Synthesis of nanocrystalline titanium carbide alloy powders by mechanical solid state reaction
- Al-Azhar Univ., Cairo (Egypt)
A high-energy ball mill operated at room temperature has been used for preparing titanium carbide (TiC) alloy powders, starting from elemental titanium (Ti) and carbon (C) powders. X-ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) have been used to follow the progress of the mechanical solid state reaction of Ti and C powders. A complete single phase of fcc-Ti{sub 44}C{sub 56} alloy powders is obtained after a very short milling time (20 ks). The lattice parameter (a{sub 0}) of the end product of Ti{sub 44}C{sub 56} was calculated to be 0.4326 nm. The presence of excess starting reactant materials (Ti and/or C atoms) in the final product of the alloy powders could not be detected. The end product of Ti{sub 44}C{sub 56} alloy powders possesses homogeneous, smooth spherical shapes with a average particle diameter of less than 0.5 {micro}m. The internal structure of the particles is marked by fine cell-like features of about 3 nm. On the basis of the results of the present study, the mechanical alloying (MA) process appears to provide a powerful tool for the fabrication of Ti{sub 44}C{sub 56} alloy powders at room temperature. The mechanism of mechanical solid state reaction for formation of Ti{sub 44}C{sub 56} alloy powders is discussed.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 367300
- Journal Information:
- Metallurgical Transactions, A, Journal Name: Metallurgical Transactions, A Journal Issue: 8 Vol. 27; ISSN 0360-2133; ISSN MTTABN
- Country of Publication:
- United States
- Language:
- English
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