GAS-PHASE INFILTRATION MASS TRANSPORT PHENOMENA IN EXOTHERMIC PROCESSES OF MATERIALS SYNTHESIS

摘要

Some chemical reactions in the "solid porous reagent-gaseous reagent-solid product" system that find important practical applications are considered. The infiltration-assisted mass transfer of nitrogen gas in combustion synthesis of nitrides is analyzed. Presented are the most interesting data of experimental and modeling studies. The limiting combustion modes (autowave, bulk, infiltration-controlled, etc.) are discussed. Some important characteristics of the process (stability limits, burning velocity, combustion temperature, gas pressure in pores, etc.) are presented.