Thermal fatigue behavior of air-plasma sprayed thermal barrier coating with bond coat species in cyclic thermal exposure

Zhe Lu, Sang Won Myoung, Yeon Gil Jung, Govindasamy Balakrishnan, Jeongseung Lee, Ungyu Paik

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The effects of the bond coat species on the delamination or fracture behavior in thermal barrier coatings (TBCs) was investigated using the yclic thermal fatigue and thermal-shock tests. The interface microstructures of each TBC showed a good condition without cracking or delamination after flame thermal fatigue (FTF) for 1429 cycles. The TBC with the bond coat prepared by the air-plasma spray (APS) method showed a good condition at the interface between the top and bond coats after cyclic furnace thermal fatigue (CFTF) for 1429 cycles, whereas the TBCs with the bond coats prepared by the high-velocity oxygen fuel (HVOF) and low-pressure plasma spray (LPPS) methods showed a partial cracking (and/or delamination) and a delamination after 780 cycles, respectively. The TBCs with the bond coats prepared by the APS, HVOF and LPPS methods were fully delaminated (>50%) after 159, 36, and 46 cycles, respectively, during the thermal-shock tests. The TGO thickness in the TBCs was strongly dependent on the both exposure time and temperature difference tested. The hardness values were found to be increased only after the CFTF, and the TBC with the bond coat prepared by the APS showed the highest adhesive strength before and after the FTF.

Original languageEnglish
Pages (from-to)3387-3403
Number of pages17
JournalMaterials
Volume6
Issue number8
DOIs
StatePublished - 2013 Sep 25

Fingerprint

Thermal fatigue
Thermal barrier coatings
Sprayed coatings
Plasmas
Delamination
Air
Thermal shock
Furnaces
Oxygen
Hot Temperature
Adhesives
Hardness
Microstructure

Keywords

  • Air-plasma spray
  • Bond coat
  • Cyclic thermal exposure
  • Thermal barrier coating
  • Thermal durability
  • Thermal-shock

Cite this

Lu, Zhe ; Myoung, Sang Won ; Jung, Yeon Gil ; Balakrishnan, Govindasamy ; Lee, Jeongseung ; Paik, Ungyu. / Thermal fatigue behavior of air-plasma sprayed thermal barrier coating with bond coat species in cyclic thermal exposure. In: Materials. 2013 ; Vol. 6, No. 8. pp. 3387-3403.
@article{16d103bb399d45cc8d9fdab466d88315,
title = "Thermal fatigue behavior of air-plasma sprayed thermal barrier coating with bond coat species in cyclic thermal exposure",
abstract = "The effects of the bond coat species on the delamination or fracture behavior in thermal barrier coatings (TBCs) was investigated using the yclic thermal fatigue and thermal-shock tests. The interface microstructures of each TBC showed a good condition without cracking or delamination after flame thermal fatigue (FTF) for 1429 cycles. The TBC with the bond coat prepared by the air-plasma spray (APS) method showed a good condition at the interface between the top and bond coats after cyclic furnace thermal fatigue (CFTF) for 1429 cycles, whereas the TBCs with the bond coats prepared by the high-velocity oxygen fuel (HVOF) and low-pressure plasma spray (LPPS) methods showed a partial cracking (and/or delamination) and a delamination after 780 cycles, respectively. The TBCs with the bond coats prepared by the APS, HVOF and LPPS methods were fully delaminated (>50{\%}) after 159, 36, and 46 cycles, respectively, during the thermal-shock tests. The TGO thickness in the TBCs was strongly dependent on the both exposure time and temperature difference tested. The hardness values were found to be increased only after the CFTF, and the TBC with the bond coat prepared by the APS showed the highest adhesive strength before and after the FTF.",
keywords = "Air-plasma spray, Bond coat, Cyclic thermal exposure, Thermal barrier coating, Thermal durability, Thermal-shock",
author = "Zhe Lu and Myoung, {Sang Won} and Jung, {Yeon Gil} and Govindasamy Balakrishnan and Jeongseung Lee and Ungyu Paik",
year = "2013",
month = "9",
day = "25",
doi = "10.3390/ma6083387",
language = "English",
volume = "6",
pages = "3387--3403",
journal = "Materials",
issn = "1996-1944",
number = "8",

