Inst IEHK, Intzestr 1, D-52072 Aachen, Germany

[3] Max Planck Inst Eisenforsch GmbH MPIE, Max Planck Str 1, D-40237 Dusseldorf, Germany

[4] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China

来源：

SCRIPTA MATERIALIA | 2021年 / 204卷

基金：

中国国家自然科学基金;

关键词：

Tribology; Oxidation; Transmission electron microscopy (TEM); Atom probe tomography; Copper; DEFORMATION MECHANISMS; FRICTION; WEAR; EVOLUTION; BEHAVIOR;

D O I：

10.1016/j.scriptamat.2021.114142

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The near-surface structural and chemical changes were investigated for pure copper against a tungsten carbide (WC) sphere during high tribological loading. Fundamental stages are identified in the Cu-WC tribo-system: (i) high tribological stress promotes grain refinement to the ultra-fine grains regime in the very beginning; (ii) nucleation of extremely fine (similar to 3 nm) oxygen-enriched Cu nano particles in the nearsurface layer and subsequent growth of the Cu2O oxide; (iii) formation of continuous nanostructured mixing layer with heterogeneous Cu and O distribution in the late stage. Near-surface mechanical mixing is presumably the main contribution to chemical modifications under high tribological loading. Our findings shed atomic-insights into intricate tribochemical modifications, one of the most intriguing phenomena in material-oriented tribology. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页数：5

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