|
4642 |
|
Tuesday, May 10, 2016, Auditorium 3:50 PM Young Professionals Session |
|
In-flight particle diagnostics and control for the production of thermally sprayed babbitt coatings |
|
Alexandre Nascimento* / Concordia University, Canada Fadhel Ben Ettouil / Concordia University, Canada Christian Moreau/ Concordia University, Canada Sylvio Savoie/ Institut de recherche d'Hydro-Québec, Canada Robert Schulz/ Institut de recherche d'Hydro-Québec, Canada |
|
High-Sn bearing alloys have been used for over a century in different industries due to their unique tribological properties. While traditionally applied by casting, the thermal spray technique has gained its space in the bearing manufacturing market due to its high productivity and flexibility especially when it comes to the repair of components. Regardless of such facts, different spray techniques and process parameters are used for the production of Babbitt coatings and little is known of their effects on the bearings performance. The present work reports the results of using the AccuraSpray and DPV-2000 diagnostic systems to characterize in-flight Babbitt particle characteristics during the production of HVOF coatings. Those characteristics were correlated with process deposition efficiency as well as the coatings general structure including porosity, intermetallic phase distribution and hardness. The tribological behavior of the coatings was evaluated with a pin-on-disk apparatus and compared with a commercial flame spray coating. HVOF coatings of 100 ¼m thickness were produced. A significant refinement of intermetallic phase distribution was obtained, resulting in superior mechanical and tribological performances when compared with commercial flame-spray coating. |