}

Thermal fatigue behavior of air-plasma sprayed thermal barrier coating with bond coat species in cyclic thermal exposure. / Lu, Zhe; Myoung, Sang Won; Jung, Yeon Gil; Balakrishnan, Govindasamy; Lee, Jeongseung; Paik, Ungyu.

In: Materials, Vol. 6, No. 8, 25.09.2013, p. 3387-3403.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Thermal fatigue behavior of air-plasma sprayed thermal barrier coating with bond coat species in cyclic thermal exposure

AU - Lu, Zhe

AU - Myoung, Sang Won

AU - Jung, Yeon Gil

AU - Balakrishnan, Govindasamy

AU - Lee, Jeongseung

AU - Paik, Ungyu

PY - 2013/9/25

Y1 - 2013/9/25

N2 - The effects of the bond coat species on the delamination or fracture behavior in thermal barrier coatings (TBCs) was investigated using the yclic thermal fatigue and thermal-shock tests. The interface microstructures of each TBC showed a good condition without cracking or delamination after flame thermal fatigue (FTF) for 1429 cycles. The TBC with the bond coat prepared by the air-plasma spray (APS) method showed a good condition at the interface between the top and bond coats after cyclic furnace thermal fatigue (CFTF) for 1429 cycles, whereas the TBCs with the bond coats prepared by the high-velocity oxygen fuel (HVOF) and low-pressure plasma spray (LPPS) methods showed a partial cracking (and/or delamination) and a delamination after 780 cycles, respectively. The TBCs with the bond coats prepared by the APS, HVOF and LPPS methods were fully delaminated (>50%) after 159, 36, and 46 cycles, respectively, during the thermal-shock tests. The TGO thickness in the TBCs was strongly dependent on the both exposure time and temperature difference tested. The hardness values were found to be increased only after the CFTF, and the TBC with the bond coat prepared by the APS showed the highest adhesive strength before and after the FTF.

AB - The effects of the bond coat species on the delamination or fracture behavior in thermal barrier coatings (TBCs) was investigated using the yclic thermal fatigue and thermal-shock tests. The interface microstructures of each TBC showed a good condition without cracking or delamination after flame thermal fatigue (FTF) for 1429 cycles. The TBC with the bond coat prepared by the air-plasma spray (APS) method showed a good condition at the interface between the top and bond coats after cyclic furnace thermal fatigue (CFTF) for 1429 cycles, whereas the TBCs with the bond coats prepared by the high-velocity oxygen fuel (HVOF) and low-pressure plasma spray (LPPS) methods showed a partial cracking (and/or delamination) and a delamination after 780 cycles, respectively. The TBCs with the bond coats prepared by the APS, HVOF and LPPS methods were fully delaminated (>50%) after 159, 36, and 46 cycles, respectively, during the thermal-shock tests. The TGO thickness in the TBCs was strongly dependent on the both exposure time and temperature difference tested. The hardness values were found to be increased only after the CFTF, and the TBC with the bond coat prepared by the APS showed the highest adhesive strength before and after the FTF.

KW - Air-plasma spray

KW - Bond coat

KW - Cyclic thermal exposure

KW - Thermal barrier coating

KW - Thermal durability

KW - Thermal-shock

UR - http://www.scopus.com/inward/record.url?scp=84884361761&partnerID=8YFLogxK

U2 - 10.3390/ma6083387

DO - 10.3390/ma6083387

M3 - Article

AN - SCOPUS:84884361761

VL - 6

SP - 3387

EP - 3403

JO - Materials

JF - Materials

SN - 1996-1944

IS - 8

ER -