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 study, chromium based alloys containing a hardening NiAl phase are investigatedfrom 1100°C to 1300°C in air. The influence of the NiAl content and of the Al/Ni ratio onmicrostructure modification and on oxidation behaviour are characterized by metallography andthermogravimetry. Increasing the Al/Ni ratio leads to a higher Al content in the chromium solidsolution but does not modify the amount of primary NiAl. At high temperature, and for NiAlcontent exceeding 16 at%, a duplex oxide layer forms at the surface of the alloys exposed in air,alumina in the inner part, and chromia in the outer part. The oxidation behavior is discussedaccording to oxidation profile and to the thermodynamic predominance diagram of the involvedspecies
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.595-598.117.pdf
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