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In situ single‐step reduction and silicidation of MoO 3 to form MoSi 2
Author(s) -
Sharma Piyush,
Kaur Taranpreet,
Pandey Om Prakash
Publication year - 2019
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15994
Subject(s) - nanocrystalline material , crystallite , materials science , activation energy , molybdenum , autoclave , kinetics , phase (matter) , chemical engineering , selected area diffraction , crystallography , metallurgy , chemistry , nanotechnology , transmission electron microscopy , physics , organic chemistry , quantum mechanics , engineering
Nanocrystalline molybdenum disilicide (MoSi 2 ) is synthesized in a specially designed autoclave at 900°C. The XRD results revealed that the formation of MoSi 2 is favorable with the blend of MoO 3 , Si, and Mg powders. The HR ‐ TEM and SAED patterns confirm the formation of MoSi 2 phase. The structural parameters (crystallite size, strain, stress, and deformation energy density) are calculated using the Williamson‐Hall (W‐H) analysis. The formation mechanism involved in the synthesis of MoSi 2 is proposed. The nonisothermal oxidation kinetics (~1200°C) of MoSi 2 phase is examined through the thermal analysis techniques. The activation energy is determined by the Kissinger‐Akahira‐Sunsose isoconversional kinetic model. Finally, the reaction mechanism involved during the oxidation of MoSi 2 phase is identified using the integral master‐plots method.