ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this work we have evaluated the effect of platinum (Pt) pre-coating on microstructureevolution of MCrAlY coating during isothermal oxidation, to improve high temperature oxidationand corrosion resistance of the nickel-based superalloy MAR M247-DS. Pt was deposited on thesuperalloy by electroplating before the MCrAlY coating by a vacuum plasma spray, which wascompared to the superalloy without Pt pre-coating. The samples were subjected to isothermaloxidation in a box furnace at 1100°C for 25–150 hrs. The weight gain and loss caused by theoxidation of samples was recorded, and the variation of surface layer and interface morphology wereobserved before and after the oxidation tests. The length decrement of cross section is remarkably lowon according to the precipitation of (Ni,Pt)Al phase by Pt pre-coating. Also, the amount of voids atinterface between the coating and the superalloy, which would be introduced as a processing defect, isreduced by Pt pre-coating
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.544-545.721.pdf
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