| Title |
Swelling Behaviour of Cu - coated Fe Powder Compacts in Fe - Cu System |
| Authors |
양현삼(Hyun Sam Yang); 이경구(Kyung Ku Lee); 문길원(Kil Won Moon); 이도재(Doh Jae Lee) |
| Abstract |
The swelling and alloying behaviour of ferrous metal powder compacts have been studied using TMA(thermomechanical analysis) and optical microscope. Binary Fe-Cu compacts containing 3wt% Cu and up to 7wt% Cu were prepared from blends of Fe and Cu powders, and Cu coated Fe powders respectively. The TMA observations indicated that penetration of Cu-liquid phase into Fe particle and grain boundary leads to swelling of the powder compacts during heating and early stage of isothermal sintering at 1150˚C. Those swelling can be suppressed by using Cu coated Fe powder. The alloying process was accompanied by grain boundary penetration of Cu-rich liquid phase. |