Production and characterisation of GZ/CYSZ alternative thermal barrier coatings with multilayered and functionally graded designs

Mustafa Guven Gok; Gultekin Goller

doi:10.1016/j.jeurceramsoc.2016.01.036

Production and characterisation of GZ/CYSZ alternative thermal barrier coatings with multilayered and functionally graded designs

Mustafa Guven Gok
, Gultekin Goller^*

^*Bu çalışma için yazışmadan sorumlu yazar

Metalurji ve Malzeme Müh.Böl.

Istanbul Technical University

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

79 Atıf (Scopus)

Özet

In this study multilayered and functionally graded Gd₂Zr₂O₇/CYSZ thermal barrier coatings were designed and produced in 2,4,8, and 12 layers utilizing HVOF and APS processes to improve the thermal cycling performance of single layered Gd₂Zr₂O₇. Microstructural, mechanical, and thermal properties of the coatings were investigated. The phase structure of the Gd₂Zr₂O₇ was stable even after the coating and thermal cycling tests made at 1250 °C. The thermal conductivities and bonding strengths were between in 0.64-0.89 W/mK and 8.87-12.10 MPa, respectively. As far as thermal cycling performance of the designs are concerned while big spallation was observed (74%) in the single layered Gd₂Zr₂O₇ coating after 160 cycles a significant improvement had been observed in cases of multilayered coatings and no failure was seen in functionally graded coatings even after 300 cycles. The results indicated that the thermal cycling performance of Gd₂Zr₂O₇ coating was improved thanks to multilayered and especially functionally graded designs.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	1755-1764
Sayfa sayısı	10
Dergi	Journal of the European Ceramic Society
Hacim	36
Basın numarası	7
DOI'lar	https://doi.org/10.1016/j.jeurceramsoc.2016.01.036
Yayın durumu	Yayınlandı - 1 Haz 2016

Bibliyografik not

Publisher Copyright:
© 2016 Elsevier Ltd.

Finansman

This work was supported by Scientific Research Project Funds of Istanbul Technical University (Project Number: 38102 ) and the Academic Staff Training Program (OYP) of the Council of Higher Education of Turkey. The authors thank Prof. Dr. Yilmaz Taptik, Assoc. Prof. Dr. Ozgul Keles and Hasan Huseyin Sezer for their contributions on thermal spray and characterisation processes.

Finansörler	Finansör numarası
Council of Higher Education of Turkey
Istanbul Teknik Üniversitesi	38102

Belgeye Erişim

10.1016/j.jeurceramsoc.2016.01.036

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Production and characterisation of GZ/CYSZ alternative thermal barrier coatings with multilayered and functionally graded designs",

abstract = "In this study multilayered and functionally graded Gd2Zr2O7/CYSZ thermal barrier coatings were designed and produced in 2,4,8, and 12 layers utilizing HVOF and APS processes to improve the thermal cycling performance of single layered Gd2Zr2O7. Microstructural, mechanical, and thermal properties of the coatings were investigated. The phase structure of the Gd2Zr2O7 was stable even after the coating and thermal cycling tests made at 1250 °C. The thermal conductivities and bonding strengths were between in 0.64-0.89 W/mK and 8.87-12.10 MPa, respectively. As far as thermal cycling performance of the designs are concerned while big spallation was observed (74\%) in the single layered Gd2Zr2O7 coating after 160 cycles a significant improvement had been observed in cases of multilayered coatings and no failure was seen in functionally graded coatings even after 300 cycles. The results indicated that the thermal cycling performance of Gd2Zr2O7 coating was improved thanks to multilayered and especially functionally graded designs.",

keywords = "CYSZ, Functionally graded, GdZrO, Multilayer, Thermal barrier coating",

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

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd.",

year = "2016",

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doi = "10.1016/j.jeurceramsoc.2016.01.036",

language = "English",

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T1 - Production and characterisation of GZ/CYSZ alternative thermal barrier coatings with multilayered and functionally graded designs

AU - Guven Gok, Mustafa

AU - Goller, Gultekin

PY - 2016/6/1

Y1 - 2016/6/1

N2 - In this study multilayered and functionally graded Gd2Zr2O7/CYSZ thermal barrier coatings were designed and produced in 2,4,8, and 12 layers utilizing HVOF and APS processes to improve the thermal cycling performance of single layered Gd2Zr2O7. Microstructural, mechanical, and thermal properties of the coatings were investigated. The phase structure of the Gd2Zr2O7 was stable even after the coating and thermal cycling tests made at 1250 °C. The thermal conductivities and bonding strengths were between in 0.64-0.89 W/mK and 8.87-12.10 MPa, respectively. As far as thermal cycling performance of the designs are concerned while big spallation was observed (74%) in the single layered Gd2Zr2O7 coating after 160 cycles a significant improvement had been observed in cases of multilayered coatings and no failure was seen in functionally graded coatings even after 300 cycles. The results indicated that the thermal cycling performance of Gd2Zr2O7 coating was improved thanks to multilayered and especially functionally graded designs.

AB - In this study multilayered and functionally graded Gd2Zr2O7/CYSZ thermal barrier coatings were designed and produced in 2,4,8, and 12 layers utilizing HVOF and APS processes to improve the thermal cycling performance of single layered Gd2Zr2O7. Microstructural, mechanical, and thermal properties of the coatings were investigated. The phase structure of the Gd2Zr2O7 was stable even after the coating and thermal cycling tests made at 1250 °C. The thermal conductivities and bonding strengths were between in 0.64-0.89 W/mK and 8.87-12.10 MPa, respectively. As far as thermal cycling performance of the designs are concerned while big spallation was observed (74%) in the single layered Gd2Zr2O7 coating after 160 cycles a significant improvement had been observed in cases of multilayered coatings and no failure was seen in functionally graded coatings even after 300 cycles. The results indicated that the thermal cycling performance of Gd2Zr2O7 coating was improved thanks to multilayered and especially functionally graded designs.

KW - CYSZ

KW - Functionally graded

KW - GdZrO

KW - Multilayer

KW - Thermal barrier coating

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DO - 10.1016/j.jeurceramsoc.2016.01.036

M3 - Article

AN - SCOPUS:84956647587

SN - 0955-2219

VL - 36

SP - 1755

EP - 1764

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 7

ER -

Production and characterisation of GZ/CYSZ alternative thermal barrier coatings with multilayered and functionally graded designs

Özet

Bibliyografik not

Finansman

Belgeye Erişim

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