|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
||Effect of Gradient Structure on the Sound Absorption Coefficient of Porous Metal Fiber Materials
||Jianzhong Wang, Qingbo Ao, Jun Ma, Huiping Tang
|On-Site Speaker (Planned)
Porous metal fiber materials (PMFMs) are a new type of materials combined structural with functional performances, with applications in the fields of noise controlling, filtration, surface combustion etc. The green felts of 316L stainless steel fibers with the fibers diameters of 8 ~ 20μm were used to manufacture the PMFMs with single-layer structure, two- and three-layer gradient structure, by the sintering process. The sound absorption coefficients of the PMFMs were measured in the 4206 two-microphone impedance tube, at the experimental frequency ranging from 50 Hz to 6400 Hz. The results show that the sound absorption coefficient of the gradient structure is largely affected by the interface between different layers and is higher than that of single-layer structure. Furthermore, for the two-layer gradient structure, when the porosity of the first layer is identical, the higher the porosity of the second layer is, the higher the sound absorption coefficient is.
||Planned: Supplemental Proceedings volume