Research on Nano layer coating application for the improvement of the resistance to cavitation erosion has been discussed. The coating was accomplished by Arc PVD method where the substrate was an aluminum alloy namely duralumin. A vibratory cavitation device at a constant amplitude was used to conduct the cavitation test on the coated and reference samples. The surface characterization during the incubation period was carried out with the help of a confocal microscope. The effect of roughness on the duration of the incubation period was analyzed and the failure mode was studied to examine the coating's behavior under cavitation. To better understand the response of the coatings to cavitation, further surface characterization was performed using SEM and Brinell hardness tester. This technique allows us to understand the failure mode of the coating and the influence of the different parameters that can affect the cavitation resistance. The influence of substrate hardness on the cavitation resistance was analyzed and discussed. The substrate's change in hardness is due to the coating process. For this reason, the influence of temperature and time during the application of the coating on the resistance to cavitation is discussed. All the data obtained from measurement were compared against a raw sample, which shows that the resistance of the coated samples all decreased. This is due to the change in the alloy's property during the coating process, which is explained in the chapter labeled discussion.
Anotace v angličtině
Research on Nano layer coating application for the improvement of the resistance to cavitation erosion has been discussed. The coating was accomplished by Arc PVD method where the substrate was an aluminum alloy namely duralumin. A vibratory cavitation device at a constant amplitude was used to conduct the cavitation test on the coated and reference samples. The surface characterization during the incubation period was carried out with the help of a confocal microscope. The effect of roughness on the duration of the incubation period was analyzed and the failure mode was studied to examine the coating's behavior under cavitation. To better understand the response of the coatings to cavitation, further surface characterization was performed using SEM and Brinell hardness tester. This technique allows us to understand the failure mode of the coating and the influence of the different parameters that can affect the cavitation resistance. The influence of substrate hardness on the cavitation resistance was analyzed and discussed. The substrate's change in hardness is due to the coating process. For this reason, the influence of temperature and time during the application of the coating on the resistance to cavitation is discussed. All the data obtained from measurement were compared against a raw sample, which shows that the resistance of the coated samples all decreased. This is due to the change in the alloy's property during the coating process, which is explained in the chapter labeled discussion.
Klíčová slova
Cavitation, Coating, Incubation period, Arc PVD
Klíčová slova v angličtině
Cavitation, Coating, Incubation period, Arc PVD
Rozsah průvodní práce
62
Jazyk
AN
Anotace
Research on Nano layer coating application for the improvement of the resistance to cavitation erosion has been discussed. The coating was accomplished by Arc PVD method where the substrate was an aluminum alloy namely duralumin. A vibratory cavitation device at a constant amplitude was used to conduct the cavitation test on the coated and reference samples. The surface characterization during the incubation period was carried out with the help of a confocal microscope. The effect of roughness on the duration of the incubation period was analyzed and the failure mode was studied to examine the coating's behavior under cavitation. To better understand the response of the coatings to cavitation, further surface characterization was performed using SEM and Brinell hardness tester. This technique allows us to understand the failure mode of the coating and the influence of the different parameters that can affect the cavitation resistance. The influence of substrate hardness on the cavitation resistance was analyzed and discussed. The substrate's change in hardness is due to the coating process. For this reason, the influence of temperature and time during the application of the coating on the resistance to cavitation is discussed. All the data obtained from measurement were compared against a raw sample, which shows that the resistance of the coated samples all decreased. This is due to the change in the alloy's property during the coating process, which is explained in the chapter labeled discussion.
