Effect of palladium diffusion in coatings deposited on the nickel based superalloy

• Autorzy: Zagula-Yavarska M. , Sieniawski J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In this paper the effect of palladium diffusion in coatings deposited on the surface of nickel based superalloy was evaluated. Design/methodology/approach: The palladium coatings 3 and 7 μm thick were deposited by the electroplating process on Inconel 713 LC Ni-base superalloy. The heat treatment of electroplated coatings at the temperature 1050°C for 2 h under argon atmosphere was performed. The microstructure investigations of the heat treated coatings were conduced by the use of optical microscope (Nikon Epiphot 300) and a scanning electron microscope (Hitachi S-3400N) equipped with an Energy Dispersive Spectroscope EDS (VOYAGER of NORAN INSTRUMENTS). The phase composition was identified by X-ray (ARL X'TRAX) diffractometer. The surface roughness parameter - Ra of heat treated coatings was evaluated by Perthometer S2 MAHR equipment. Findings: The microstructure of 3 žm thick palladium electroplated coating after diffusion treatment consists of three phases: AlPd2, Ni3Al, Ni0,52Pd0,475. The increase of palladium thickness from 3 to 7 μm does not influence the phase composition of heat treated coatings. Heat treatment of palladium electroplating coatings increases the surface roughness parameter Ra. Research limitations/implications: The results will be used in the future investigations to explain the influence of palladium on the oxidation resistance of aluminide coatings. Practical implications: The palladium electroplating coatings after heat treatment and aluminizing process may be used as an alternative to platinum modified aluminide coatings as coatings for turbine blades of aircraft engines. Originality/value: The paper includes the results of microstructure and surface roughness investigations of palladium electroplating coatings 3 and 7 μm thick after diffusion treatment.

Słowa kluczowe

EN

Inconel 713 LC; palladium; electroplating; diffusion treatment; surface roughness

PL

Inconel 713 LC; pallad; galwanotechnika; obróbka dyfuzyjna; chropowatość powierzchni

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2011
• Tom: Vol. 52, nr 2
• Strony: 69--73
• Opis fizyczny: Bibliogr. 13 poz.

Twórcy

autor

Zagula-Yavarska M.

autor

Sieniawski J.

• R&D Laboratory for Aerospace Materials, Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland,

Bibliografia

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