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7篇 您的检索式:作者名="Cockburn Andrew"
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1Performance characterization of Ni60-WC coating on steel processed with supersonic laser deposition显示文摘Ni60-WC particles are used to improve the wear resistance of hard-facing steel due to their high hardness. An emerging technology that combines laser with cold spraying to deposit the hard-facing coatings is known as supersonic laser deposition. In this study, Ni60-WC is deposited on low-carbon steel using SLD. The microstructure and performance of the coatings are investigated through SEM, optical microscopy, EDS, XRD, microhardness and pin-on-disc wear tests. The experimental results of the coating processed with the optimal parameters are compared to those of the coating deposited using laser cladding.Fang LUO Andrew COCKBURN Martin SPARKES Rocco LUPOI Zhi-jun CHEN William O'NEILL Jian-hua YAO Rong LIU 2015Defence Technology(防务技术)2015,11,1:11
2Hardfacing steel with nanostructured coatings of Stellite-6 by supersonic laser deposition显示文摘The ability to manufacture coatings is critical to engineering design. Many components require the application of additional layers toenhance mechanical properties and protect against hostile environments. Supersonic laser deposition (SLD) is a novel coating methodbased on cold spray (CS) principles. In this technique, the deposition velocities can be significantly lower than those required foreffective bonding in CS applications. The addition of laser heat energy permits a change in the thermodynamic experience of impactingparticles, thereby offering a greater opportunity for efficient bonding at lower velocities as compared with the CS process. The workreported in this paper demonstrates the ability of the SLD process to deliver hardfacing materials to engineering surfaces. Stellite-6 hasbeen deposited on low-carbon steel tubes over a range of process parameters to establish the appropriate target power and traversespeeds for the coating formation. The coating properties and parameters were examined to determine the primary characteristics andgrain structure size. Their morphology and performance were studied through optical microscopy, scanning electron microscope(SEM), X-ray diffraction, hardness measurements and wear testing. The results have shown that SLD is capable of depositing layers ofStellite-6, with properties that are superior to those of their conventionally manufactured counterparts.Rocco Lupoi Andrew Cockburn Chris Bryan Martin Sparkes Fang Luo William O’Neill 2012Light(Science & Applications)2012,1,1:8
3Characteristics of Stellite 6 Deposited by Supersonic Laser Deposition Under Optimized Parameters显示文摘Stellite 6 powders were deposited on low carbon steel using SLD (supersonic laser deposition) under optimized parameters. The structure, line scan of elements and porosity of coating were examined and analyzed using SEM (scanning electron microscope), OM (optical microscope) and XRD (X-ray diffraction). The adhesion strength between coating and substrate was tested by PAT-ADHESION/TENSILE and E900STM adhesive. The results showed the deposition characteristics of optimized coating with N2 at a pressure of 3.0 MPa, a temperature of 450 ℃ and a laser power of 1.5 kW were compared with those of Stellite 6 coating deposited by the HVOF (high velocity oxygen fuel).LUO Fang Lupoi Rocco Cockburn Andrew Sparkes Martin O'neill William YAO Jian-hua 2013Journal of Iron and Steel Research(International)2013,20,2:4
4The La- ser Assisted Cold Spray Process and Deposit Characterization 显示文摘Bray Matthew Cockburn Andrew O'Neill William 2009Surface and Coatings Technology2009,203,:1
5The La- ser-Assisted Cold Spray Process 显示文摘Cockburn Andrew Bray Matthew O'Neill William 2008The Laser User2008,53,:1
6The laser-as- sisted cold spray process显示文摘Andrew Cockburn Matthew Bray William O'Neill 2008The Laser User2008,53,:1
7Nitrite in feed: From Animal health to human health显示文摘Andrew Cockburn Gianfranco Brambilla Maria-Luisa Fernández Davide Arcella Luisa R. Bordajandi Bruce Cottrill Carlos van Peteghem Jean-Lou Dorne 2013Toxicology and Applied Pharmacology2013,,3:1
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