Journal ArticleDOI
Role of platinum in aluminide coatings
TLDR
In this article, the role of platinum in aluminide coatings on selected nickel-based superalloys was investigated using various microscopy, spectroscopy and diffraction techniques.Abstract:
An investigation has been carried out to determine the role of platinum in aluminide coatings on selected nickel-based superalloys. Various microscopy, spectroscopy and diffraction techniques were used to characterize the microstructure. It is found that platinum improves the protective nature of the coating by (1) increasing its diffusional stability, (2) eliminating chromium-rich precipitates from the outer coating layer and (3) preventing refractory transition elements such as molybdenum, vanadium and tungsten from diffusing into the outer coating layer. However, the oxidation behaviour of the coating varies from one alloy substrate to another depending upon its chemical composition and, in particular, the rare earth elements.read more
Citations
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Journal ArticleDOI
Microstructure and high temperature oxidation behavior of Pt-modified aluminide bond coats on Ni-base superalloys
TL;DR: In this paper, a comprehensive review of the Pt-modified aluminide bond coatings is presented, which includes traditional β-(Ni,Pt)Al bond coats as well as the Ptmodified γ-γ′ type of bond coats that have gained prominence in more recent times.
Journal ArticleDOI
Effects of Pt incorporation on the isothermal oxidation behavior of chemical vapor deposition aluminide coatings
TL;DR: In this article, the effects of Pt incorporation on the isothermal oxidation and diffusion behavior of low-sulfur aluminide bond coatings were investigated, and it was concluded that the major beneficial effect of the incorporation of Pt was the elimination of void growth at the oxide-metal interface.
Journal ArticleDOI
Degradation of the platinum aluminide coating on CMSX4 at 1100 °C
J.H. Chen,J.A. Little +1 more
TL;DR: In this article, the interdiffusion behavior of a Pt-aluminide coating on CMSX4 was investigated in air at 1100 °C for up to 600 h. During exposure, platinum and aluminium in the coating diffused inward into the substrate while nickel in the substrate of CMS X4 diffused outward into the coating.
Journal ArticleDOI
Effect of Quaternary Additions on the Oxidation Behavior of Hf-Doped NiAl
TL;DR: In this article, the effects on the oxidation behavior of elements that are commonly present in low-activity aluminide bond coatings on single-crystal, Ni-base superalloys were examined in cyclic and isothermal exposures at 1100 to 1200°C.
Journal ArticleDOI
Role of Pt content in the microstructural development and oxidation performance of Pt–aluminide coatings produced using a high-activity aluminizing process
TL;DR: In this article, the effect of Pt content on the microstructure of Pt-aluminide coatings produced using a single-step high-activity aluminizing process was highlighted.
References
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Journal ArticleDOI
Oxidation of Ni ‐ Cr ‐ Al Alloys Between 1000° and 1200°C
C. S. Giggins,F. S. Pettit +1 more
TL;DR: In this article, the oxidation of alloys in 0.1 atm of oxygen has been studied at temperatures of 1000°, 1100°, and 1200°C, and it was found that all of the alloys initially underwent a period of transient oxidation before steady state conditions were established.
Journal ArticleDOI
The Growth of Hematite Blades during the High Temperature Oxidation of Iron
TL;DR: In this paper, it is suggested that the blades grow by surface diffusion of iron cations from the underlying magnetite through the tunnels to the blade tips; some lateral growth occurs by diffusion of these cations in the twin planes.
Journal ArticleDOI
The aluminization of platinum and platinum-coated IN-738
TL;DR: The chemistry and morphology of aluminide coatings formed on platinum and platinum-coated IN-738 have been studied in this article, where a series of intermetallic Pt-Al compounds form.
Journal ArticleDOI
Corrosion resistant modified aluminide coatings
R. Streiff,D. H. Boone +1 more
TL;DR: In this article, a review of the literature on the corrosion behavior of chromium and platinum modified coatings is reviewed and updated in light of the structural dependence of corrosion resistance for both coating types.
Journal ArticleDOI
The Effect of Zirconium on the Isothermal Oxidation of Nominal Ni ‐ 14Cr ‐ 24Al Alloys
TL;DR: In this paper, the isothermal oxidation of Ni-14Cr-24Al-xZr-type alloys was performed in still air at 1100, 1150, and 1200 C for times up to 200 hr.
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Surface rumpling of a (Ni, Pt)Al bond coat induced by cyclic oxidation
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