Ref.: MCoFsu17-001
Apresentador: KAUE BERTUOL
Autores (Instituição): BERTUOL, K.(Concordia University); Arendarchuck, B.E.(Concordia University); Rivadeneira, F.(Concordia University); Stoyanov, P.(Concordia University);
Resumo:
Abradable materials are commonly employed as clearance control materials within gas turbine engines to minimize the clearance between the stationary and rotating parts, which in turn, improves efficiency and operational safety. Thermally sprayed abradable coatings are generally composite materials (e.g. aluminum-polyester, aluminum-boron nitrite) referred to as sacrificial materials, protecting the blade tips from wear during incursion. There is limited work focusing on the wear mechanisms within the abradable coatings-blade tip interaction as well as the interfacial processes under application-relevant contact conditions. Thus, the main purpose of this study is to investigate novel thermally sprayed abradable materials under tribological methodologies to assess them in terms of wear resistance and their interactions with the counter materials. These methodologies have the capability of evaluating different abradable coating systems, using a wide range of inputs and outputs, such as blade speed, incursion rates, incursion depths, contact forces, cutting temperatures, and roughness of the wear track. Throughout this study, different thermal spray abradable coatings are explored in terms of their wear behaviour. Ex-situ analysis is performed on the worn surfaces in order to provide a better understanding of the interfacial processes for the various abradable systems.