NiCr Bağ Kaplamaya Sahip Termal Bariyer Kaplama (TBC) Sisteminin Mekanik Alaşımlama Yöntemi Kullanılarak Üretilen CaO-MgO-Al2O3-SiO2 (CMAS) Tozları ile Korozyon Davranışlarının İncelenmesi

Yıl 2021, Cilt: 25 Sayı: 3, 610 - 617, 30.12.2021

Aslıhan Atar , Yasin Ozgurluk

https://doi.org/10.19113/sdufenbed.888782

Öz

Malzemelerin yüzey özelliklerinin geliştirilmesi ve çevresel şartlara daha iyi uyum sağlayabilmesi amacıyla geçmişten günümüze birçok alanda tercih edilen Termal bariyer kaplamalar (TBCs) uzay ve havacılık sanayisinde yaygın olarak kullanılmaktadır. TBC’ler çalışma koşulları esnasında erozyon, sıcak korozyon, oksidasyon ve CaO-MgO-Al2O3-SiO2 (CMAS) gibi hasar mekanizmalarına maruz kalmaktadır. Tüm bu hasar mekanizmalarından dolayı TBC sistemlerinde dökülmeler ve bozulmalar meydana gelmektedir. Bu çalışmada, Inconel 718 süper alaşım altlık malzeme üzerine NiCr içeriğine sahip metal tozları bağ kaplama olarak, YSZ (ZrO2–8wt.%Y2O3) içeriğine sahip seramik tozlar ise, üst kaplama olarak altlık üzerine kaplanmıştır. Atmosferik Plazma Sprey (APS) yöntemi kullanılarak üretilen TBC sistemleri üretimlerinin ardından, mekanik alaşımla yöntemiyle üretilen CMAS camsı yapısı eşliğinde korozyon testlerine tabi tutulmuşlardır. Gerçekleştirilen CMAS testleri öncesi ve sonrasında TBC sistemlerinin mikroyapısal ve mekaniksel özellikleri ileri karakterizasyon teknikleri kullanılarak incelenmiştir.

Anahtar Kelimeler

Mekanik Alaşımlama, CaO-MgO-Al2O3-SiO2 (CMAS), Termal Bariyer Kaplamalar (TBCs), Atmosferik Plazma Sprey (APS) Kaplama, NiCr

Destekleyen Kurum

TÜBİTAK

Proje Numarası

1919B011803507

Teşekkür

Bu araştırma, Türkiye Bilimsel ve Teknolojik Araştırma Kurumu tarafından (TÜBİTAK) 1919B011803507 başvuru numaralı, 2209-A proje kodu ile mali olarak desteklenmiştir.

Investigation of Corrosion Behavior of Thermal Barrier Coating (TBC) System with NiCr Bond Coating with CaO-MgO-Al2O3-SiO2 (CMAS) Powders Produced Using the Mechanical Alloying Method

Öz

Thermal barrier coatings (TBCs), which are preferred in many areas from past to present, are widely used in the space and aviation industry in order to improve the surface properties of materials and to better adapt to environmental conditions. TBCs are exposed to erosion, hot corrosion, oxidation and damage mechanisms such as CaO-MgO-Al2O3-SiO2 (CMAS) during working conditions. Due to all these damage mechanisms, spills and deteriorations occur in TBC systems. In this study, metal powders with NiCr content were coated on the Inconel 718 superalloy substrate as a bond coating, and ceramic powders with YSZ (ZrO2–8wt.% Y2O3) were coated on the substrate as a top coating. TBC systems produced using the Atmospheric Plasma Spray (APS) method were subjected to corrosion tests after their production, accompanied by the glassy structure of CMAS produced by the mechanical alloy method. Before and after the CMAS tests, the microstructural and mechanical properties of TBC systems were examined using advanced characterization techniques.

Anahtar Kelimeler

Mechanical Alloying, CaO-MgO-Al2O3-SiO2 (CMAS), Thermal Barrier Coatings (TBCs), Atmospheric Plasma Spray (APS) Coating, NiCr

Proje Numarası

1919B011803507

Kaynakça

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