凝縮プラズマ系下の金属-超軽元素化合物生成機構の基礎的解明

凝聚等离子体体系中金属-超轻元素化合物形成机制的基本阐明

• 批准号: 12450293
• 负责人: TOMII Yoichi
• 金额: $ 0.96万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450293/
• 关键词: condensed plasma reaction; non-equilibrium material; Al-Ti-C complex carbide; molten metal-CH_4reaction; thick film; ultra small size of particle; Thermal stability; environmental stability; 凝縮プラズマ; ラディカル種ないしはイオン種; プラズマ; 窒化物; 水素; 傾斜組成; TiN /

Two small experimental research projects based on previous results in last year were conducted progressively. Obtained main results are as follows.1. High performance and micro characterization of newly synthesized thick film formed by condensed plasma reaction. Though the compounds such as AlTi and AI_3Ti are easy formed at high temperature in Al-Ti system, it is difficult to disperse small size of these compound particle into matrix for strengthening the materials due to easy growth of these compounds crystal. Formation and dispersion of complex carbide compounds in Al-Ti-C system has tried by means of condensed plasma reaction with CH_4 gas at high temperature up to 1400℃. Thick (^omm) and high performance (mHv^o500) film was formed after the plasma reaction. By using XRD and EPMA analysis,the origin of this high performance has attributed to a new formation of complex carbide compounds including TiC with ultra small size of particle.2. Thermodynamic and environmental stability of newly synthesized thick film in non-equilibrium plasma reaction. Thermal and environmental stability of this newly synthesized thick film has examined. By including of Ti atom into Al-C compound under plasma reaction with CH_4 gas, both stability have improved much more than those without Ti. These progress in both stability were also thought to be attributed to a new formation of complex compounds including TiC with ultra small size of particle.The future trends for applying this newly synthesized thick film to industrial use have pointed out follows. (1) Determination of crystal structure for this firm should be conducted by transmission electron microscope (2) Establishment of completely uniform dispersion method of this high performance materials into aluminum matrix with ultra small size of particle.On this two residual points, theoretical and experimental approach will be continued.

去年在前期成果的基础上陆续开展了两个小型实验研究项目，取得的主要成果如下： 1．AlTi、AI_3Ti等化合物新合成厚膜的高性能及微观表征。 Al-Ti系中容易在高温下形成，但由于这些化合物晶体在Al-Ti-C中容易形成和分散，因此很难将小尺寸的这些化合物颗粒分散到基体中以强化材料。系统尝试通过与CH_4气体在1400℃高温下进行凝聚等离子体反应，等离子体反应后形成厚(^omm)且高性能(mHv^o500)的薄膜。这种高性能归因于新形成的复杂碳化物化合物，包括超小尺寸的TiC。2．新合成的厚膜在非平衡等离子体反应中的热力学和环境稳定性。通过在与 CH_4 气体的等离子体反应下将 Ti 原子引入到 Al-C 化合物中，研究了这种新合成的厚膜的热稳定性和环境稳定性，这两种稳定性都比没有 Ti 的情况有了很大的提高。这归因于一种新的复杂化合物的形成，包括具有超小尺寸颗粒的TiC。这种新合成的厚膜在工业应用中的未来趋势指出了以下几点：（1）该公司的晶体结构测定应通过以下方式进行。透射电子显微镜 (2)建立这种高性能材料在超小粒径铝基体中的完全均匀分散方法。针对这两点，将继续理论和实验方法。