Thermal cyclic life of functionally-graded gadolinium zirconate/yitria stabilized zirconia thermal barrier coating

Azril Dahari Johari, Abreeza Noorlina Abd. Manap, Salmi Mohd Yunus

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, two types of thermal barrier coatings (TBC); duplex and functionally-graded coatings were deposited on superalloy Nimonic 263 substrates using air plasma spray process. The duplex coating consists of YSZ top coat and NiCrAlY bond coat. The functionally-graded coating consists of five layers with GZ as top layer, GZ+YSZ and YSZ+NiCrAlY as intermediate layers. The TBC samples were subjected to isothermal heat treatment at 1100 °C for 100 hours before undergoing thermal cyclic tests at 1200 °C up to 20% spallation to evaluate the oxidation and thermal fatigue resistance of the coatings. Results indicate that the functionally-graded GZ TBC has a better cyclic life than the duplex YSZ TBC after isothermal heat treatment. The isothermal heat treatment also improved the thermal cyclic lifetime of the functionally-graded GZ TBC by more than threefold in comparison to the as-sprayed GZ TBC.

Original languageEnglish
Title of host publicationASM International - International Thermal Spray Conference, ITSC 2018
EditorsTanvir Hussain, Kentaro Shinoda, Fardad Azarmi, Filofteia-Laura Toma, Hua Li, Timothy Eden, Kantesh Balani
PublisherASM International
Pages35-41
Number of pages7
ISBN (Electronic)9781510880405
Publication statusPublished - 01 Jan 2018
EventInternational Thermal Spray Conference, ITSC 2018 - Orlando, United States
Duration: 07 May 201810 May 2018

Publication series

NameProceedings of the International Thermal Spray Conference
Volume2018-May

Conference

ConferenceInternational Thermal Spray Conference, ITSC 2018
CountryUnited States
CityOrlando
Period07/05/1810/05/18

Fingerprint

Thermal barrier coatings
Gadolinium
gadolinium
zirconium oxides
Zirconia
coatings
Coatings
yttria-stabilized zirconia
Heat treatment
heat treatment
Thermal fatigue
Sprayed coatings
Superalloys
Hot Temperature
zirconium oxide
thermal fatigue
Fatigue of materials
Plasmas
heat resistant alloys
spallation

All Science Journal Classification (ASJC) codes

  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Johari, A. D., Abd. Manap, A. N., & Yunus, S. M. (2018). Thermal cyclic life of functionally-graded gadolinium zirconate/yitria stabilized zirconia thermal barrier coating. In T. Hussain, K. Shinoda, F. Azarmi, F-L. Toma, H. Li, T. Eden, & K. Balani (Eds.), ASM International - International Thermal Spray Conference, ITSC 2018 (pp. 35-41). (Proceedings of the International Thermal Spray Conference; Vol. 2018-May). ASM International.
Johari, Azril Dahari ; Abd. Manap, Abreeza Noorlina ; Yunus, Salmi Mohd. / Thermal cyclic life of functionally-graded gadolinium zirconate/yitria stabilized zirconia thermal barrier coating. ASM International - International Thermal Spray Conference, ITSC 2018. editor / Tanvir Hussain ; Kentaro Shinoda ; Fardad Azarmi ; Filofteia-Laura Toma ; Hua Li ; Timothy Eden ; Kantesh Balani. ASM International, 2018. pp. 35-41 (Proceedings of the International Thermal Spray Conference).
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abstract = "In this study, two types of thermal barrier coatings (TBC); duplex and functionally-graded coatings were deposited on superalloy Nimonic 263 substrates using air plasma spray process. The duplex coating consists of YSZ top coat and NiCrAlY bond coat. The functionally-graded coating consists of five layers with GZ as top layer, GZ+YSZ and YSZ+NiCrAlY as intermediate layers. The TBC samples were subjected to isothermal heat treatment at 1100 °C for 100 hours before undergoing thermal cyclic tests at 1200 °C up to 20{\%} spallation to evaluate the oxidation and thermal fatigue resistance of the coatings. Results indicate that the functionally-graded GZ TBC has a better cyclic life than the duplex YSZ TBC after isothermal heat treatment. The isothermal heat treatment also improved the thermal cyclic lifetime of the functionally-graded GZ TBC by more than threefold in comparison to the as-sprayed GZ TBC.",
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Johari, AD, Abd. Manap, AN & Yunus, SM 2018, Thermal cyclic life of functionally-graded gadolinium zirconate/yitria stabilized zirconia thermal barrier coating. in T Hussain, K Shinoda, F Azarmi, F-L Toma, H Li, T Eden & K Balani (eds), ASM International - International Thermal Spray Conference, ITSC 2018. Proceedings of the International Thermal Spray Conference, vol. 2018-May, ASM International, pp. 35-41, International Thermal Spray Conference, ITSC 2018, Orlando, United States, 07/05/18.

