Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 493, Issue 1-2, Pages 666-671Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2009.12.184
Keywords
Nano-carbide; Ball-milling; Rietveld method; HRTEM
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Funding
- University Grants Commission (UGC), India
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Synthesis of ternary Ti0.9Ni0.1C carbide by high energy ball-milling of the stoichiometric elemental powder mixture under argon atmosphere is investigated in detail. Microstructure characterization of ball-milled samples in terms of lattice imperfections and quantitative estimation of different phases present in the samples have been made by analyzing the X-ray diffraction data employing Rietveld's powder structure refinement method. The results reveal that the formation of Ti0.9Ni0.1C nano-carbide starts after 55 min of ball-milling from Ti-Ni-C solid solution. After 8 h of milling full formation of Ti0.9Ni0.1C is achieved without any contaminated phase. To study the effect of milling time on particle size, ball-milling is continued up to 12 h and the results indicate that particle size reaches its lowest value after 8 h of milling and then starts to agglomerate. Direct observation of microstructure of 12 h ball-milled sample under high resolution TEM reveals supportive evidence of structural and microstructural evolution by indirect method using XRD data. (C) 2010 Elsevier B.V. All rights reserved.
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