Outstanding cavitation erosion resistance of Ultra High Molecular Weight Polyethylene (UHMWPE) coatings

The resistance to cavitation erosion of Ultra High Molecular Weight Polyethylene (UHMWPE) coatings with two molecular weight 0.6 and 10.5Mg/mol was tested in a hydrodynamic tunnel during 98h at a flow velocity of about 90m/s. This polymer is known to have an excellent wear resistance. These material...

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Bibliographic Details
Published in:Wear 2015-04, Vol.328-329, p.301-308
Main Authors: Deplancke, Tiana, Lame, Olivier, Cavaille, Jean-Yves, Fivel, Marc, Riondet, Michel, Franc, Jean-Pierre
Format: Article
Language:English
Subjects:
Cavitation
Cavitation erosion
Coating
Coatings
Electron beam melting
Flow velocity
Fluid mechanics
Mechanics
Molecular weight
Physics
Polyethylenes
Polymer
Tensile tests
UHMWPE
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Summary:The resistance to cavitation erosion of Ultra High Molecular Weight Polyethylene (UHMWPE) coatings with two molecular weight 0.6 and 10.5Mg/mol was tested in a hydrodynamic tunnel during 98h at a flow velocity of about 90m/s. This polymer is known to have an excellent wear resistance. These materials were processed by sintering on a metallic substrate textured by electron beam melting to ensure mechanical interlocking. UHMWPE with molecular weight 10.5Mg/mol has an exceptional resistance to cavitation erosion superior to that of stainless steel A2205 whereas UHMWPE with molecular weight 0.6Mg/mol has a resistance to cavitation erosion similar to that of a conventional Nickel Aluminum Bronze alloy (in term of erosion depth). Two possible explanations are put forward for the good cavitation resistance of UHMWPE with highest molecular weight: the tensile test in semi-crystalline state shows no strain localization and, above melting temperature, the disentanglement of UHMWPE with molecular weight 10.5Mg/mol is very slow unlike the UHMWPE with molecular weight 0.6Mg/mol which tends to flow. [Display omitted] •Resistance to cavitation erosion of UHMWPE was evaluated in a cavitation tunnel.•Two UHMWPE with different molecular weights (0.6 and 10.5Mg/mol) were tested.•UHMWPE with 10.5Mg/mol has an exceptional resistance to cavitation erosion.
ISSN:0043-1648
1873-2577
DOI:10.1016/j.wear.2015.01.077