S0403-1-3 中空金属球の通電加熱による成形体固化技術の基礎検討(新機能多孔質材料の創製と評価)

概要

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Metallic hollow spheres (MHS) structure is one of the ultra light porous metals which can reduce car weight and has high rigidity and good energy absorption for collision safety. The conventional fabrication method of a MHS structure is powder metallurgy and the spheres are simultaneously joined during sintering of green balls. However, this method has some problems on the process cost and insertion of the structure into tubular parts. Thus, it is expected that a technology to consolidate in tubular parts MHspheres becomes important. We have already developed the inexpensive spheres by metal working of sheet forming or tube forming and then a consolidation method of the hollow spheres by electric heating is examined now. Because of thin and small spheres, it is not easy to join them. In this research, it is tried to join one string of the hollow spheres and the effect of some electric conditions and pressure between the spheres on the joint strength is experimentally examined.
2009-09-12