|
|||||
|
|
Microstructural evolution of nanostructured Ti0.9Al0.1N prepared by reactive ball-milling |
|
| Authors: | U.K. BhaskarS. Bid S.K. Pradhan |
| Affiliation: | a Dept. of Physics, Sreegopal Banerjee College, Bagati, Magra, Hooghly 712148, India b Academy of Technology, G. T. Road, Aedconagar, Hooghly 712121, India c Dept. of Physics, The University of Burdwan, Golapbag, Burdwan 713104, India |
| Abstract: | Nanocrystalline stoichiometric Ti0.9Al0.1N powder has been prepared by ball-milling the α-Ti (hcp) and aluminum (fcc) powders under N2 at room temperature. Initially, α-Ti phase partially transformed to the transient cubic β-Ti phase and Ti0.9Al0.1N (fcc) phase is noticed to form after 3 h of milling. Nanocrystalline stoichiometric Ti0.9Al0.1N phase is formed after 7 h of milling. After 1 h of milling, all Al atoms are diffused into the α-Ti matrix. The transient β-Ti phase is noticed to form after 1 h of milling and disappears completely after 7 h of milling. Microstructure characterization of unmilled and ball-milled powders by analyzing XRD patterns employing the Rietveld structure refinement reveals the inclusion of Al and nitrogen atoms into the Ti lattice on the way to formation of Ti0.9Al0.1N phase. Microstructure of ball-milled samples is also characterized by HRTEM. The particle size of Ti0.9Al0.1N phase, as obtained from XRD method, is ∼5 nm which is very close to that obtained from HRTEM. |
| Keywords: | Mechanical alloying Rietveld HRTEM Nanocrystalline Ti0.9Al0.1N Microstructure |
| 本文献已被 ScienceDirect 等数据库收录！ | |