Journal of Inorganic Materials

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Mass Transfer Model and Crystal Growth Equation for Nitridation Reactions of Al-Si-Mg Alloys

WANG Qun; WANG Wenzhong; GAO Qin+; SHEN Yuhui+; CHEN Jianfeng+   

  1. School of Materials Metallurpy; Northeastern University Shenyang 110006 China; +DePartment of Matcrials Science and Engincering; Dalian University of Science and Technology Dalian 116023 China
  • Received:1995-10-24 Revised:1995-11-27 Published:1997-02-20 Online:1997-02-20

Abstract:

Mass transfer model and equation were established according to the characteristics of nitridation reactions of molten Al-Si-Mg alloys. It shows that nitridation rocess is divided into two stages: stage Ⅰ-AlN crystal growth with Si-enrichment; stage Ⅱ- co-growth of binary crystal AlN and Sicry. The rate of N atom diffusion is the key factor of controlling whole nitridation rate.

Key words: AlN, nitridation reaction, mass transfer, growth