Microstructural, mechanical and thermal properties of Al2O3/CYSZ functionally graded thermal barrier coatings

Fatih Kirbiyik; Mustafa Guven Gok; Gultekin Goller

doi:10.1016/j.surfcoat.2017.08.025

Microstructural, mechanical and thermal properties of Al₂O₃/CYSZ functionally graded thermal barrier coatings

Fatih Kirbiyik
, Mustafa Guven Gok
, Gultekin Goller^*

^*Bu çalışma için yazışmadan sorumlu yazar

Metalurji ve Malzeme Müh.Böl.

Istanbul Technical University
Hakkari University

Araştırma çıktısı: Dergi yayını › Makale › Hakem

47 Atıf (Scopus)

Özet

In this study, CYSZ/Al₂O₃ ceramic TBCs were produced in double layered and FGed design having 4, 8 and 12 layers by high-velocity oxy-fuel and atmospheric plasma spraying processes. Microstructural, mechanical and thermal properties of the TBCs were evaluated. The thickness of metallic bonding layer and ceramic top coat were measured as 100 ± 30 μm and 250 ± 80 μm, respectively. Thermal conductivity value of the coating having 8 layered CYSZ/Al₂O₃ functionally graded design (0.82 W/m·K) were lowest compared to CYSZ/Al₂O₃ double layered (1.32 W/m·K) and CYSZ single layered (1.44 W/m·K) designs at 835 °C. Thermal cycle performance and bonding strength of the CYSZ/Al₂O₃ FGed TBCs were superior to those of single layered CYSZ and double layered CYSZ/Al₂O₃ coatings. Phase transformation from γ-Al₂O₃ to α-Al₂O₃ was observed after the thermal cycle test.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	193-201
Sayfa sayısı	9
Dergi	Surface and Coatings Technology
Hacim	329
DOI'lar	https://doi.org/10.1016/j.surfcoat.2017.08.025
Yayın durumu	Yayınlandı - 25 Kas 2017

Bibliyografik not

Publisher Copyright:
© 2017 Elsevier B.V.

Finansman

This work was supported by the Academic Staff Training Program (OYP) of the Council of Higher Education of Turkey . The authors thank Prof. Dr. Yılmaz Taptik and Hasan Huseyin Sezer for their contributions on thermal spray and characterization process.

Finansörler
Council of Higher Education of Turkey

Belgeye Erişim

10.1016/j.surfcoat.2017.08.025

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Microstructural, mechanical and thermal properties of Al2O3/CYSZ functionally graded thermal barrier coatings",

abstract = "In this study, CYSZ/Al2O3 ceramic TBCs were produced in double layered and FGed design having 4, 8 and 12 layers by high-velocity oxy-fuel and atmospheric plasma spraying processes. Microstructural, mechanical and thermal properties of the TBCs were evaluated. The thickness of metallic bonding layer and ceramic top coat were measured as 100 ± 30 μm and 250 ± 80 μm, respectively. Thermal conductivity value of the coating having 8 layered CYSZ/Al2O3 functionally graded design (0.82 W/m·K) were lowest compared to CYSZ/Al2O3 double layered (1.32 W/m·K) and CYSZ single layered (1.44 W/m·K) designs at 835 °C. Thermal cycle performance and bonding strength of the CYSZ/Al2O3 FGed TBCs were superior to those of single layered CYSZ and double layered CYSZ/Al2O3 coatings. Phase transformation from γ-Al2O3 to α-Al2O3 was observed after the thermal cycle test.",

keywords = "AlO, CYSZ, Functionally graded, Thermal barrier coating, Thermal properties",

author = "Fatih Kirbiyik and Gok, \{Mustafa Guven\} and Gultekin Goller",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

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day = "25",

doi = "10.1016/j.surfcoat.2017.08.025",

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T1 - Microstructural, mechanical and thermal properties of Al2O3/CYSZ functionally graded thermal barrier coatings

AU - Kirbiyik, Fatih

AU - Gok, Mustafa Guven

AU - Goller, Gultekin

PY - 2017/11/25

Y1 - 2017/11/25

N2 - In this study, CYSZ/Al2O3 ceramic TBCs were produced in double layered and FGed design having 4, 8 and 12 layers by high-velocity oxy-fuel and atmospheric plasma spraying processes. Microstructural, mechanical and thermal properties of the TBCs were evaluated. The thickness of metallic bonding layer and ceramic top coat were measured as 100 ± 30 μm and 250 ± 80 μm, respectively. Thermal conductivity value of the coating having 8 layered CYSZ/Al2O3 functionally graded design (0.82 W/m·K) were lowest compared to CYSZ/Al2O3 double layered (1.32 W/m·K) and CYSZ single layered (1.44 W/m·K) designs at 835 °C. Thermal cycle performance and bonding strength of the CYSZ/Al2O3 FGed TBCs were superior to those of single layered CYSZ and double layered CYSZ/Al2O3 coatings. Phase transformation from γ-Al2O3 to α-Al2O3 was observed after the thermal cycle test.

AB - In this study, CYSZ/Al2O3 ceramic TBCs were produced in double layered and FGed design having 4, 8 and 12 layers by high-velocity oxy-fuel and atmospheric plasma spraying processes. Microstructural, mechanical and thermal properties of the TBCs were evaluated. The thickness of metallic bonding layer and ceramic top coat were measured as 100 ± 30 μm and 250 ± 80 μm, respectively. Thermal conductivity value of the coating having 8 layered CYSZ/Al2O3 functionally graded design (0.82 W/m·K) were lowest compared to CYSZ/Al2O3 double layered (1.32 W/m·K) and CYSZ single layered (1.44 W/m·K) designs at 835 °C. Thermal cycle performance and bonding strength of the CYSZ/Al2O3 FGed TBCs were superior to those of single layered CYSZ and double layered CYSZ/Al2O3 coatings. Phase transformation from γ-Al2O3 to α-Al2O3 was observed after the thermal cycle test.

KW - AlO

KW - CYSZ

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KW - Thermal barrier coating

KW - Thermal properties

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M3 - Article

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EP - 201

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

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