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One step ultrafast mechanosynthesis of nanocrystalline cubic Ti0.9Al0.1B and its microstructure evolution |
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| Institution: | 1. Materials Science Division, Department of Physics, The University of Burdwan, Golapbag, Burdwan 713104, India;2. Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India;1. Department of Nanomaterial Engineering, Tarbiat Modares University, Tehran, Iran;2. Department of Electrical Engineering, Tarbiat Modares University, Tehran, Iran;1. Saudi Center for Theoretical Physics, Dhahran, Saudi Arabia;2. Theoretical Physics Group, Faculty of Sciences, Chouaib Doukkali University, PO Box 20, 24000 El Jadida, Morocco;3. Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, Guangzhou 510275, China;1. Faculty of Exact and Natural Sciences, Tbilisi State University, Tbilisi, 0179, Georgia;2. Physics Department, New York City College of Technology, The City University of New York, Brooklyn, NY 11201, USA;3. Graduate School and University Center, The City University of New York, New York, NY 10016, USA;1. Department of Aerospace Engineering, Space Research Institute, MUT, Tehran, Iran;2. Department of Mechanical Engineering, Shahid Chamran University, Ahvaz, Iran |
| Abstract: | Nanocrystalline single phase cubic Ti0.9Al0.1B has been prepared at room temperature in a minimum duration of 4 h by mechanical alloying the stoichiometric mixture of Ti, Al and B powders in a high energy planetary ball mill under argon atmosphere. The Rietveld's structure refinement of X-ray diffraction data reveals that cubic Ti–Al–B phase is initiated just after 1 h of milling and at the same time α-Ti (hcp) phase partially transforms to metastable β-Ti (bcc) phase. In the course of milling, ordered Ti–Al–B lattice gradually transforms to a distorted state and the degree of distortion increases with milling time up to 15 h. The formation of cubic Ti0.9Al0.1B is also confirmed from the selected area electron diffraction (SAED) pattern. Microstructure characterization by high resolution transmission electron microscopy (HRTEM) reveals that Ti–Al–B nanoparticles are isotropic in nature with average particle size ~4.5 nm and is in good agreement with the value obtained from the Rietveld analysis of X-ray diffraction data. |
| Keywords: | X-ray diffraction (XRD) Mechanical alloying Microstructure Electron microscopy Rietveld analysis |
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