Reaction dynamics in the combustion synthesis system of Al-CrO₃-Al₂O₃-NaF-N₂-O₂

Dazheng Yang1,2), Yue Zhang2), Degang Li 1), Dianwei Qi1), Wei Deng1), and Dayong Xun1) 1) Angang Steel Company Limited, Anshan 114001, China 2) State Key Lab for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

摘 要：A new material with heat-resistant and adiabatic characteristics and high strength was prepared using the combustion syn- thesis method by mixed powders of CrO3, Al, Al2O3, and NaF in atmospheric gas. The reaction dynamic process of the Al-CrO3-NaF-Al2O3-N2-O2 new material system by the combustion synthesis method was discussed based on the observation results by SEM, EDS, and XRD in combination with the combustion front quenching method （CFQM） and the relation curves between re- action free enthalpies and the corresponding temperatures. The combustion synthesis mechanism and the formation reasons of the phase in the combustion product were analyzed.

关键词：