Properties of WC-10%Co-4%Cr Detonation Spray Coating Deposited on the Al-4%Cu-1%Mg Alloy.

Marina Samodurova,Nataliya Shaburova,Evgeny Trofimov,Vladimir Ul’yanitckiy,Olga Samoilova,Ahmad Ostovari Moghaddam,Kirill Pashkeev

doi:10.3390/ma14051206

Marina Samodurova, Nataliya Shaburova + Show 5 more

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https://doi.org/10.3390/ma14051206

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Abstract

One of the methods of local improvement of the wear resistance of aluminum alloy parts is the deposition of hard tungsten carbide-based coatings on the surfaces subjected to intense external influence. This paper is devoted to the characterization of the WC–10Co–4Cr (wt.%) coating deposited on an Al–4Cu–1Mg (wt.%) alloy by the detonation spray method. In comparison with the common thermal spray techniques like High Velocity Oxygen Fuel (HVOF) or Atmospheric Plasma Spraying (APS), the heat input delivered to the substrate during detonation spray is significantly lower, that is especially important in case of coating deposition on aluminum alloys. The paper presents the results of morphology investigation, microstructure, phase composition, microhardness, and cohesive strength of deposited carbide-based detonation spray coating. Results showed that the coating has a porosity less than 0.5% and the carbide grain refinement down to the submicron size during coating deposition was detected. According to the investigation, the variation of spraying distance from 270 to 230 mm does not influence on the coating microstructure and composition.

Highlights

IntroductionAluminum and its alloys are traditionally classified as materials with low hardness and low tribological characteristics
Low abrasive wear resistance during friction was reported by Udoye et al [1]. These properties of aluminum alloys can be enhanced by surface hardening performed by micro-arc oxidation (MAO), plasma electrolytic oxidation (PEO) and deposition of hard materials by electroplating [2,3,4,5,6,7,8,9,10,11,12,13], or by thermal spraying of hard coatings based on tungsten, titanium, and tantalum carbides with metal bond
High Velocity Oxygen Fuel (HVOF) or Atmospheric Plasma Spraying (APS), the heat input delivered to the substrate during detonation spray is significantly lower, that is especially important in case of coating deposition on aluminum alloys

Summary

Introduction

Aluminum and its alloys are traditionally classified as materials with low hardness and low tribological characteristics. Low abrasive wear resistance during friction was reported by Udoye et al [1]. These properties of aluminum alloys can be enhanced by surface hardening performed by micro-arc oxidation (MAO), plasma electrolytic oxidation (PEO) and deposition of hard materials by electroplating [2,3,4,5,6,7,8,9,10,11,12,13], or by thermal spraying of hard coatings based on tungsten, titanium, and tantalum carbides with metal bond

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