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 WC/Co interface structures in WC-Co alloys doped with VC, Cr3C2 or ZrC wereexamined by high-resolution electron microscopy (HRTEM) and X-ray energy dispersive spectroscopy(EDS) with a special interest in the segregation behavior of respective dopants at the WC/Co interfaces.It was confirmed that the addition of VC or Cr3C2 were effective to reduce WC grain size while that ofZrC was not. In case of VC or Cr3C2-doped alloys, the morphology of WC grains largely changedcomparing with undoped and ZrC-doped alloys. The WC/Co interfaces of the two alloys tend to formmicro facets with (0001) and {1010} habits. EDS analysis with a sub-nano scale probe revealed thatthe dopants strongly segregated at the two habits. In contrast, such morphology change, and alsodopant segregation, could not be observed in ZrC-doped alloy. In our study, doped ZrC was not foundto solute in Co-phase. Doped ZrC distributed in Co-phase to form other grains mainly consisting ofZrC. The interface structures of WC/Co could be considered to be closely related to the inhibitioneffect to WC grain growth
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.558-559.993.pdf
Permalink
