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:
Composite metastable Ti0.5Al0.5N, Ti0.49Al0.49Y0.02N and Ti0.48Al0.48Y0.04N coatings weredeposited on a wrought martensite steel 1Cr11Ni2W2MoV for aero-engine compressor blades by arcion plating respectively all coatings possessed a dense surface and the same B1NaCl phase structureand the lattice parameter increased with increase of the incorporated element Y. Oxidation-resistanceof (Ti,Al,Y)N coatings at 800[removed info] for up to 500 hr was investigated and the results showed that theintroduction of yttrium into the coatings dramastically improved the oxidation-resistance of thecoatings in air. The presence of Y in the nitride coatings suppresses the outer diffusion of Fe throughthe nitride coating. And the oxide of yttrium may segregate to the grain boundaries of oxides,suppressing the outward diffusion of metallic elements in coating and the inward diffusion of oxygen.Besides, the existence of adequate Y in the coatings is in favor of suppression of the growth of oxidecrystals, formation layered oxide scale and decrease of compressive stress of oxidation
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1789.pdf
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