| Title |
A Study on Sound Absorbing Mechanism and Process of Sintered Plate fo metal Powders Using Aluminum 6063 Matrix |
| Authors |
김상무(Sang Mu Kim); 강영곤(Young Kon Kang); 조성석(Seong Seock Cho) |
| Abstract |
Aluminum 6063 and Al-8wt%Si powders were produced by centrifugal atomization and mixing. They were sintered under pressure in N₂ atmosphere to make porous sound absorbing plate. The micromorphology of powder and sintered plate was observed by SEM and optical microscope. It is found that Si is thoroughly dispersed in the matrix (Al 6063 powders) of the plate. For the sound absorbing coefficient measurement, impedance tube method was applied. The relation between sound absorbing coefficient, density of sintered plate, volume and distribution of porosity was investigated. Sound absorbing effect through the influence of binder which leads to the constructive variation of porosity was also investigated. |