An investigation on the formation mechanism of nano ZrB2 powder by a magnesiothermic reaction

JOURNAL OF ALLOYS AND COMPOUNDS

卷:588

Article

Jalaly, M.¹  Bafghi, M. Sh.¹  Tamizifar, M.¹  Gotor, F. J.² 

[1] Iran Univ Sci & Technol, Sch Met & Mat Engn, Tehran 1684613114, Iran

[2] Inst Ciencia Mat Sevilla CSIC US, Seville 41092, Spain

关键词: Zirconium diboride;    Mechanosynthesis;    Formation mechanism;   

DOI  :  10.1016/j.jallcom.2013.11.050

来源: Elsevier

【 摘 要 】

Nanocrystalline zirconium diboride (ZrB2) powder was produced by mechanochemistry from the magnesiothermic reduction in the Mg/ZrO2/B2O3 system. The use of high-energy milling conditions was essential to induce a mechanically induced self-sustaining reaction (MSR) and significantly reduce the milling time required for complete conversion. Under these conditions, it was found that the ignition time for ZrB2 formation was only about a few minutes. In this study, the mechanism for the formation of ZrB2 in this system was determined by studying the relevant sub-reactions, the effect of stoichiometry, and the thermal behavior of the system. (C) 2013 Elsevier B. V. All rights reserved.

【 授权许可】

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