Fig. 6: Microstructure of the cross-section of the WB4-βB worn surface.
From: Near-zero-wear with super-hard WB4 and a self-repairing tribo-chemical layer
a STEM image of FIB-cut foil of the cross-section of the WB4-βB worn surface. b Enlarged view of the marked quadrate area of the interface in (a) between the WB4 phase and tribo-layer interface. c Enlarged view of the quadrate marked interface area in (a) between the βB phase and tribo-layer interface. d High-resolution transmission electron microscopy (HRTEM) images and fast Fourier Transform (FFT) images of tribo-layer and intermediate layer in the worn surface. e EDS elemental mapping corresponding to the (b) region. f 1D compositional profile measured along the orange arrow in (b).
