Facilitating TiB2 for filtered vacuum cathodic arc evaporation

Simple item page
dc.contributor.authorBrzezinka, Tomasz L.
dc.contributor.authorRao, Jeff
dc.contributor.authorPaiva, Jose M.
dc.contributor.authorAzkona, Ibon
dc.contributor.authorKohlscheen, Joern
dc.contributor.authorFox-Rabinovich, German S.
dc.contributor.authorVeldhuis, Stephen C.
dc.contributor.authorEndrino, José L.
dc.date.accessioned2020-04-21T14:03:12Z
dc.date.available2020-04-21T14:03:12Z
dc.date.issued2020-03-06
dc.description.abstractTiB2 is well established as a superhard coating with a high melting point and a low coefficient of friction. The brittle nature of borides means they cannot be utilised with arc evaporation, which is commonly used for the synthesis of hard coatings as it provides a high deposition rate, fully ionised plasma and good adhesion. In this work, TiB2 conical cathodes with non-standard sintering additives (carbon and TiSi2) were produced, and the properties of the base material, such as grain structure, hardness, electrical resistivity and composition, were compared to those of monolithic TiB2. The dependence of the produced cathodes’ electrical resistivity on temperature was evaluated in a furnace with an argon atmosphere. Their arc–evaporation suitability was assessed in terms of arc mobility and stability by visual inspection and by measurements of plasma electrical potential. In addition, shaping the cathode into a cone allowed investigation of the influence of an axial magnetic field on the arc spot. The produced cathodes have a bulk hardness of 23–24 GPa. It has been found that adding 1 wt% of C ensured exceptional arc-spot stability and mobility, and requires lower arc current compared to monolithic TiB2. However, poor cathode utilization has been achieved due to the steady generation of cathode flakes. The TiB2 cathode containing 5 wt% of TiSi2 provided the best balance between arc-spot behaviour and cathode utilisation. Preventing cathode overheating has been identified as a main factor to allow high deposition rate (±1.2 µm/h) from TiB2-C and TiB2-TiSi2 cathodes.en_UK
dc.identifier.citationBrzezinka TL, Rao J, Paiva JM, et al., (2020) Facilitating TiB2 for filtered vacuum cathodic arc evaporation, Coatings, Volume 10, Issue 3, March 2020, Article number 244en_UK
dc.identifier.issn2079-6412
dc.identifier.urihttps://doi.org/10.3390/coatings10030244
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/15405
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectTiB2en_UK
dc.subjectTiB2-Cen_UK
dc.subjectTiB2-TiSi2en_UK
dc.subjectSEMen_UK
dc.subjectEDSen_UK
dc.subjectXPSen_UK
dc.subjectmillingen_UK
dc.subjectaluminiumen_UK
dc.titleFacilitating TiB2 for filtered vacuum cathodic arc evaporationen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
filtered_vacuum_cathodic_arc_evaporation-2020.pdf
Size:
3.42 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.63 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SATM)