Properties of aluminum deposited by a HVOF process
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Pure aluminum coatings deposited by a high velocity oxyfuel (HVOF) process have been produced and studied. A simple design-of-experiment (DOE) was used to assess the effect of two deposition parameters, the spray distance and oxygen-to-fuel ratio, on relevant coating properties. Porosity, surface roughness, and micro-hardness of the coatings were measured as responses to changes in the DOE parameters. The results indicated that these three properties of the aluminum coatings were normally insensitive to spray distance. Oxygen-to-fuel ratio, by flow, did appear to affect the porosity level of the coatings. Some post-coat processing of the aluminum coatings and minimization of nozzle loading are discussed.
Keywordsaluminum hardness HVOF porosity roughness
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- 2.F. Génin, J. Menapace, A. Burnham, and I. Stowers: “Damage Thresholds of Painted and Coated Steel, and Other Metals at 1064nm (10-ns),” NIF-000-97-0004472, Lawrence Livermore National Laboratory, Livermore, CA, 1998.Google Scholar
- 3.M.J. Thomas: “Laser Damage Measurement of Flame Sprayed Aluminum Samples,” Report 011100LL, Spica Technologies, Nashua, NH, 2000.Google Scholar
- 4.J. Pryatel, D. Ravizza, and I.F. Stowers: “Surface Cleanliness Validation by Swiping of NIF Components,” LLNL MEL98-012-OD (also NIF5002426), Lawrence Livermore National Laboratory, Livermore, CA, 2001.Google Scholar
- 7.T.Z. Kattamis, M. Chen, R. Huie, J. Kelly, C. Fountzoulas, and M. Levy: “Microstructure, Adhesion, and Tribological Properties of Conventional Plasma-Sprayed Coatings on Steel Substrates,” J. Adhesion Sci. Technol., 1995, 9(7), pp. 907–21.Google Scholar
- 8.R. Chow, T.A. Decker, R.V. Gansert, and D. Gansert: “Characterization of Thermal Sprayed Aluminum and Stainless Steel Coatings for Clean Laser Enclosers,” ASM Materials Solutions Conference and Exposition 2000, Thermal Spray, St. Louis, MO, 9–12 Oct 2000.Google Scholar