“…In nonoxide high-temperature superhard ceramic coatings, nitrogen self-diffusion was measured in amorphous Si 3 N 4 , and in silicon carbo-nitrides. , For crystalline metal oxides, lithium self-diffusion was examined in LiNbO 3 . , Self-diffusion was measured in metals such as in nanocrystalline copper, iron, , and Fe-based compounds . In semiconductors, self-diffusion was measured in crystalline silicon , and germanium and in amorphous silicon and germanium . Extrinsic diffusion (so-called “Fremddiffusion”) was also suitably measured with NR − for lithium permeation through amorphous silicon, − amorphous lithium silicide, and nanocrystalline chromium thin layers.…”