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標題: Microstructural evolution in the oxidized chromium nitride coatings prepared by unbalanced magnetron sputtering
作者: Wang, C.C.
Hsieh, W.P.
Shiao, M.H.
Lin, J.H.
Shieu, F.S.
關鍵字: high-temperature oxidation;electroless nickel;hard coatings;tin;coatings;crn coatings;mild-steel;interlayer
Project: Journal of the Electrochemical Society
期刊/報告no:: Journal of the Electrochemical Society, Volume 150, Issue 5, Page(s) B199-B204.
Chromium nitride thin films were deposited by unbalanced magnetron (UBM) sputtering on AISI 304 stainless steel. The oxidation behavior of the nitride-coated steel at elevated temperatures ranging from 300 to 800 degreesC in air for 60 min was characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. It was observed that the surface morphology and the color of the specimens oxidized below 500 degreesC remains similar to the as-deposited specimen, and the coating surface was fully covered by a granular oxide layer at 800 degreesC. Unlike the arc ion-plated chromium nitride coatings, the UBM-prepared coatings contain a small amount of beta-Cr(2)N in the as-deposited specimen besides the CrN phase. Pronounced phase decomposition from CrN into beta-Cr(2)N occurred at temperature above 500 degreesC and the phase transformation was completed at 800 degreesC. Oxidation of the nitrides to form a Cr(2)O(3) oxide layer was observed in the specimen oxidized above 500 degreesC, and the grain size of both the nitrides and the oxide increases with the oxidation temperature. (C) 2003 The Electrochemical Society.
ISSN: 0013-4651
DOI: 10.1149/1.1563649
Appears in Collections:工學院

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