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. 2023 Jul 7;9(7):e17923. doi: 10.1016/j.heliyon.2023.e17923

Fig. 13.

Fig. 13

a. Micrograph of medium carbon steel carburised with palm kernel shell at 1000 °C for 3 h. b. Energy Dispersive Spectroscopy of the elements c. 3D image of the scanning electron microstructural feature of the steel sample.