J Mater Sci Technol ›› 2005, Vol. 21 ›› Issue (05): 701-704.

• Research Articles • Previous Articles     Next Articles

Effect of Auxiliary Gases on Combustion Synthesis of Si3N4

Weiping SHEN, Fei WANG, Zhuohui WU, Changchun GE   

  1. Lab of Special Ceramics and P/M, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2004-07-30 Revised:2004-10-26 Online:2005-09-28 Published:2009-10-10
  • Contact: Weiping SHEN

Abstract: This paper presents results of combustion synthesis (Self-Propagating High Temperature Synthesis, SHS) of Si3N4 under nitrogen with argon, hydrogen or ammonia. Higher percentages of α-Si3N4 content were obtained in large size cakes in SHS with hydrogen and ammonia than those with argon. Effect of the auxiliary gases for combustion synthesis of Si3N4 on α phase content, on phase transformation of α-Si3N4 to β-Si3N4 in SHS Si3N4 and on oxygen content in SHS Si3N4 were investigated.

Key words: Combustion synthesis, α-silicon nitride, Phase transformation, Auxiliary gases