Characterization of Modified Thick Thermal Barrier Coatings

Laboratory testing was conducted on air plasma sprayed (APS) and electron beam-physical vapor deposited (EB-PVD) thermal barrier coatings (TBCs) applied onto nickel alloy specimens. As-coated chemistry, microstructure, and bond strength of the TBC systems were evaluated. Cyclic oxidation tests that simulated industrial gas turbine environments were also conducted on the various thermal barrier coatings. This study evaluated the effects of ceramic and metallic coating compositions and application processes on coatings microstructure and performance. The relative cyclic performance of the TBC systems was determined from the laboratory tests.

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Processing and characterization of CYSZ/Al 2 O 3 and CYSZ/Al 2 O 3 + YSZ multilayered thermal barrier coatings

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2014.07.077 ◽

2014 ◽

Vol 258 ◽

pp. 804-813 ◽

Cited By ~ 18

Author(s):

Mehmet Mumtaz Dokur ◽

Gultekin Goller

Keyword(s):

Thermal Barrier Coatings ◽

Thermal Barrier ◽

Barrier Coatings ◽

Multilayered Thermal Barrier Coatings

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Characterization of the mechanical properties of thermal barrier coatings by 3 points bending tests and modified small punch tests

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2017.09.070 ◽

2017 ◽

Vol 332 ◽

pp. 40-46 ◽

Cited By ~ 5

Author(s):

Pierre Planques ◽

Vanessa Vidal ◽

Philippe Lours ◽

Vincent Proton ◽

Fabrice Crabos ◽

...

Keyword(s):

Mechanical Properties ◽

Thermal Barrier Coatings ◽

Thermal Barrier ◽

Barrier Coatings ◽

Bending Tests ◽

Small Punch

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Thermal Barrier Coatings on the Base of Samarium Zirconates

Production, Properties, and Applications of High Temperature Coatings - Advances in Chemical and Materials Engineering ◽

10.4018/978-1-5225-4194-3.ch004 ◽

2018 ◽

pp. 79-106

Author(s):

Sebastian Oliwer Jucha ◽

Grzegorz Jan Moskal

Keyword(s):

Rare Earth ◽

Thermal Barrier Coatings ◽

Thermal Barrier ◽

Insulation Layer ◽

Barrier Coatings ◽

Alternative Material ◽

Static Oxidation ◽

Tbc Systems ◽

Samarium Zirconate

The zirconates of rare earth elements, such as Sm2Zr2O7, can be an alternative material for zirconia modified by yttria (8YSZ) usually used as an insulation layer in thermal barrier coatings (TBC) systems. This chapter describes the morphology of feedstock zirconate powder, internal morphology and selected properties of different samarium zirconate TBC systems. These included: composite TBC coatings of Sm2Zr2O7 + 8YSZ type with different ratio of both used to coatings deposition powders (25/75, 50/50 and 75/25) as well as the TBC of double ceramic layer (DCL) type with an 8YSZ internal layer and an outer layer of Sm2Zr2O7 type, and a monolayer TBC based on Sm2Zr2O7. Another presented subject is related to the oxidation resistance of TBC systems during static oxidation test at temperature 1100°C. In this case, the special emphasis was taken on the characterization of thermally grown oxides (TGO) zone thickness where the most important phenomena related with overall live-time of TBC systems usually take place.

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