Anotace v angličtině
Research on Nano layer coating application for the improvement of the resistance to cavitation erosion has been discussed. The coating was accomplished by Arc PVD method where the substrate was an aluminum alloy namely duralumin. A vibratory cavitation device at a constant amplitude was used to conduct the cavitation test on the coated and reference samples. The surface characterization during the incubation period was carried out with the help of a confocal microscope. The effect of roughness on the duration of the incubation period was analyzed and the failure mode was studied to examine the coating's behavior under cavitation. To better understand the response of the coatings to cavitation, further surface characterization was performed using SEM and Brinell hardness tester. This technique allows us to understand the failure mode of the coating and the influence of the different parameters that can affect the cavitation resistance. The influence of substrate hardness on the cavitation resistance was analyzed and discussed. The substrate's change in hardness is due to the coating process. For this reason, the influence of temperature and time during the application of the coating on the resistance to cavitation is discussed. All the data obtained from measurement were compared against a raw sample, which shows that the resistance of the coated samples all decreased. This is due to the change in the alloy's property during the coating process, which is explained in the chapter labeled discussion.
Klíčová slova
Cavitation, Coating, Incubation period, Arc PVD
Klíčová slova v angličtině
Cavitation, Coating, Incubation period, Arc PVD
Zásady pro vypracování
A research of the thin coating technologies for the improvement of the cavitation resistance of technical materials
The description of key parameters influencing the cavitation resistance of the thin coating
The assembly of an experimental setup for the testing of the cavitation resistance
The preparation of samples with the different configurations of thin coatings
The cavitation resistance testing of selected samples
The evaluation of the results and classification of the most influencing parameters from experiment
The recommendation of the best thin coating configuration and a recommendation for the applications
Zásady pro vypracování
A research of the thin coating technologies for the improvement of the cavitation resistance of technical materials
The description of key parameters influencing the cavitation resistance of the thin coating
The assembly of an experimental setup for the testing of the cavitation resistance
The preparation of samples with the different configurations of thin coatings
The cavitation resistance testing of selected samples
The evaluation of the results and classification of the most influencing parameters from experiment
The recommendation of the best thin coating configuration and a recommendation for the applications
Seznam doporučené literatury
KIM, Ki-Han, Georges CHAHINE, Jean-Pierre FRANC a Ayat KARIMI. Advanced experimental and numerical techniques for cavitation erosion prediction. Dordrecht: Springer, [2014]. Fluid mechanics and its applications, v. 106.
FRANC, Jean-Pierre a Jean-Marie MICHEL. Fundamentals of cavitation. Boston: Kluwer Academic Publishers, c2004. ISBN 1402022328.
BRENNEN, Christopher E. Cavitation and bubble dynamics. New York: Cambridge University Press, c2014. ISBN 978-1-107-64476-2.
ALICJA, Krella a Andrzej CZYZNIEWSKI. Cavitation erosion resistance of Cr-N coating deposited on stainless steel. Wear. 2006, 260(11), 1324-1332. DOI: 10.1016/j.wear.2005.09.018.
Seznam doporučené literatury
KIM, Ki-Han, Georges CHAHINE, Jean-Pierre FRANC a Ayat KARIMI. Advanced experimental and numerical techniques for cavitation erosion prediction. Dordrecht: Springer, [2014]. Fluid mechanics and its applications, v. 106.
FRANC, Jean-Pierre a Jean-Marie MICHEL. Fundamentals of cavitation. Boston: Kluwer Academic Publishers, c2004. ISBN 1402022328.
BRENNEN, Christopher E. Cavitation and bubble dynamics. New York: Cambridge University Press, c2014. ISBN 978-1-107-64476-2.
ALICJA, Krella a Andrzej CZYZNIEWSKI. Cavitation erosion resistance of Cr-N coating deposited on stainless steel. Wear. 2006, 260(11), 1324-1332. DOI: 10.1016/j.wear.2005.09.018.
Přílohy volně vložené
No
Přílohy vázané v práci
ilustrace, grafy, tabulky
Převzato z knihovny
Ano
Plný text práce
Přílohy
Posudek(y) oponenta
Hodnocení vedoucího
Záznam průběhu obhajoby
Průběh obhajoby je zveřejněn pouze přihlášenému uživateli.