Journal
ADVANCES IN APPLIED CERAMICS
Volume 112, Issue 7, Pages 383-388Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/1743676113Y.0000000091
Keywords
Zirconium diboride; Mechanosynthesis; Reaction mechanism; Ball milling
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Funding
- Spanish government [MAT2011-22981]
- European Regional Development Fund
- Ministry of Science, Research and Technology of Iran
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Preparation of nanocrystalline ZrB2-based powder by aluminothermic and magnesiothermic reductions in M/ZrO2/B2O3 (M=Al or Mg) systems was investigated. In this research, high energy ball milling was employed to persuade necessary conditions for the occurrence of a mechanically induced self-sustaining reaction (MSR). The course of MSR reactions were recorded by a noticeable pressure rise in the system during milling. Ignition times for ZrB2 formation by aluminothermic and magnesiothermic reductions were found to be 13 and 6 min, respectively. Zirconium diboride formation mechanism in both systems was explained through the analysis of the relevant sub-reactions.
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