OVERVIEW OF CANADIAN COLD SPRAY CONFERENCE
Tuesday, June 29, 2010 at 03:59AM The 2nd Canadian Cold Spray Conference was held in Montreal, Quebec, on June 15 & 16. Over 100 people were in attendance from 9 countries, from as far away as Australia. Speakers from Academia, Industry, and Civilian and Military National Laboratories presented recent work relating to:
- Process modeling
- Process enhancements
- Technology development
- Applications
- Process diagnostics
- Coating characterization
Some of the highlights from the conference included:
- development of the Shock Induced Spraying Process (SISP) a.k.a., WaveRider which accelerates and heats the particles at the same time while retaining its solid state [i]
- analytical modeling showing local melting at the impact interface [ii]
- diagnostic device that allows for simultaneous measurement of individual particle's velocity, size & flux regardless of their temperature [iii]
- electron backscattered diffraction (EBSD) to provide a view of particle deformation within large area of the cold spray deposit [iv]
- indentation and scratch test to determine adhesion and cohesion strengths of cold sprayed splats [v]
- modeling of “water spray” with a droplet size of 10-100 μm [vi]
- cold spray 6061 Al that has 10% greater ultimate tensile and yield strength than wrought 6061 heat treated to the T6 condition [vii]
- cold spray of Cu to form a surface that kills microorganisms[vii]
Since the introduction of cold spray to North America, roughly 15 years ago, this process seems to have proven itself as a good option for restoration or repair of worn or damaged components. [viii], [ix] Cold spray seems to be heading in the right direction with respect to its possible use in the application of sacrificial cathodic protective coatings using conventional [x] and nanostructured feedstock [xi]. The ability to cold spray metals and MMCs to form a dense, oxide-free coating seems to be established. The latest quest seems to be whether the same approach can be used to near-net shape spray form [xii] or repair components that require structural integrity from the deposit. Based on existing findings, this is a possibility that could greatly advance cold spray applications for commercial use.
REFERENCES
[i] Julio Villafuerte, CenterLine, “CENTERLINE-SST Cold Spray Technology and Applications”
[ii] André McDonald, University of Alberta, “Interfacial heating during low-pressure cold-gas dynamic spraying of aluminum coatings”
[iii] Luc Pouliot, Tecnar Automation, “Cold Particles Characterization Techniques Applied to the Cold Spray Process”
[iv] Stephen Yue, McGill University, “Electron Microscope Observations of Cold Sprayed Coatings”
[v] Richard Chromik, McGill Unversity, “Micro- and Nano-mechanical Testing Techniques Applied to Cold Sprayed Coatings and Splats”
[vi] Ali Dolatabadi, Concordia University, “CFD Modeling and Flow Visualization in Cold Spray Process”
[vii] Matthew Trexler, Army Research Lab, USA, “Cold Spray Technology Applications”
[viii] Alexander Shkodkin, OCPS, Russia, Peculiarities of the Gas Dynamic Spay Applications in Russia”
[ix] David Wright, Accuwright Industries, USA, “Practical Applications of Cold Gas-Dynamic Spray”
[x] Edward C. Malisson, CenterLine SST, “Cold Spray Corrosion Mitigation for Nuclear Reactor”
[xi] George E. Kim, Perpetual Technologies, “Cold Spray Nanostructured Aluminum for Corrosion Protection”
[xii] Mahnaz Jahedi, CSIRO, Australia, “Fundamental Studies of Cold Spray Titanium”
George E. Kim, Ph.D.
F.W. Gartner
Perpetual Technologies, Inc.
email: gkim@perpetualtech.ca
George E. Kim Ph.D. in Cold Spray, Diagnostics, Nuclear Fusion
Reader Comments (7)
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