The nanocrystalline Al-Si-Ni-Mm alloys have been intensively investigated in the recent years. Al – based alloys containing silicon (Si), rare earth metal (RE) and late transition metal (Ni), have high tensile strength and good wear resistance. Bulk nanostructured alloys were produced by ball milling of nanocrystalline ribbons followed by high pressure hot compaction.
Rapidly solidified ribbons were composed of a-Al crystals embeded in amorphous matrix.
The ribbons were produced by melt-spinning method in argon atmosphere.
Different temperatures in the range from room temperature to 350ºC and pressures of compaction up to 7.7 GPa were applied to improve the quality of compaction investigated alloys. X-ray diffraction, differential scanning calorimetry, transmission and scanning electron microscopy were used for characterisation of microstructure Al-Si-Ni-Mm alloys. The Vickers hardness was measured using a load of 1 kG.

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