Abstract
Previous studies have shown that carbon diffusion can play a key role in the formation of the Co gradient in functionally graded (FG) WC–Co. Analysis of the carbon composition in the Co binder phase of WC–Co alloys is challenging, however, not only due to the small volume of the Co phase in these materials, but also because of the difficulty in characterizing light elements like carbon within matrices of higher atomic weight. In this study, a method via field emission electron probe microanalysis (FE-EPMA) capable of very fine beam size was developed to measure the carbon composition in the Co phase of graded WC–Co materials. A plateau of 0.8wt.% carbon was measured for approximately 130μm from the surface into the sample, followed by a steep drop to 0.55wt.% and a more gradual decline of carbon into the interior that was accompanied by a corresponding increase in the W gradient within Co pockets of the microstructure. These results are discussed in relation to theory and prior simulations.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Refractory Metals and Hard Materials
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
