Sliding wear investigation of suspension sprayed WC-Co nanocomposite coatings

被引：57

作者：

Ahmed, R. ^{[1
,2
]}

Ali, O. ^{[2
]}

Faisal, N. H. ^{[1
,3
]}

Al-Anazi, N. M. ^{[4
]}

Al-Mutairi, S. ^{[4
]}

Toma, F. -L. ^{[5
]}

Berger, L. -M. ^{[6
]}

Potthoff, A. ^{[6
]}

Goosen, M. F. A. ^{[7
]}

机构：

[1] Alfaisal Univ, Coll Engn, Riyadh 11533, Saudi Arabia

[2] Heriot Watt Univ, Sch Engn & Phys Sci, Edinburgh EH14 4AS, Midlothian, Scotland

[3] Robert Gordon Univ, Sch Engn, Aberdeen AB10 7GJ, Hong Kong, Peoples R China

[4] Saudi Aramco, Ctr Res & Dev, Mat Performance Unit, Dhahran 31311, Saudi Arabia

[5] IWS, Fraunhofer Inst Mat & Beam Technol, D-01277 Dresden, Germany

[6] IKTS, Fraunhofer Inst Ceram Technol & Syst, D-01277 Dresden, Germany

[7] Alfaisal Univ, Off Res & Grad Studies, Riyadh 11533, Saudi Arabia

来源：

WEAR | 2015年 / 322卷

关键词：

Nanostructured coating sliding wear; WC-Co coating suspension spraying; Tribology; MECHANICAL-PROPERTIES; TUNGSTEN CARBIDE; FATIGUE FAILURE; CONTACT FATIGUE; BEHAVIOR; MICROSTRUCTURE; ABRASION; EROSION; SIZE;

D O I：

10.1016/j.wear.2014.10.021

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Sliding wear evaluation of nanostructured coatings deposited by Suspension High Velocity Oxy-Fuel (S-HVOF) and conventional HVOF (Jet Kote (HVOF-JK) and JP5000 (HVOF-JP)) spraying were evaluated. S-HVOF coatings were nanostructured and deposited via an aqueous based suspension of the WC-Co powder, using modified HVOF (TopGun) spraying. Microstructural evaluations of these hardmetal coatings included X-ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) equipped with Energy Dispersive X-ray Spectroscopy (EDX). Sliding wear tests on coatings were conducted using a ball-on-flat test rig against steel, silicon nitride (Si3N4) ceramic and WC-6Co balls. Results indicated that nanosized particles inherited from the starting powder in S-HVOF spraying were retained in the resulting coatings. Significant changes in the chemical and phase composition were observed in the S-HVOF coatings. Despite decarburization, the hardness and sliding wear resistance of the S-HVOF coatings was comparable to the HVOF-JK and HVOF-JP coatings. The sliding wear performance was dependent on the ball-coating test couple. In general a higher ball wear rate was observed with lower coating wear rate. Comparison of the total (ball and coating) wear rate indicated that for steel and ceramic balls, HVOF-JP coatings performed the best followed by the S-HVOF and HVOF-JK coatings. For the WC-Co ball tests, average performance of S-HVOF was better than that of HVOF-JK and HVOF-JP coatings. Changes in sliding wear behavior were attributed to the support of metal matrix due to relatively higher tungsten content, and uniform distribution of nanoparticles in the S-HVOF coating microstructure. The presence of tribofilm was also observed for all test couples. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：133 / 150

页数：18

共 54 条

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