Thermal Shock Testing of Thermal Barrier Coating/Bondcoat Systems

Bolcavage, Ann; Feuerstein, A.; Foster, John F.; Moore, P. G.

doi:10.1361/10599490419883

Cited by 65 publications

(37 citation statements)

References 2 publications

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“…JETS testing [17] was also used in testing of some of the APS TBC coated systems. In this test, disk specimens are loaded onto a large rotating ring and rotated through a series of different positions.…”

Section: Methodsmentioning

confidence: 99%

“…It would also be useful if comparison is made under JETS testing conditions, since FCT is a more severe test for EBPVD TBCs than APS TBCs. [17] …”

Section: A Tbc Failuresmentioning

confidence: 99%

“…Bolcavage et al [17] compared Fig. 6-(a) Failure of an EBPVD TBC system driven by a cyclic instability in the thermally grown oxide layer.…”

Section: Introductionmentioning

confidence: 99%

“…[4] the behavior of several TBCs exposed in a FCT with those exposed in a ''Jet Engine Thermal Simulation'' (JETS) test. Bolcavage et al [17] concluded that the FCT test is best suited for those systems in which bond coat oxidation is intimately involved in the failure process (e.g., EBPVD systems), whereas the JETS test is best suited for those systems where fracture in the topcoat is the primary cause of failure (e.g., thick APS TBCs).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the Failures during Cyclic Oxidation of Yttria-Stabilized (7 to 8 Weight Percent) Zirconia Thermal Barrier Coatings Fabricated via Electron Beam Physical Vapor Deposition and Air Plasma Spray

Yanar

Helminiak

Meier

et al. 2010

Metall Mater Trans A

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The failures during oxidation of electron beam physical vapor deposition (EBPVD) and air plasma spray (APS) yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBCs) on different bond coats, namely, platinum-modified aluminide and NiCoCrAlY, are described. It is shown that oxidation of the bond coats, along with defects existing near the TBC/bond coat interface, plays a very important role in TBC failures. Procedures to improve TBC performance via modifying the oxidation characteristics of the bond coats and removing the as-processed defects are discussed. The influence of exposure conditions on TBC lives is described and factors such as cycle frequency and thermal gradients are discussed.

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Section: Methodsmentioning

confidence: 99%

“…It would also be useful if comparison is made under JETS testing conditions, since FCT is a more severe test for EBPVD TBCs than APS TBCs. [17] …”

Section: A Tbc Failuresmentioning

confidence: 99%

“…Bolcavage et al [17] compared Fig. 6-(a) Failure of an EBPVD TBC system driven by a cyclic instability in the thermally grown oxide layer.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of the Failures during Cyclic Oxidation of Yttria-Stabilized (7 to 8 Weight Percent) Zirconia Thermal Barrier Coatings Fabricated via Electron Beam Physical Vapor Deposition and Air Plasma Spray

Yanar

Helminiak

Meier

et al. 2010

Metall Mater Trans A

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“…(1) A constant temperature distribution in the sample without a gradient in TBC samples. When heating/cooling rates are low, such as the furnace cycling test (FCT), the sample is slowly heated in a furnace, which creates a high-temperature isothermal environment for the entire TBC system, and then it is cooled by the compressed gas or ambient air cooling out of the furnace [60]. (2) The thermal cycling tests with a temperature gradient across the sample due to fast heating/cooling, such as the jet engine thermal shock (JETS) test, laser rig and flame rig [59].…”

Section: Guo Et Al Compared Single Lz and Double-layer Lz-8ysz Coatimentioning

confidence: 99%

Lanthanum zirconate based thermal barrier coatings: A review

Zhang

Guo

Jung

et al. 2017

Surface and Coatings Technology

182

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This review article summarizes the latest information about the manufacturing techniques of lanthanum zirconate (La2Zr2O7, LZ) powder and La2Zr2O7 based thermal barrier coatings (TBCs). Lanthanum zirconate is a promising candidate material for TBC applications, due to its lower thermal conductivity and higher thermal stability compared to other traditional TBC systems. In this work, the physical, thermal, and mechanical properties of the powder and coatings are evaluated. The durability experiments of the TBCs in various thermal, mechanical, and corrosive conditions is also reviewed. In addition, theoretical studies on the powder and coatings properties are presented. Finally, future research directions of lanthanum zirconate as TBC applications are proposed.

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