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无机材料学报

无机材料学报

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反应自生成AlN传质过程的研究

王群; 王文忠; 高钦+; 沈玉辉+; 陈建峰+   

  1. 东北大学材料与冶金学院; 沈阳110006;+ 大连理工大学材料系; 大连116023
  • 收稿日期:1995-10-24 修回日期:1995-11-27 出版日期:1997-02-20 网络出版日期:1997-02-20

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

PDF (PC)

826

被引次数

16

摘要：

根据反应自生成AIN的传质及生长特征，构造出传质模型，并建立了传质方程.分析表明：整个反应过程分AlN晶体生长并伴随Si元素富集及AlN、Sicry，晶体共生两个阶段进行;N原子的扩散传质速率是控制总反应速率的关键因素.

关键词: AlN, 反应自生成, 氮化, 传质生长

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