TEM images (a, c) with SAED patterns (b, d) of the worn TiAlCrSiYN/TiAlCrN coating (see figure 3): (a, b) 45 nm from the surface, no evidence of h-AlN; (c, d) 85 nm from the surface, small amount of the h-AlN phase. (Reproduced with permission from [240], AIP.)