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Title: Synthesis and characterization of nano-structured TiB{sub 2} processed by milling assisted SHS route

Abstract

TiB{sub 2} was synthesized via milling assisted self-propagating high-temperature synthesis (SHS) route using TiO{sub 2}, H{sub 3}BO{sub 3} and Mg powders as starting materials. The milling products were compacted and subjected to a hot filament on their top to initiate SHS. Effects of the milling time and addition of NaCl as a process diluent on the phase composition and morphology of the products were investigated. X-ray diffraction analysis indicated the formation of nano-crystalline TiB{sub 2} with mean crystallite size of 31 nm after acid leaching process at room temperature. Addition of 2 mol of NaCl in the same sample decreases the mean crystallite size to 27 nm. SEM and TEM micrographs showed that the mean particle size of TiB{sub 2} decreased from 200 nm in the un-milled sample to about 50 nm in the 5-hour mechanically activated (MA) sample. - Graphical abstract: High purity nano particles of TiB{sub 2} were achieved after complete elimination of undesirable phases by acid leaching of MA-SHS product at ambient temperature. Highlights: Black-Right-Pointing-Pointer Nano-structured pure TiB{sub 2} was synthesized by MA-SHS route. Black-Right-Pointing-Pointer The mean particle size of TiB{sub 2} phase was 50 nm. Black-Right-Pointing-Pointer Impurities were eliminated by leaching of the products at ambientmore » temperature.« less

Authors:
; ;
Publication Date:
OSTI Identifier:
22163148
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 73; Journal Issue: Complete; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AMBIENT TEMPERATURE; BORIC ACID; IMPURITIES; LEACHING; MILLING; NANOSTRUCTURES; PARTICLE SIZE; PARTICLES; POWDERS; SCANNING ELECTRON MICROSCOPY; SODIUM CHLORIDES; SYNTHESIS; TITANIUM BORIDES; TITANIUM OXIDES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Nozari, A., Ataie, A., E-mail: aataie@ut.ac.ir, and Heshmati-Manesh, S. Synthesis and characterization of nano-structured TiB{sub 2} processed by milling assisted SHS route. United States: N. p., 2012. Web. doi:10.1016/J.MATCHAR.2012.08.003.
Nozari, A., Ataie, A., E-mail: aataie@ut.ac.ir, & Heshmati-Manesh, S. Synthesis and characterization of nano-structured TiB{sub 2} processed by milling assisted SHS route. United States. doi:10.1016/J.MATCHAR.2012.08.003.
Nozari, A., Ataie, A., E-mail: aataie@ut.ac.ir, and Heshmati-Manesh, S. Thu . "Synthesis and characterization of nano-structured TiB{sub 2} processed by milling assisted SHS route". United States. doi:10.1016/J.MATCHAR.2012.08.003.
@article{osti_22163148,
title = {Synthesis and characterization of nano-structured TiB{sub 2} processed by milling assisted SHS route},
author = {Nozari, A. and Ataie, A., E-mail: aataie@ut.ac.ir and Heshmati-Manesh, S.},
abstractNote = {TiB{sub 2} was synthesized via milling assisted self-propagating high-temperature synthesis (SHS) route using TiO{sub 2}, H{sub 3}BO{sub 3} and Mg powders as starting materials. The milling products were compacted and subjected to a hot filament on their top to initiate SHS. Effects of the milling time and addition of NaCl as a process diluent on the phase composition and morphology of the products were investigated. X-ray diffraction analysis indicated the formation of nano-crystalline TiB{sub 2} with mean crystallite size of 31 nm after acid leaching process at room temperature. Addition of 2 mol of NaCl in the same sample decreases the mean crystallite size to 27 nm. SEM and TEM micrographs showed that the mean particle size of TiB{sub 2} decreased from 200 nm in the un-milled sample to about 50 nm in the 5-hour mechanically activated (MA) sample. - Graphical abstract: High purity nano particles of TiB{sub 2} were achieved after complete elimination of undesirable phases by acid leaching of MA-SHS product at ambient temperature. Highlights: Black-Right-Pointing-Pointer Nano-structured pure TiB{sub 2} was synthesized by MA-SHS route. Black-Right-Pointing-Pointer The mean particle size of TiB{sub 2} phase was 50 nm. Black-Right-Pointing-Pointer Impurities were eliminated by leaching of the products at ambient temperature.},
doi = {10.1016/J.MATCHAR.2012.08.003},
journal = {Materials Characterization},
issn = {1044-5803},
number = Complete,
volume = 73,
place = {United States},
year = {2012},
month = {11}
}