The samples were undergone to thermal and pressure influence in the region of pressures of 6,0 – 8,0 GPa and temperatures 1670 – 1870 K during 120 sek. Order of influence: establishment of pressure – heating – exposure – cooling – taking down of pressure.

The alloys Fe₃AlC (85,5 wt.% Fe, 12wt.%Al, 2,5 wt.%C) and (Fe₃Al)₄₀C₆₀ (90,3 wt.% Fe, 5,81 wt.%Al, 3,88 wt.%C) were studied in the experiment.

In the alloy Fe₃AlC using SEM method it was observed some quantity of diamond microcrystal groups (20-100 mm) in K-phase matrix.

In the (Fe₃Al)₄₀C₆₀ alloy after thermal and pressure influence it was observed the volumes which were filled up on 30% by diamond crystals of 50-200 mm. At that at the less thermal and pressure parameters (6 GPa and 1670K) the synthetic diamond micro crystals with developed surface forms, but at more high (8GPa and 1879 K) – diamonds like perfect octahedral micro crystals forms.

Spectral investigations in Fe- and Al-irradiation have shown the presence of 3:1 atoms of Fe and Al in diamond micro crystals.

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1. Electronic structure of diamond-formating Me-Al-C alloys
2. X-ray investigations of the powders of highcarbon Fe-Al alloys phase components
3. Architecture and Electronic Structure of K-Phase in Fe-Al-C Alloys