Thermal cyclic response of EB PVD yttria-stabilized [formula omitted] coatings

Thermal cyclic tests were conducted with plane corset-type specimens from five superalloys with EB PVD ZrO 2 + 8wt.%Y 2O 3 CoCrAlY two and three with (plastic layer) layers coatings. Testing of specimens made of differently deformed and cast alloys with three-layer coatings has shown the efficiency...

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Bibliographic Details
Published inThin solid films Vol. 270; no. 1; pp. 247 - 252
Main Authors Rybnikov, A.I., Getsov, L.B., Malashenko, I.S.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.1995
Subjects
Coatings
Deposition process
Physical vapour deposition
Work function
Work function
Physical vapour deposition
Coatings
Deposition process
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Summary:Thermal cyclic tests were conducted with plane corset-type specimens from five superalloys with EB PVD ZrO 2 + 8wt.%Y 2O 3 CoCrAlY two and three with (plastic layer) layers coatings. Testing of specimens made of differently deformed and cast alloys with three-layer coatings has shown the efficiency of the plastic layer. The characteristic feature of the ceramic layer obtained with appropriate regard for the procedure of its application is safe adhesion between the ceramic and metallic layers, as was revealed during testing. Spallation of the ceramic layer was not observed before the destruction of specimens, when there was no cracks formation in the layers and when there appeared single and multiple cracks. Variants of damage formation and damage growth in multilayer coatings were considered.
ISSN:0040-6090
1879-2731
DOI:10.1016/0040-6090(96)80072-1