Journal
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
Volume 101, Issue 4, Pages 1412-1419Publisher
WILEY
DOI: 10.1111/jace.15297
Keywords
combustion; Hafnium diboride (HfB2); Mechanosynthesis; Nanoparticles
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Funding
- Iran University of Science and Technology
- Spanish government [MAT2014-52407-R]
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A mechanically induced self-sustaining reaction (MSR) was used to synthesize hafnium diboride nanoparticles. Along this route, magnesium was selected as a robust reducing agent for co-reduction in boron and hafnium oxides in a combustive manner. Combustion occurred after a short milling period of 12 minutes. The hafnium diboride nanoparticles had a polygonal faceted morphology and were 50-250 nm in diameter. The assessment of the processing mechanism revealed that the initial combustive reduction in B2O3 to elemental B by Mg was the major step for progressing the overall reaction. After that, HfO2 can be reduced to elemental Hf, followed by the synthesis of HfB2 phase.
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