中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 13 No. 3 June 2003 |
（1. School of Materials Science and Engineering,
Central South University, Changsha 410083, China;
2. General Research Institute for Nonferrous Metals, Beijing 100088, China）
Abstract:Solidification curve of Al-8.5Fe-1.7Si was calculated by thermodynamic models. Phase constitutions of Al-8.5Fe, Al-8.5Fe-1.7Si and Al-8.5Fe-1.7Si-1.3V alloys were analysed at different cooling rates by means of optical microscopy, X-ray diffraction, transmission electron microscopy and so on. Microstructures of spraying deposited ingots and their hot-processed samples were detected, and the phase transitions during spraying deposition, heating process and hot-processing were also studied. The results show that, by spraying deposition, the ideal structures of α(Al) and Al12(Fe, V)3Si can be obtained when cooling rate is above 105K/s; and restraining the formation of Al8(Fe,V)2Si/Al13Fe4 can improve the properties of the alloy.
Key words: spraying deposition; heat-resistant Al alloy; phase constitute; phase transition
