无机材料学报

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铝合金直接氨化生长氮化铝反应机制研究

金海波1; 陈克新1; 周和平1; 王群2; 王文忠2   

  1. 1. 清华大学新型陶瓷与精细工艺国家重点实验室, 北京 100084; 2. 东北大学材料与冶金学院, 沈阳 110006
  • 收稿日期:1999-08-18 修回日期:1999-09-20 出版日期:2000-08-20 网络出版日期:2000-08-20

Growth Mechanism of AlN Synthesized by Directed Nitridation of Molten Aluminium Alloys

JIN Hai-Bo1; CHEN Ke-Xin1; ZHOU He-Ping1; WANG Qun2; WANG Wen-Zhong 2   

  1. 1. Department of Materials Science and Engineering; Tsinghua University; Beijing 100084; China; 2. School of Materials and Metallurgy; Northeastern University; Shenyang 110006; China
  • Received:1999-08-18 Revised:1999-09-20 Published:2000-08-20 Online:2000-08-20

摘要: 针对铝合金直接氮化生长AIN过程中的晶体生长过程进行分析,通过X-ray衍射和SEM观察,获得了不同生长阶段AIN晶体的生长特征,研究了铝合金直接氨化生长氮化铝的反应机制.提出了一种气-液-固-固)晶体生长机制,简称VLSS机制,并着重对VLSS机制的实现条件、实现过程以及与传统的VLS晶体生长机制的相同点和差异进行了讨论.

关键词: 铝合金, 直接氮化, 氮化铝, 生长机制

Abstract: The growing process of AIN crystal in directed nitridation of molten aluminium alloys was investigated. The growing characters of AIN crystals were obtained through XRD and SEM. A new mechanism of vapour-liquid-solid-solid (VLSS) was proposed, and its similarity and difference from the traditional vapour-liquid-solid (VLS) mechanism were discussed. The emphasis was placed on the prerequisites and realization process of VLSS mechanism

Key words: aluminium alloys, directed nitridation, AlN, growth mechanism

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