High-speed wear testing of selected ceramics in abrasive slurry

2nd International Conference on Competitive Materials and Technological Processes

Ismailov, Arnold^1 ; Levänen, Erkki^1

Department of Materials Science, Tampere University of Technology, PO Box 589, FIN-33101 Tampere, Finland^1

关键词: Abrasive slurries;    Contact interface;    High speed wear test;    Loading condition;    Partially stabilized zirconia;    Process environment;    Sliding conditions;    Visual inspection;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/47/1/012013/pdf
DOI  :  10.1088/1757-899X/47/1/012013

来源: IOP

【 摘 要 】

Due to increased production speeds in modern process environments, the loading conditions in sliding contact applications have become more challenging. Therefore it is important to have good understanding of wear mechanisms in high-speed sliding conditions. A wear testing device was manufactured for the purpose of cost-efficient simulation of water-containing high-speed sliding conditions. Sliding speeds up to 40 meters per second can be achieved while abrasive-containing slurry is fed into the contact interface of material samples and a rubber coated drum. High-speed wear tests were run with three ceramic materials: silicon nitride, silicon carbide and partially stabilized zirconia. Wear behavior of these ceramics was analyzed as a function of sliding speed and slurry composition. Results indicate that in mild wear region increase in sliding speed reduced overall wear, whereas in severe wear conditions increasing speed accelerated wear. A transition from mild to severe wear was observed for silicon carbide when tested in alumina-containing slurry. For the materials that had high enough hardness, wear rates were dictated by the respective order of fracture toughness. Visual inspection of the worn samples supported the interpretation of wear mode transition.