Abstract
Four-point bend tests of a plasma-sprayed zircon (ZrSiO4) coating are presented, the coating being prepared by atmospheric plasma spraying (APS) spraying onto a titanium alloy substrate, using a water-stabilized plasma (WSP) torch. The mechanical behavior in compression of the coating material is nonlinear, including hysteresis (9% of the maximum strain) and permanent deformation. The effective in-plane Young’s modulus is about 13 GPa for very small strains and doubles for a compressive strain of −0.18%. Possible micromechanisms to explain this behavior are proposed, and some general protocols concerning the testing of plasma-sprayed ceramic coatings are deduced.
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Mr. Harok has since left the Institute of Plasma Physics, and can now be contacted at Bontaz Centre CZ, V. Noveho 973, 33701 Rokycany, Czech Republic.
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Harok, V., Neufuss, K. Elastic and inelastic effects in compression in plasma-sprayed ceramic coatings. J Therm Spray Tech 10, 126–132 (2001). https://doi.org/10.1361/105996301770349592
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DOI: https://doi.org/10.1361/105996301770349592