APT analysis of WC-Co based cemented carbides |
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Authors: | Weidow Jonathan Andrén Hans-Olof |
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Affiliation: | Department of Applied Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden |
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Abstract: | A method for quickly producing sharp and site-specific atom probe specimens from WC-Co based cemented carbides was developed using a combination of electropolishing, controlled back-polishing and FIB milling. Also, a method for measuring the amount of segregated atoms to an interface between two phases with a big difference in field needed for field evaporation was developed. Using atom probe tomography, the interface chemistry of WC/WC grain boundaries, WC/(M,W)C phase boundaries and WC/binder phase boundaries was analysed. In addition, the transition metal solubility in WC was determined. |
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Keywords: | Segregation Grain growth inhibition TiC ZrC NbC TaC |
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