Abstract
The purpose of this reseach is to propose a new recycle system of an iron, which is simpler, lower cost and lower energy consumption than the current recycle system. The concept of this system is called "active disassembly" a material includes an actuator which operates under special surroundings. Since large equipment and re-smelting will not be needed, it will be easy to recycle an iron and steel. In this research, Terbium was used as an actuator because rare earth metals have a nature of absorbing hydrogen gas and the volume change during absorbing hydrogen gas. The iron base new material was formed, which includes Th actuator network spread into Fe particle boundary during the sintering process. The Th acutuator was triggered under hydrogen atomosphere and pulverized itself. The material showing the most suitable Tb network was Fe-2at%Tb sintered at 1673K for 600s and became embrittle after heat treatment under hydrogen atomosphere. The recycled materials can be obtain by sintering the pulverized material again at 1673K for 600s. KEY WORDS active disassembly, hydrogen, embrittlement