Thermal cyclic life of functionally-graded gadolinium zirconate/yitria stabilized zirconia thermal barrier coating. / Johari, Azril Dahari; Abd. Manap, Abreeza Noorlina; Yunus, Salmi Mohd.

ASM International - International Thermal Spray Conference, ITSC 2018. ed. / Tanvir Hussain; Kentaro Shinoda; Fardad Azarmi; Filofteia-Laura Toma; Hua Li; Timothy Eden; Kantesh Balani. ASM International, 2018. p. 35-41 (Proceedings of the International Thermal Spray Conference; Vol. 2018-May).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Thermal cyclic life of functionally-graded gadolinium zirconate/yitria stabilized zirconia thermal barrier coating

AU - Johari, Azril Dahari

AU - Abd. Manap, Abreeza Noorlina

AU - Yunus, Salmi Mohd

PY - 2018/1/1

Y1 - 2018/1/1

N2 - In this study, two types of thermal barrier coatings (TBC); duplex and functionally-graded coatings were deposited on superalloy Nimonic 263 substrates using air plasma spray process. The duplex coating consists of YSZ top coat and NiCrAlY bond coat. The functionally-graded coating consists of five layers with GZ as top layer, GZ+YSZ and YSZ+NiCrAlY as intermediate layers. The TBC samples were subjected to isothermal heat treatment at 1100 °C for 100 hours before undergoing thermal cyclic tests at 1200 °C up to 20% spallation to evaluate the oxidation and thermal fatigue resistance of the coatings. Results indicate that the functionally-graded GZ TBC has a better cyclic life than the duplex YSZ TBC after isothermal heat treatment. The isothermal heat treatment also improved the thermal cyclic lifetime of the functionally-graded GZ TBC by more than threefold in comparison to the as-sprayed GZ TBC.

AB - In this study, two types of thermal barrier coatings (TBC); duplex and functionally-graded coatings were deposited on superalloy Nimonic 263 substrates using air plasma spray process. The duplex coating consists of YSZ top coat and NiCrAlY bond coat. The functionally-graded coating consists of five layers with GZ as top layer, GZ+YSZ and YSZ+NiCrAlY as intermediate layers. The TBC samples were subjected to isothermal heat treatment at 1100 °C for 100 hours before undergoing thermal cyclic tests at 1200 °C up to 20% spallation to evaluate the oxidation and thermal fatigue resistance of the coatings. Results indicate that the functionally-graded GZ TBC has a better cyclic life than the duplex YSZ TBC after isothermal heat treatment. The isothermal heat treatment also improved the thermal cyclic lifetime of the functionally-graded GZ TBC by more than threefold in comparison to the as-sprayed GZ TBC.

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M3 - Conference contribution

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A2 - Hussain, Tanvir

A2 - Shinoda, Kentaro

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A2 - Li, Hua

A2 - Eden, Timothy

A2 - Balani, Kantesh

PB - ASM International

ER -

Johari AD, Abd. Manap AN, Yunus SM. Thermal cyclic life of functionally-graded gadolinium zirconate/yitria stabilized zirconia thermal barrier coating. In Hussain T, Shinoda K, Azarmi F, Toma F-L, Li H, Eden T, Balani K, editors, ASM International - International Thermal Spray Conference, ITSC 2018. ASM International. 2018. p. 35-41. (Proceedings of the International Thermal Spray Conference).