Diffusion behaviour of Pt in platinum aluminide coatings during thermal cycles

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

Two-phase PtAl 2 +β-(Ni,Pt)Al and single-phase β-(Ni,Pt)Al coatings were fabricated on DD5 Ni-based superalloy and pure Ni substrates. A coating/pure Ni substrate system was studied to determine the diffusion behaviour of Pt in the Ni–Al–Pt ternary system. The evolutions of morphology, phases and component concentration during thermal cycles were analysed. It was found that there is a phase shift from PtAl 2 to β* in the two-phase coating, and Kirkendall porosity was observed in the single-phase coating. Our results further indicated that there are two different diffusion paths of Pt in the Ni–Al–Pt system.

Most cited references 27

Record: found
Abstract: not found
Article: not found

Surface rumpling of a (Ni, Pt)Al bond coat induced by cyclic oxidation

D.R. Clarke, V.K Tolpygo (2000)

0 comments Cited 17 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: not found

Multifunctional coating interlayers for thermal-barrier systems

T.M. Pollock, D.M Lipkin, K.J. Hemker (2012)

The complex thermochemical and thermomechanical environments in high temperature propulsion and energy generation systems often demand the use of suites of materials with disparate properties. Unique combinations of materials that simultaneously function to optimize mechanical, thermal, and environmental properties can enable breakthroughs in design and system capability. This article focuses on interlayers that function as environmental barriers and promote adhesion of the ceramic thermal barriers to metallic substrates. The structure, composition, processing, and performance of major classes of bond coatings are briefly reviewed. Challenges for the development of new coating systems and for prediction of their performance in service are addressed.