Combustion of silicon powders containing organic additives in nitrogen gas under pressure: 1. Effect of dopants on combustion phenomenology

Microstructure and Thermo‐Kinetics Analysis in Combustion Synthesis of Si3N4 with High α‐Phase Content

“…Concerning the irreversible character of the α→β phase transformation and the “seeding effect” of Si 3 N 4 as a starting material, it seems quite intuitive that an effective diluting/nucleating agent should preferentially have a high α‐phase content. (ii) Add ammonium salts to the starting powder mixture, which undergo endothermic decomposition with the release of NH 3 . Moreover, the ammonia gas generation results in the fluffiness of the reacting mixture and enlarges the accessible surface of the silicon reagent by nitrogen, therefore promoting the completed nitridation.…”

Effect of Fe‐Contained Species on the Preparation of α‐Si3N4 Fibers in Combustion Synthesis

“…Unfortunately, a-phase Si 3 N 4 is difficult to be fabricated easily by the CS method because that the combustion temperature for keeping sustainable self-propagating reaction is generally hard to be finely controlled and usually higher than the a-b transformation temperature of Si 3 N 4 . [8][9][10][11][12][13][14][15] The extremely high temperature developed at the reaction front makes reactant silicon particles to melt and coalesce. Both processes easily tend to hinder the complete nitridation of silicon.…”