Mechanism and kinetics analysis of AlN combustion synthesis

摘要

Mechanism of AlN combustion synthesis was Studied by DSC analysis and quenching" experiment of combustion wave. In preheating region, Al powder melted at 660 deg C and became spherical because of surface tension. In reaction region, Al volatilized rapidly at 1000 deg C and Al vapor reacted with N_2 to form AlN, which nucleated and grew on the surface of AlN formed precedently as a diluent. Based on the experiment analysis, kinetics equations and modeling were established. Analysis showed the dramatic effect of temperature, aluminum particle size and nitrogen pressure on the reaction speed.