Accelerated durability testing of gas turbine coatings emphasizing oxide-metal interfaces

Stiger, M. J.; Handoko, Riki; Beuth, Jack; Pettit, F. S.; Meier, G. H.

doi:10.1016/b978-008043890-0/50019-5

Cited by 2 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1,2 In TBC system, the bond coat layer exists to provide oxidation protection for the superalloy substrate from the combustion environment and to promote adherence of the ceramic layers of the TBC to the substrate. [2][3][4][5] Two main types of bond coatings are presently in use. One class of bond coat layers is referred to as MCrAlY (M: Ni, Co).…”

Section: Introductionmentioning

confidence: 99%

Processing and microstructure of NiRuAl diffusion barrier coating on Ni-based superalloy

Wang

Guo

Lei

et al. 2011

Surface Engineering

View full text Add to dashboard Cite

Thermal barrier coatings (TBCs), consisting of ceramic topcoat and metallic bond coat, are applied onto Ni-based superalloy hot components in turbine engines to protect the components from high temperature gas. Detrimental phases in the superalloy substrate such as topologically close-packed phase (TCP) and secondary reaction zone (SRZ), resulting from interdiffusion between the bond coat and the substrate, significantly deteriorate the desired mechanical properties of the superalloy substrate. In this paper, a NiRuAl coating was produced onto Nibased superalloy to inhibit the interdiffusion between the coating and substrate. During the processing, a dense and continuous Ru film of around 4 mm thickness was first electrodeposited onto a K3 superalloy at 70uC using a current density of 1?2 A dm 22 . The NiRuAl coating was formed by pack aluminisation of the Ru coated specimen in argon atmosphere at 900uC. The coating shows a two-layered structure: the top layer NiAl and the bottom layer NiRuAl, with the potential functions of diffusion barrier and high temperature oxidation resistance.

show abstract

Section: Introductionmentioning

confidence: 99%

Processing and microstructure of NiRuAl diffusion barrier coating on Ni-based superalloy

Wang

Guo

Lei

et al. 2011

Surface Engineering

View full text Add to dashboard Cite

show abstract

“…The only viable methods have entailed indentation by cones and wedges [1,2]. But these tests are difficult to quantify.…”

Section: Introductionmentioning

confidence: 99%

A Stretch/Bend Method for In Situ Measurement of the Delamination Toughness of Coatings and Films Attached to Substrates

Hutchinson

Evans

2010

Journal of Applied Mechanics

View full text Add to dashboard Cite

A stretch/bend method for the in situ measurement of the delamination toughness of coatings attached to substrates is described. A beam theory analysis is presented that illustrates the main features of the test. The analysis is general and allows for the presence of residual stress. It reveals that the test produces stable extension of delaminations, rendering it suitable for multiple measurements in a single test. It also provides scaling relations and enables estimates of the loads needed to extend delaminations. Finite element calculations reveal that the beam theory solutions are accurate for slender beams, but overestimate the energy release rate for stubbier configurations and short delaminations. The substantial influence of residual stress on the energy release rate and phase angle is highly dependent on parameters such as the thickness and modulus ratio for the two layers. Its effect must be included to obtain viable measurements of toughness. In a companion paper, the method has been applied to a columnar thermal barrier coating deposited onto a Ni-based super-alloy.

show abstract

Accelerated durability testing of gas turbine coatings emphasizing oxide-metal interfaces

Cited by 2 publications

References 7 publications

Processing and microstructure of NiRuAl diffusion barrier coating on Ni-based superalloy

Processing and microstructure of NiRuAl diffusion barrier coating on Ni-based superalloy

A Stretch/Bend Method for In Situ Measurement of the Delamination Toughness of Coatings and Films Attached to Substrates

Contact Info

Product

Resources

About