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:
Nb-16Si-24Ti-6Cr-6Al-2Hf-xB(x=0, 0.5, 1, 2, 4, 6) in situ composites were prepared byarc-melting. Microstructure and the effect of boron on 1250[removed info]C oxidation resistance of the compositeswere investigated by scanning electron microscopy(SEM) and X-ray energy disperse spectrum(EDS)as well as X-ray diffraction(XRD). The experimental results showed that the high temperatureoxidation resistance of the alloy was remarkably improved by adding proper amount of boron. Thismay be resulted from several beneficial roles of boron, i.e., boron improves the resistance of Nb5Si3by solid solution strengthening, inhibits the diffusion of oxygen in the matrix, improves the adherencebetween the oxide scale and the substrate and increases the cracking resistance of the oxide scale.[removed info]
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1489.pdf
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