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:
Two types of Ni-base nanocomposites were prepared by co-deposition of Ni withnano-sized particles of Cr or CeO2, respectively. Both Ni-Cr and Ni-CeO2 nanocomposites weremainly composed of nanocrystalline Ni matrix, in which certain content of nanoparticles of Cr orCeO2 randomly dispersed. The Ni-Cr nanocomposite was used as a precursor for preparing a novelhard Ni/CrN coating by plasma nitriding at 560oC. The Ni-CeO2 nanocomposite was used as aprecursor to develop a novel oxidation-resistant chromia-forming coating by low temperaturechromizing using a conventional pack-cementation method. The microhardness of the nitrided layeron the Ni-Cr nanocomposite and the oxidation resistance of the chromizing coating on the Ni-CeO2nanocomposite were both greatly increased, in comparison to the corresponding counterparts, whichwere obtained by plasma nitriding on a conventional coarse-grained Ni-Cr alloy with similar Crcontent and by chromizing on a coarse-grained Ni metal, respectively. The relationships among themicrostructures of the nanocomposite precursors and the nitrided/or chromized coatings, and theirproperties were investigated and discussed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.522-523.331.pdf
