Recent progress in precision machining and surface finishing of tungsten carbide hard composite coatings

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dc.contributor.authorMicallef, Christian
dc.contributor.authorZhuk, Yuri
dc.contributor.authorAria, Adrianus Indrat
dc.date.accessioned2020-08-11T09:09:35Z
dc.date.available2020-08-11T09:09:35Z
dc.date.issued2020-07-25
dc.description.abstractOwing to their high hardness, fracture toughness and oxidation resistance, tungsten carbide (WC) coatings are extensively deposited on parts that operate in demanding applications, necessitating wear, erosion, and corrosion resistance. The application of thick and hard WC coatings has an inevitable effect on the original dimensions of the parts, affecting the geometrical tolerances and surface roughness. The capability of achieving a sub-micron surface finish and adhere to tight geometrical tolerances accurately and repeatably is an important requirement, particularly with components that operate in high-precision sliding motion. Meeting such requirements through conventional surface finishing methods, however, can be challenging due to the superior mechanical and tribological properties of WC coatings. A brief review into the synthesis techniques of cemented and binderless WC coatings is presented together with a comprehensive review into the available techniques which are used to surface finish WC-based coatings with reference to their fundamental mechanisms and capabilities to process parts with intricate and internal features. The binderless WC/W coating considered in this work is deposited through chemical vapour deposition (CVD) and unlike traditional cemented carbide coatings, it has a homogenous coating structure. This distinctive characteristic has the potential of eliminating key issues commonly encountered with machining and finishing of WC-based coatings. Here, six contact and non-contact surface finishing techniques, include diamond turning, precision grinding, superfinishing, vibratory polishing, electrical discharge machining, and electropolishing are discussed along with their current use in industry and limitations. Key challenges in the field are highlighted and potential directions for future investigation, particularly on binderless WC coatings, are proposed hereinen_UK
dc.identifier.citationMicallef C, Zhuk Y, Aria I. (2020) Recent progress in precision machining and surface finishing of tungsten carbide hard composite coatings. Coatings, Volume 10, Issue 8, July 2020, Article number 731en_UK
dc.identifier.issn2079-6412
dc.identifier.urihttps://doi.org/10.3390/coatings10080731
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15656
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectsurface roughnessen_UK
dc.subjectsurface finishingen_UK
dc.subjectprecision machiningen_UK
dc.subjecttungsten carbide coatingsen_UK
dc.titleRecent progress in precision machining and surface finishing of tungsten carbide hard composite coatingsen_UK
dc.typeArticleen_UK

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