| Al-Ti-CaC2体系自蔓延反应及其热力学分析 |
| |
| 引用本文： | 刘英,张兆东,李卫.Al-Ti-CaC2体系自蔓延反应及其热力学分析[J].特种铸造及有色合金,2011,31(5). |
| |
| 作者姓名： | 刘英 张兆东 李卫 |
| |
| 作者单位： | 暨南大学材料科学与工程系 |
| |
| 基金项目： | 广东省科技计划资助项目 |
| |
| 摘 要： | 对Al-Ti-CaC<,2>体系自蔓延反应过程中有关反应的Gibbs自由能ΔG及最高热力学温度进行了一系列计算,并对Al(50%,质量分数,下同)、Ti(30%)、CaC<,2>(20%)混合粉末进行了压制,并将压制试样在氩气保护下进行了加热烧结试验.结果表明,Tic、CaAl<,2>、TiAl<,2>、Al<,4>G<,3>具有较好的热力学稳定性,在1 200 K以上时,由TiAl<,3>、Al<,4>C<,3>反应,合成TiC;Al-Ti-CaC<,2>体系的最高热力学温度随预热温度提高而增加;在体系中Al含量为50%、预热温度为1 000 K条件下,计算的最高热力学温度大于2 400 K,自蔓延反应易于发生;试验时压制试样加热到963 K时发生剧烈反应.X射线衍射分析表明反应产物中含有TiC、CaAl<,2>、TiAl<,3>,TiAl<,3>为不完全反应产物.试验与热力学分析结果基本符合.
|
| 关 键 词： | 热力学分析 自蔓延高温合成 |
Self-propagating High Temperature Synthesis and Thermodynamic Analysis of Al-Ti-CaC2 System |
| |
| Liu Ying,Zhang Zhaodong,Li Wei.Self-propagating High Temperature Synthesis and Thermodynamic Analysis of Al-Ti-CaC2 System[J].Special Casting & Nonferrous Alloys,2011,31(5). |
| |
| Authors: | Liu Ying Zhang Zhaodong Li Wei |
| |
| Affiliation: | Liu Ying,Zhang Zhaodong,Li Wei(Department of Materials Science and Engineering,Jinan University,Guangzhou,China) |
| |
| Abstract: | A series of calculations were performed to the self-propagating reaction process of Al-Ti-CaC2 system about the Gibbs free energy change and adiabatic temperature,and the mixed powder of Al,Ti and CaC2 was pressed and the pressed samples were heated and sintered under the protection of argon atmosphere.The results show that TiC,TiAl3,CaAl2 and Al4C3 phases exhibit desirable thermodynamical stability,and TiC can be generated by the reaction of TiAl3 and Al4C3 under high temperature above 1200 K.The adiabatic... |
| |
| Keywords: | Al-Ti-CaC2 |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
