Microstructural Characterization of Several Coatings Deposited on TiAlNb Intermetallic Alloy

• Autorzy: Góral M. , Pytel M. , Dychtoń K.

Identyfikatory

DOI

10.2478/amm-2014-0262

Warianty tytułu

PL

Charakterystyka mikrostruktury wybranych warstw wytworzonych na podłożu stopu tytanu na osnowie fazy międzymetalicznej TiAlNb

• Języki publikacji: EN

Abstrakty

EN

Titanium alloys based on the γ -TiAl intermetallic phase are a type of material which may replace nickel supperalloys in high temperature applications. Not enough resistance to corrosion at temperatures above 900°C remains the biggest limitation in industrial practices. The paper presents results of preliminary research into application of new type heat resistant coatings on the basis of γ -TiAl alloy. MeCrAlY and Si coatings were formed by pack cementation method. Aluminide coatings were deposited by pack cementation method and VPA. Research results have shown that except for the coating formed by VPA, coatings were characterized by high porosity and therefore would not ensure appropriate protection against oxidation. Further research will be necessary into application of the VPA method in protecting γ-TiAl titanium alloys in order to improve their heat resistance.

PL

Stopy na osnowie fazy międzymetalicznej γ-TiAl stanowią materiał, który może stanowić zamiennik nadstopów niklu w aplikacjach wysokotemperaturowych. Nadal największym ograniczeniem w ich przemysłowym zastosowaniu jest niewystarczająca odporność na utlenianie w temperaturze powyzej 900°C. W artykule przedstawiono wyniki wstępnych badań nad zastosowaniem nowych rodzajów powłok żaroodpornych na podłożu stopu γ-TiAl. Wytworzono powłoki MeCrAlY oraz Si metodą zawiesinową a także powłoki aluminidkowe metodą pack cementation oraz VPA. Wyniki badań wykazały że poza powłoką wytworzoną metodą VPA pozostałe charakteryzowały się dużą porowatością przez co nie moga zapewnić odpowiedniej ochrony przed utlenianiem. Wskazano na konieczność dalszych badań nad zastosowaniem metody VPA do ochrony stopów tytanu γ-TiAl w celu poprawy ich żaroodporności.

Słowa kluczowe

EN

TiAl intermetallics; slurry coatings; pack cementation; vapour phase aluminizing

PL

związki międzymetaliczne TiAl; zawiesiny; pack cementation; powłoki aluminidkowe

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2014
• Tom: Vol. 59, iss. 4
• Strony: 1547--1551
• Opis fizyczny: Bibliogr. 27 poz., rys., tab.

Twórcy

autor

Góral M.

• Rzeszów University of Technology, Department of Materials Science, Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Pytel M.

• Rzeszów University of Technology, Department of Materials Science, Powstańców Warszawy 12, 35-959 Rzeszów, Poland

autor

Dychtoń K.

• Rzeszów University of Technology, Department of Materials Science, Powstańców Warszawy 12, 35-959 Rzeszów, Poland

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