| 학회 | 한국재료학회 |
| 학술대회 | 2010년 봄 (05/13 ~ 05/14, 삼척 팰리스 호텔) |
| 권호 | 16권 1호 |
| 발표분야 | E. Frontiers of Materials Research(선도 재료연구) |
| 제목 | Anistropic compressive properties of lotus-type porous NiAl fabricated by continuous zone melting technique |
| 초록 | Recently, many porous metals with long cylindrical pores(Lotus metal) have been fabricated and studied and its superior mechanical property compared to conventional porous metal was proved from previous investigations. In addition, NiAl is a potential high temperature structure material due to its high melting point, low density, high elastic modulus and excellent oxidation resistance. In this study, the porous NiAl with long cylindrical pores aligned in one direction was fabricated by continuous zone melting technique in pressurized hydrogen and argon gas. The porosity of the specimens varied in the range 37-41% and the mean pore size was obtained 421μm. Compression specimens(7.5 long×5×5mm) were cut from ingots by using wire electrical-discharge machine(EDM). Each specimens were homogenized under vacuum for 24hours at 1473K. Compression tests were carried out on specimens with cylindrical pores orientated parallel and perpendicular to the compressive direction at room temperature. The compressive yield strength of porous NiAl whose pore axis is parallel to the compressive direction was higher than perpendicular to the compressive direction. |
| 저자 | 이지운1, 현승균1, 김목순1, H.Nakajima2, T.Ide3 |
| 소속 | 1인하대, 2The Institute of Scientific and Industrial Research, 3Osaka Univ. |
| 키워드 | Porous metals; Compressive properties; NiAl; Hydrogen |
