Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/41745

Title

Mechanical and erosion properties of CaCO3-EMAA thermal sprayed coatings

Author(s)

Yan, Fengyuan Yuan;  Gross, Karlis A.;  Simon, George P.;  Berndt, Christopher C.

Abstract

Polymer-ceramic composite coatings manufactured from calcium carbonate and ethylene-methacrylic acid copolymer (EMAA) were prepared via a thermal spray process employing different CaCO3 filler sizes (average size of 2.8, 9 or 36 μm) and loading levels from about 2.5 to 7 wt%. The optimum filler feeding characteristics, deposition efficiency and deposition rate were obtained with a 36 μm sized CaCO3. Tensile properties, peel strength, and the erosion resistance of a pure EMAA and CaCO3-EMAA composite coatings were Investigated. It was found that the tensile strain at fracture of the composite coating decreased with the addition of filler to a greater degree than that observed in compression-molded polymer composites. This is attributed to an inhomogenous distribution of the filler, with more being concentrated at the boundaries of the deposited polymer particles, thereby establishing a rigid framework within the coating. Only a small filler content is necessary to establish large changes in the mechanical properties of the coating. The peel strength of a composite coating decreases with filler content, both on a mild steel substrate and a previously sprayed polymer coating. Bonding to the latter is significantly higher and offers a possibility as a bonding layer between substrates and composite coatings. The coefficient of friction is lowered with the addition of a filler. Erosion testing has shown that the erosion resistance of PF111 is little improved overall with filler addition, although some increase is found for filler contents less than 5 vol%.

Publication type

Journal article

Source

Polymer Engineering and Science, Vol. 44, no. 8 (Aug 2004), pp. 1448-1459

Publication year

2004

Keyword(s)

Bonding;  Calcium compounds;  Coatings;  Composite materials;  Copolymers;  EMAA;  Epoxy resins;  Erosion;  Erosion resistance;  Ethylene;  Ethylene-methacrylic acid copolymer;  Fillers;  Polymer blends;  Powders;  Strain;  Tensile strain;  Thermal sprayed coatings

Publisher

John Wiley & Sons

ISSN

0032-3888

Publisher URL

http://dx.doi.org/10.1002/pen.20141

Copyright

Copyright © 2004 Society of Plastics Engineers. Publisher does not officially support author/institution self-archiving of either the postprint (final, revised accepted draft) or published version of full text.

Peer reviewed