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Browsing by Author "Isern, Luis"

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Elevated temperature micro-impact testing of TiAlSiN coatings produced by physical vapour deposition

Beake, Ben D.; Bird, Andrew; Isern, Luis; Endrino, José L.; Jiang, Feng (Elsevier, 2019-06-08)

A high temperature micro-impact test has been developed to assess the fracture resistance of hard coatings under repetitive dynamic high strain rate loading at elevated temperatures. The test was used to study the temperature ...
Influence of probe geometry in micro-scale impact testing of nano-multilayered TiAlCrN/NbN coatings deposited on WC-Co

Beake, Ben D.; Bergdoll, L.; Isern, Luis; Endrino, José L.; Fox-Rabinovich, German S.; Veldhuis, Stephen C. (Elsevier, 2020-11-15)

Hard nano-multilayered TiAlCrN/NbN coatings on cemented carbide have shown promise in dry high speed machining applications involving repetitive contact, such as end milling of hardened H13 steel. In this study the fracture ...
Micro-impact testing of AlTiN and TiAlCrN coatings

Beake, Ben D.; Isern, Luis; Endrino, José L.; Fox-Rabinovich, German S. (Elsevier, 2018-11-23)

A novel micro-scale repetitive impact test has been developed to assess the fracture resistance of hard coatings under dynamic high strain rate loading. It is capable of significantly higher impact energies than in the ...
Micro-scale impact resistance of coatings on hardened tool steel and cemented carbide

Beake, Ben D.; Isern, Luis; Endrino, José L.; Liskiewicz, T. W.; Shi, X. (Elsevier, 2020-11-12)

Micro-impact, a novel accelerated test method for assessing coating durability under repetitive contact, has been developed to concentrate impact-induced stresses close to the interfaces in coating systems. Test results ...
Modelling evaporation in electron‑beam physical vapour deposition of thermal barrier coatings

Chevallier, Julie; Isern, Luis; Almandoz Forcen, Koldo; Chalk, Christine; Nicholls, John R. (Springer, 2021-08-18)

This work presents computational models of ingot evaporation for electron-beam physical vapour deposition (EB-PVD) that can be applied to the deposition and development of thermal barrier coatings (TBCs). TBCs are insulating ...
Nano- and micro-scale impact testing of zirconia, alumina and zirconia-alumina duplex optical coatings on glass

Beake, Ben D.; Isern, Luis; Bhattacharyya, Debabrata; Endrino, José L.; Lawson, Ken; Walker, Trevor (Elsevier, 2020-10-06)

Optimising the mechanical properties of optical coatings to improve their durability will be critical if they are to be used successfully in harsh environments where they may be subject to degradation by mechanical contact. ...
Non-destructive thickness measurement of thermal barrier coatings using terahertz radiation

Isern, Luis; Waddie, Andrew J.; Chalk, Christine; Moore, Andrew J.; Nicholls, John R. (Springer, 2021-08-06)

A non-destructive thickness measurement technique based on terahertz (THz) reflectivity was successfully deployed to interrogate 7 wt.% yttria-stabilised zirconia thermal barrier coatings (TBCs) produced by electron-beam ...
Particle distribution, film formation and wear performance of brush plated Ni/WC

Isern, Luis; Impey, Susan A.; Clouser, S. J.; Milosevic, D.; Endrino, José L. (Electrochemical Society, 2018-06-16)

Nickel-matrix composite coatings with tungsten carbide particles were produced by brush electroplating using different current densities and materials of the brush. Non-abrasive materials and high current densities produce ...
Probe geometry and surface roughness effects in microscale impact testing of WC-Co

Beake, Ben D.; Isern, Luis; Harris, A. J.; Endrino, José L. (Taylor & Francis, 2020-05-25)

Depth-sensing repetitive microimpact tests have been performed on cemented carbide cutting tool inserts with spheroconical diamond probes with end radii of 8, 20 and 100 µm. Results were strongly dependent on the probe ...
Structure zone diagram and particle incorporation of nickel brush plated composite coatings

Isern, Luis; Impey, Susan A.; Almond, Heather; Clouser, S. J.; Endrino Armenteros, Jose (Nature Publishing Group, 2017-03-16)

This work studies the deposition of aluminium-incorporated nickel coatings by brush electroplating, focusing on the electroplating setup and processing parameters. The setup was optimised in order to increase the volume ...
Terahertz optical thickness and birefringence measurement for thermal barrier coating defect location

Waddie, Andrew J.; Schemmel, Peter J.; Chalk, Christine; Isern, Luis; Nicholls, John R.; Moore, Andrew J. (Optical Society of America, 2020-10-06)

We present a normal incidence terahertz reflectivity technique to determine the optical thickness and birefringence of yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs). Initial verification of the method ...
Wear-resistant nickel-matrix composite coatings incorporating hard chromium carbide particles

Isern, Luis; Impey, Sue; Milosevic, Danijela; Clouser, Sidney J.; Endrino, José L. (Frontiers, 2024-01-08)

This work evaluates the influence of plating variables on the morphology, composition homogeneity, and abrasive wear resistance of metal matrix composite coatings. A set of Ni/Cr3C2 coatings were brush plated onto steel ...

Browsing by Author "Isern, Luis"

Browsing by Author "Isern, Luis"

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