Abstract No.:
2634

 Scheduled at:
Thursday, September 29, 2011, Saal A 11:15 AM
Young Professionals


 Title:
Optimization of cold sprayed pure titanium coatings

 Authors:
Wilson Wong* / McGill University, Canada
Eric Irissou / National Research Council Canada - Industrial Materials Institute, Canada
Jean-Gabriel Legoux/ National Research Council Canada - Industrial Materials Institute, Canada
Stephen Yue/ McGill University, Canada

 Abstract:
The goal of this research is the commercial development of cold spray as a new manufacturing technique in the aerospace industry to produce titanium-based parts. Cold spraying titanium (Ti) coatings with suitable mechanical and microstructural properties for aerospace related applications is challenging. Various process parameters must be carefully considered as these could affect the resultant coating properties significantly. This research focuses on optimizing and improving the overall quality of cold sprayed Ti coatings. In order to study coating property development, various gas temperatures and pressures were used to achieve a wide range of particle impact velocities. In addition, different gases, particularly nitrogen and helium were employed. Powders with different particle size distributions and morphologies were used. In-flight particle diagnostics were performed and coatings were assessed for microhardness, deposition efficiency, porosity, and bonding properties. In addition, particle and substrate temperatures were evaluated from CFD and infrared thermography, respectively. Results showed that both particle impact velocity and particle impact temperature play an important role on the overall quality of the cold sprayed Ti coatings. With optimized spray parameters, a fully dense cold sprayed Ti coating was achieved.

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