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Identification of non‐agglomerated nanodiamonds inside metal matrix composites by synchrotron radiation

Identification of non‐agglomerated nanodiamonds in an aluminum matrix at a content of 3–10 vol% was performed on compacted specimens using KMC‐2 beamline at the BESSY II synchrotron. Composites were produced by a mechanical alloying process that allowed a uniform distribution of individual non‐agglomerated primary nanodiamond particles in the metal matrix, as verified by scanning electron microscopy investigation of the composite granule's surface. The study demonstrated for the first time that the application of synchrotron radiation could effectively identify nanodiamond particles in the matrix at a volume fraction as low as 3%. The obtained results are in complete agreement with the theoretical predictions.