Paper Title
Study on the Formation Mechanism of Nanostructured Chromium Carbide During Mechanical Alloying
Abstract
In the present study nanostructured chromium carbide was fabricated by mechanical alloying of pure Cr and
graphite powders. Phase transformations and microstructural changes during mechanical alloying was evaluated using XRay
Diffraction (XRD) and Scanning Electron Microscopy (SEM). The results showed that the formation of Cr7C3 started
after 8h of milling time in a gradual mode and finished after 40h of mechanical alloying. The crystallite size of synthesized
Cr7C3 was found as 20 nm. Grain refinement to nanometric scale and the formation of lamellar structure between chromium
and graphite was found as the main reason for the synthesis of Chromium carbide at room temperature. Nanostructured
chromium carbide was stable during heating at 900 0C for 1h.
Keywords: Mechanical alloying, Chromium carbide, Thermodynamic analysis, nanostructured