Title :
Microstructured materials - propagation and use for impedance matching
Author :
Harris, P. ; Young, R. ; Dawson, A. ; Petherick, R. ; Lecarpentier, F.
Author_Institution :
Ind. Res. Ltd., Lower Hutt, New Zealand
Abstract :
This work considers the use of nano-porous materials as a means of providing impedance matching. A comparison is made to conventional loaded epoxy. We find that by varying the porosity an impedance range of 2 to 10 MRayl seems possible, a range where there are no common solids. The nano-porous structure acts as a waveguide with low losses. By comparison loaded epoxies have high absorption due to the wave scattering associated with the loading particles.
Keywords :
acoustic impedance; acoustic wave propagation; impedance matching; nanoporous materials; porosity; impedance matching; loaded epoxy; microstructured material; nanoporous materials; porosity; wave scattering; Absorption; Frequency; Impedance matching; Lattices; Microstructure; Nanostructured materials; Particle scattering; Powders; Solids; Tungsten; impedance; microstructure; propagation;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5441813
