Abstract:
The structural and phase analysis of as-mechanosynthesized and subsequently annealed (Fe$_{1-x-y}$Cr$_x$Si$_y$)$_{75}$C$_{25}$ alloys, where $x$ = 0.05; 0.10, $y$ = 0.01; 0.03, was performed using X-ray diffraction, differential scanning calorimetry and magnetic measurements. During mechanosynthesis, a large amount of X-ray amorphous phase is formed, which crystallizes in two stages during annealing. One of the components of crystallization is cementite. After the first stage of crystallization (annealing temperature up to 500$^\circ$C), the concentration of chromium in cementite is practically independent of the silicon content, and is determined only by the chromium content in the alloys. As a result of the second crystallization stage of the residual X-ray amorphous phase and annealing at 800$^\circ$C, a quite homogeneous alloyed cementite is formed, the chromium concentration in which is determined by both Cr and Si content in the alloys.
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