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Copyright of Chemical Industry / Hemijska Industrija is the property of Association of Chemical Engineers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In this study, the aim was to deposit layers of the Ni22Cr10Al1Y coating using the vacuum plasma spray process to protect gas turbine engine components from oxidation and high-temperature corrosion. The coating can significantly affect the properties of the substrate because it forms a composite together with the substrate. The type of the coating deposition process and coating heat treatment, together with the substrate, significantly affect its resistance to high temperature creep. Ni22Cr10Al1Y powder was deposited with a vacuum plasma spray system of the Plasma Technik - AG company using the control panel A-2000 and the plasma gun F4. The coating deposited on the substrate of INCONEL X-750 alloy was thermally treated at 1100º C for 2 hours in a protective atmosphere of argon. The particle morphology was tested by scanning electron microscopy.The microhardness of layers was tested by the HV0.3 method and the bond strength was tensile tested, in accordance with the standard Pratt & Whitney. The microstructure of the deposited coating layers was examined under a light microscope. Coating etching was done by mixing 2.5ml of nitric acid HNO3 with 7.5ml of hydrofluoric acid HF. The microstructure of the etched coating before and after heat treatment, as well as the thickness of the diffusion zone, were analysed under a light microscope, based on which the coating quality was later assessed. / В данной статье описан процесс нанесения покрытия Ni22Cr10Al1Y вакуумным плазменным напылением для защиты деталей газотурбинного двигателя от оксидирования и высокотемпературной коррозии. Покрытие может оказать значительное воздействие на свойства субстрата, так как вместе с ним создает композит. Течение процесса депозиции покрытия и режим термической обработки с субстратом значительно влияют на стойкость слоев покрытия к высокотемпературной ползучести. Нанесение порошка Ni22Cr10Al1Y произведено аппаратом вакуум плазменного напыления от производителя Plasma Technik – AG, включающим пульт управления А-2000 и плазматрон F4. Покрытие нанесено на субстрат сплава INCONEL X-750, затем произведена двухчасовая техническая обработка при 11000 C в защитной среде аргона. Морфология частиц порошка испытана методом оптической микроскопии. Анализ механических характеристик покрытия проведен на основании испытаний микротвердости методом HV0.3 и прочности соединений методом растяжения. Микротвердость покрытия соответствуют требованиям стандартов Pratt & Whitney. Микроструктура слоев нанесенного покрытия испытана методом световой микроскопии. Повреждения покрытия вызваны раствором азотной кислоты 2.5ml HNO3 с 7.5ml плавиковой кислоты. Анализ микроструктуры повреждений покрытия до и после термической обработки, а также толщины диффузной части проведен методом световой микроскопии, на основании результатов анализа дана оценка качества покрытия. / Cilj rada jeste da se vakuum-plazma-sprej procesom deponuju slojevi prevlake Ni22Cr10Al1Y za zaštitu komponenti gasnih turbina od oksidacije i visokotemperaturne korozije. Prevlaka može znatno uticati na svojstva substrata, jer zajedno sa substratom formira kompozit. Vrsta procesa depozicije prevlake i režim termičke obrade prevlake sa substratom bitno utiču na njenu otpornost na visokotemperaturno puzanje. Deponovanje praha Ni22Cr10Al1Y urađeno je vakuum-plazma-sprej sistemom firme Plasma Technik - AG koji koristi komandni pult A-2000 i plazma pištoljem F4. Prevlaka deponovana na substratu od legure INCONEL X-750 termički je obrađena na 11000C u trajanju od 2 sata u zaštitnoj atmosferi argona. Morfologija čestica praha ispitana je metodom skening elektronske mikroskopije. Ispitivanja mikrotvrdoće slojeva rađena su metodom HV0.3 i čvrstoće spoja metodom ispitivanja na zatezanje, koja su bila u skladu sa standardom Pratt & Whitney. Mikrostruktura slojeva prevlake u deponovanom stanju ispitana je na svetlosnom mikroskopu. Nagrizanje prevlake rađeno je mešanjem azotne kiseline 2,5 ml HNO3 sa 7,5 ml fluorovodonične kiseline HF. Analiza mikrostrukture nagrizene prevlake pre i posle termičke obrade, kao i debljina difuzione zone, izvedena je na svetlosnom mikroskopu, na osnovu čega je ocenjen kvalitet prevlake.

Copyright of Chemical Industry / Hemijska Industrija is the property of Association of Chemical Engineers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)