中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 10 No. 3 June 2000 |
nonequilibrium diffusion①
（1. Department of Mechanical Engineering, Tsinghua Universigy, Beijing100084, P.R.China;
2. Department of Metal Forming, University of Science and Technology Beijing,
Beijing100083, P.R.China;
3. Metal Forming Department, Northeastern University, Shenyang110006, P.R.China;
4. Anshan Automobile Fittings Factory, Anshan 114014, P.R.China）
Abstract:The nonequilibrium diffusion of liquid aluminum atoms in cross direction in the innerpart of the solid steel base has been realized by using methods such as roughening steel plate surface, immersing flux on steel plate surface and shorttime diffusion, and the interface of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction was formed by using rapid solidification. The interfacial structure was studied by means of electron probe microanalysis. The results showed that the interfacial structure of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction is quite different from that of solid steel and liquid aluminum under conventional diffusion, that is, the interface of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction is made up of groups of Al13Fe4teeth(which grew from the contact surface to steel base inner) at the bulges of steel plate surface and Fe-Al solid solution (whose Al content is less than 3.5%) at the concaves of steel plate surface between the groups of Al13Fe4teeth.
Key words: nonequilibrium diffusion; cross direction; rapid solidification; interfacial structure
