反应自生成AlN传质过程的研究

无机材料学报, 1997, 12(1): 100-104.

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

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>

School of Materials Metallurpy

Northeastern University Shenyang 110006 China

Dalian University of Science and Technology Dalian 116023 China>

关键词： AlN , nitridation reaction , mass transfer , growth

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

Keywords： AlN , 反应自生成 , 氮化 , 传质生长

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、Si_cry，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.

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 Si_cry. The rate of N atom diffusion is the key factor of controlling whole nitridation rate.

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