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Abstract
In the present work, synthesis and microstructure characterization of nanocrystalline intermetallic carbide (Ni-Ti)3C synthesized by mechanical alloying under argon atmosphere has been investigated in detail. Microstructure characterization in terms of lattice imperfections of prepared ball-milled powders and quantitative estimation of different phases present in the powder samples have been carried out by analyzing X-ray diffraction data employing Rietveld's powder structure refinement method. Rietveld's analysis output reveals that the single phase stoichiometric nanocrystalline (Ni-Ti)3C has been formed after 7 h of ball-milling from Ni–Ti–C solid solution phase and extended milling up to 10 h confirms the phase stability of newly formed carbide phase. High resolution TEM images of 10 h ball-milled sample reveal the microstructure of prepared nano-carbide which is in good agreement as obtained from structural and microstructural evaluation by Rietveld method using XRD data. Finally, a comparative study between microstructural parameters of (Ni-Ti)3C with Ni3C helps to understand the effect of Ti doping on the phase formation of (Ni-Ti)3C.
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