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. 2019 Aug 23;5(8):eaaw2398. doi: 10.1126/sciadv.aaw2398

Fig. 4. Thermal stability of ultrafine/nanocrystalline Cu-containing WC nanoparticles.

Fig. 4

(A to D) STEM images of an area with a high percentage of WC nanoparticles at room temperature, 400°C, 600°C, and 850°C, respectively. (E to H) STEM image of an area with a relatively low percentage of WC nanoparticles at room temperature, 400°C, 600°C, and 850°C, respectively. (I) SEM image of Cu-34vol%WC after heat treatment (750°C for 2 hours). (J) EBSD image corresponds to the marked white rectangle in (I). (K) Cu grain size distribution of the heat-treated Cu-34vol%WC sample.