Determination of selected properties and fracture toughness of HVOF coatings

Landová, Mariana; Brezinová, Janette

doi:10.1515/kom-2016-0024

Cited by 2 publications

(2 citation statements)

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“…When researchers characterize the wear resistance of coatings, they mostly utilize the pin-on-disc test or dry-sand/rubber-wheel test; there is a lack of information on WC-WB-Co and WC-FeCrAl behavior under dry-pot wear tests at different sample angles. To determine the quality of the coatings, tests aimed at determining the corrosion resistance and adhesive, abrasive, and erosive wear of as-sprayed coatings after thermal cycles were selected [3][4][5][31][32][33][34]. The corrosion properties of the coatings were determined using potentiodynamic polarization tests in simulated acid rain (SAR) and NaCl solution.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Wear Behavior and Corrosion Resistance of WC-FeCrAl and WC-WB-Co Coatings

Brezinová

Landová

Guzanová

et al. 2018

Metals

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The paper is focused on investigating the quality of two grades of thermally sprayed coatings deposited by high-velocity oxygen fuel (HVOF) technology. One grade contains WC hard particles in an environmentally progressive Ni-and Co-free FeCrAl matrix, while the second coating contains WC and WB hard particles in a cobalt matrix. The aim of the experimental work was to determine the effect of thermal cyclic loading on the coatings' resistance to adhesive, abrasive and erosive wear. Abrasive wear was evaluated using abrasive cloth of two grit sizes, and erosive wear was evaluated by a dry-pot wear test in a pin mill at two sample angles. Adhesion wear resistance of the coatings was determined by a sliding wear test under dry friction conditions and in a 1 mol water solution of NaCl. Corrosion resistance of the coatings was evaluated using potentiodynamic polarization tests. Metallographic cross-sections were used for measurement of the microhardness and thickness and for line energy-dispersive X-ray (EDX) analysis. The tests proved the excellent resistance of both coatings against adhesive, abrasive, and erosive wear, as well as the ability of the WC-WB-Co coating to withstand alternating temperatures of up to 600 • C. The "green carbide" coating (WC-FeCrAl) can be recommended as an environmentally friendly replacement for Ni-and Co-containing coatings, but its operating temperature is strictly limited to 500 • C in air.

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Section: Introductionmentioning

confidence: 99%

Microstructure, Wear Behavior and Corrosion Resistance of WC-FeCrAl and WC-WB-Co Coatings

Brezinová

Landová

Guzanová

et al. 2018

Metals

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“…In spite of the steady range of powders for thermal spraying, new materials [3][4][5] are developed and scientist permanently experiment in this area. One way to change the properties of coatings and adapt them to a specific application is to change the type of carbide, change the matrix composition, change the volume content of carbide in the matrix [6][7][8][9][10][11][12][13]. It is also considered that also the reduction in the particle size of the powder used may lead to improvements in some properties.…”

Section: Introductionmentioning

confidence: 99%

Properties of coatings created by HVOF technology using micro-and nano-sized powder

Guzanová

Brezinová

Draganovská

et al. 2019

Koroze a Ochrana Materialu

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The paper focuses on assessment the resistance of hot-sprayed coatings applied by HVOF technology (WC–Co–Cr created using powder of two different grain sizes) against erosive wear by dry-pot wear test in a pin mill at two sample angles. As these coatings are designated for the environment with varying elevated temperatures and often are in contact with the abrasive, the coatings have been subjected to thermal cyclic loading and their erosive resistance has been determined in as-sprayed condition and after the 5th and 10th thermal cycles. The corrosion resistance of coatings was evaluated by linear polarization (Tafel analysis).

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Determination of selected properties and fracture toughness of HVOF coatings

Cited by 2 publications

References 10 publications

Microstructure, Wear Behavior and Corrosion Resistance of WC-FeCrAl and WC-WB-Co Coatings

Microstructure, Wear Behavior and Corrosion Resistance of WC-FeCrAl and WC-WB-Co Coatings

Properties of coatings created by HVOF technology using micro-and nano-sized powder

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