| 학회 | 한국재료학회 |
| 학술대회 | 2005년 가을 (11/10 ~ 11/11, 한양대학교) |
| 권호 | 11권 2호 |
| 발표분야 | 구조재료 |
| 제목 | Al Closed Cell 발포금속의 기계적 특성 및 흡음 특성 |
| 초록 | Abstract. To avoid the disappearing of bubbles by coalescence or burst, foaming agent(TiH2) containing gas releasing component was used to fabricate the closed-cell Al foams. Melting was carried out near at 680℃ considering the melting point of recycled Al alloy and gas releasing point of TiH2. The velocity of decomposition decreased with decrease of the time and temperature. Mechanical properties of metal foams depend on cell type, shape, size, homogeneity, surface area and relative density, and particularly are proportional to their density. Deformation of metal foams includes the plastic deformation and collapse .and shows a plateau area followed by yielding point. Metal foams follow the morphological rules that are about cell type, size and homogeneity. Metal foams with homogeneous wall thickness and linear cell boundary show the similar mechanical properties to bulk metal and thickness averaged by diameter affect the mechanical properties more seriously than cell size. The acoustical performance of Al foam is considerably improved: its absorption coefficient shows over NRC 0.7 from 2000 to 4000Hz |
| 저자 | Yao Dapeng, Bo-Young Hur |
| 소속 | Gyeongsang National Univ. / K-MEM R&D Cluster-GSNU |
| 키워드 | Al foam; absorption energy; thermal conductivity; foaming agent; viscosity |
