Grain and phase boundary segregation in WC–Co with TiC, ZrC, NbC or TaC additions
Source abstract
Abstract
Abstract The microstructure of interfaces in WC–Co based cemented carbides with TiC, ZrC, NbC or TaC additions was analysed using energy dispersive X-ray analysis in a transmission electron microscope and using atom probe tomography. Segregation to WC/WC grain boundaries and WC/(M,W)C phase boundaries corresponding to between 0.4 and 1.2 atomic layers of close packed monolayers of Co was observed in all the materials. In addition to Co, Ti, Zr and Nb, but not Ta, segregate to the WC/WC grain boundaries. Segregation was also observed for B, P, Fe and Cr, but not Ni, to the boundaries. These are impurities that originate from the material production. Segregation of Ti, Zr, Nb and Ta to WC/binder phase boundaries was observed. If formation of a MC phase at the interface is assumed, the segregation corresponded to a thickness less than a monolayer.
Source: openaire · Quality: candidate unverified · Source record ↗
References (31)
Show source-provided references
1. Physical and chemical nature of cemented carbides
2. Mechanisms of plastic deformation of WC–Co and Ti(C, N)–WC–Co10.1016/j.ijrmhm.2005.04.009 ↗
3. Effects of cobalt intergranular segregation on interface energetics in WC–Co10.1016/j.actamat.2004.01.013 ↗
4. Strength and reinforcement of interfaces in cemented carbides10.1016/j.ijrmhm.2005.05.010 ↗
5. Effect of TaC on plastic deformation of WC–Co and Ti(C, N)–WC–Co10.1016/j.ijrmhm.2005.04.010 ↗
6. Sintering behavior of VC-doped micro-grained cemented carbide
7. Grain and phase boundary segregation in WC–Co with small V, Cr or Mn additions10.1016/j.actamat.2010.03.038 ↗
8. Quantitative microanalysis of carbide/carbide interfaces in WC–Co-base cemented carbides10.1179/mst.1986.2.8.847 ↗
9. Computational study on grain growth in cemented carbides10.1016/S0263-4368(01)00068-3 ↗
10. Roebuck · 1999
11. Effects of addition carbides on the grain size of WC–Co alloy10.2497/jjspm.19.67 ↗
12. Morphology of vanadium carbide in submicron hardmetals
13. Segregation of vanadium at the WC/Co interface in VC-doped WC–Co10.1557/JMR.1998.0341 ↗
14. High resolution transmission electron microscopy study in VC-doped WC–Co compound10.1016/S1468-6996(00)00006-1 ↗
15. Location of VC in VC, Cr3C2 codoped WC–Co cermets by HREM and EELS10.1016/S0263-4368(01)00071-3 ↗
16. Structure and role of the interfacial layers in VC-rich WC–Co cermets10.1080/1478643031000075759 ↗
17. Effect of sintering cooling rate on V segregation amount at WC/Co interface in VC-doped WC–Co fine-grained hardmetal10.2497/jjspm.51.576 ↗
18. High resolution microscopy study in Cr3C2-doped WC–Co10.1023/A:1017953701641 ↗
19. Cr-rich layer at the WC/Co interface in Cr-doped WC–Co cermets: segregation or metastable carbide?10.1016/j.jcrysgro.2004.05.101 ↗
20. Effect of V, Cr and Mn additions on the microstructure of WC–Co10.1016/j.ijrmhm.2009.02.002 ↗
21. HRTEM study for cemented carbides doped with transition metal carbides of VC, NbC and ZrC
22. Analysis of interfaces in WC–Co with cubic carbide additions
23. Thermo-Calc and DICTRA, computational tools for materials science
24. Thermo-Calc Software AB
25. Characterisation of WC–Co with cubic carbide additions10.1016/j.ijrmhm.2008.11.007 ↗
26. A method for sharpening FIM-specimens
27. On the charge state of tungsten ions in the pulsed-field atom probe10.1016/0039-6028(84)90508-9 ↗
28. Weidow J, Johansson S, Andrén H-O, Wahnström G. Transition metal solubilities in WC in cemented carbides. Submitted for publication.
29. Gale · 2004
30. Bhadeshia · 2006
31. The enhanced concentration of Ni at structural dislocations in a grain boundary in W