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Microstructure of the outer area of the graphite/PEEK 708 coating heated at 390 °C and cooled with a furnace on a cross section. The graphite particle is located in the area directly close to the coating surface (a) and in the area about 3 µm away from the coating surface (b). Magnified details of the particle present in Figure 8a showing a layered structure are given at the top. TEM, focused ion beam (FIB) lamellae.
