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Mechanochemical synthesis of ZrB2–SiC–ZrC nanocomposite powder by metallothermic reduction of zircon
Ist Teil von
Journal of alloys and compounds, 2013-12, Vol.581, p.782-787
Ort / Verlag
Kidlington: Elsevier B.V
Erscheinungsjahr
2013
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
•Synthesis of the ZrB2-based composite by metallothermic reduction reactions.•Mechanically induced self sustaining reactions by high energy ball milling.•Using zircon (ZrSiO4) for initial material as a joint source of Zr and Si.•Investigation of the formation mechanism of the products by studying sub-reactions.
Aluminium and magnesium were used in the M/ZrSiO4/B2O3/C (M=Al, Mg) system to induce a mechanically induced self-sustaining reaction (MSR). Aluminium was not able to reduce the system to the desired products, and the system became amorphous after 10h milling. However, nanocomposite powder of ZrB2–SiC–ZrC was in situ synthesized by the magnesiothermic reduction with an ignition time of approximately 6min. The mechanism for the formation of the product in this system was determined by studying the relevant sub-reactions.