Mechanosynthesis of nanocrystalline ZrB2-based powders by mechanically induced self-sustaining reaction method

作者：Jalaly M^*; Bafghi M Sh; Tamizifar M; Gotor F J

来源：Advances in Applied Ceramics, 2013, 112(7): 383-388.

DOI：10.1179/1743676113Y.0000000091

• Zirconium diboride
• Mechanosynthesis
• Reaction mechanism
• Ball milling

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.

• 出版日期2013-10