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:
The erosion-oxidation (E-O) behavior of high velocity oxy fuel (HVOF) sprayedNi20Cr alloy as well as WC and Cr3C2 cermet coatings on a steel substrate were studied. TheE-O tests were carried out in a rig with specimen assemblies that were rotated through afluidized bed of erodent particles in the temperature range 500-850°C and with erodentimpact velocities of 2.5-19.5 ms-1. Alumina powder (~200Am) was used as the erodent. TheE-O resistance of the coatings was determined as wastage, as a function of temperature. Thethree coatings did not exhibit any significant change in E-O at temperatures up to 500-600°C.At higher temperatures, wastage increased with temperature, reached a maximum at 700°Cand then decreased with further increase in temperature. Different E-O regimes wereidentified. The specimen surfaces were examined in a scanning electron microscope and theirroughness determined. E-O maps have been drawn that define conditions under which thecoatings undergo low, moderate and severe wastage
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.530-531.117.pdf
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