کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1661291 1008422 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of yttrium incorporation on the oxidation resistance of Cr–Al–N coatings
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
The effect of yttrium incorporation on the oxidation resistance of Cr–Al–N coatings
چکیده انگلیسی

Cr–Al–N hard coatings exhibit considerable oxidation resistance due to the formation of stable, dense α-(Al,Cr)2O3 mixed oxide scales, which makes them promising candidates for advanced machining and other high temperature applications. Here, the effect of Y on the oxidation resistance of magnetron sputtered Cr–Al–N coatings with Al/Cr ratios close to 1.2 and Y-contents of 0, 1, 2, and 4 at.%, corresponding to YN mole fractions of 0, 2, 4, and 8% is studied. The oxidation resistance is investigated under isothermal and dynamic conditions up to 1400 °C. Structure and morphology of the oxidized films are studied by X-ray diffraction and electron microscopy. Based on our results we can conclude that Y incorporation has a considerable impact on the oxidation performance of the (Cr1 − xAlx)1 − yYyN films studied. Coatings with 2 and 4 mol% YN show significantly lower weight gains during isothermal oxidation and hence exhibit a higher oxidation resistance than Y-free Cr–Al–N films. However, YN-mole fractions > 4% are found to be detrimental to the oxidation resistance, as fast growing, porous oxide scales are formed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 202, Issue 24, 15 August 2008, Pages 5870–5875
نویسندگان
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