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Monday, July 8 • 11:00 - 13:30

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Porous materials (PMs) are known to have been used since the development of powder metallurgy. The main fields of PM include: filtering, node sealing, cooling, vibration and sound suppression. In particular, PMs are used to muffle the exhaust of technological equipment. PM samples are manufactured by melting, pressing, and also by chemical means, while the structure is difficult to be reproduced again with a high degree of accuracy. Such a 3D printing method as selective laser melting (SLM) allows obtaining samples with a low deviation of the structure (up to 13%) in a wide range of porosity P=0.3...0.7. The increase in sound absorption factor and expansion of the frequency range can be achieved by selecting the effective porosity and pores tortuosity coefficient. The high coefficient of normal sound absorption and high manufacturability determine the popularity of application of samples obtained by 3D printing methods in noise suppression designs

Monday July 8, 2019 11:00 - 13:30 EDT
St-Laurent 3, Board 10-A