The Experts below are selected from a list of 4473 Experts worldwide ranked by ideXlab platform
Mikko Ritala - One of the best experts on this subject based on the ideXlab platform.
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towards space grade 3d printed ald coated small satellite propulsion components for fluidics
Additive manufacturing, 2018Co-Authors: Antti Kestila, Kalle Nordling, Ville Miikkulainen, Mikko Kaipio, Tuomas Tikka, Mika Salmi, Aleksi Auer, Markku Leskela, Mikko RitalaAbstract:Abstract Space technology has been an Early Adopter of additive manufacturing (AM) as a way of quickly producing relatively complex systems and components that would otherwise require expensive and custom design and production. Space as an environment and long-term survivability pose challenges to materials used in AM and these challenges need to be addressed. Atomic layer deposition (ALD) is an effective coating method enabling conformal and precise coating of the complete AM print. This work analyses how an ALD coating of aluminium oxide on acrylonitrile butadiene styrene (ABS) and polyamide PA 2200 plastic AM prints benefits and protects them. This was studied in the context of in-space propulsion fluidics, where propellant flow properties also matter. AM was performed with material extrusion and selective laser sintering methods that are commonly used. Tests were performed with a simple bang-bang controller test setup and a mass spectrometer, and the existence of the coating was confirmed with scanning electron microscope imaging.
Antti Kestila - One of the best experts on this subject based on the ideXlab platform.
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towards space grade 3d printed ald coated small satellite propulsion components for fluidics
Additive manufacturing, 2018Co-Authors: Antti Kestila, Kalle Nordling, Ville Miikkulainen, Mikko Kaipio, Tuomas Tikka, Mika Salmi, Aleksi Auer, Markku Leskela, Mikko RitalaAbstract:Abstract Space technology has been an Early Adopter of additive manufacturing (AM) as a way of quickly producing relatively complex systems and components that would otherwise require expensive and custom design and production. Space as an environment and long-term survivability pose challenges to materials used in AM and these challenges need to be addressed. Atomic layer deposition (ALD) is an effective coating method enabling conformal and precise coating of the complete AM print. This work analyses how an ALD coating of aluminium oxide on acrylonitrile butadiene styrene (ABS) and polyamide PA 2200 plastic AM prints benefits and protects them. This was studied in the context of in-space propulsion fluidics, where propellant flow properties also matter. AM was performed with material extrusion and selective laser sintering methods that are commonly used. Tests were performed with a simple bang-bang controller test setup and a mass spectrometer, and the existence of the coating was confirmed with scanning electron microscope imaging.
David Popp - One of the best experts on this subject based on the ideXlab platform.
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international innovation and diffusion of air pollution control technologies the effects of nox and so2 regulation in the us japan and germany
Journal of Environmental Economics and Management, 2006Co-Authors: David PoppAbstract:Using patent data from the United States, Japan, and Germany, this paper examines both innovation and diffusion of air pollution control equipment. Whereas the United States was an Early Adopter of stringent sulfur dioxide (SO2) standards, both Japan and Germany introduced stringent nitrogen dioxide (NOX) standards much earlier than the US. Nonetheless, in both cases, tightened standards in the US led to more domestic patenting, but not more foreign patenting. Overall, the data suggest that inventors respond to environmental regulatory pressure in their own country, but not to foreign environmental regulations. Moreover, any technology transfer that occurs appears to be indirect. Domestic innovation occurs even for technologies that have already experienced significant innovative activity abroad and utilities purchase pollution abatement equipment from domestic firms. However, patent citation data from the US do show that earlier foreign patents are an important building block for NOX pollution control innovations in the US.
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international innovation and diffusion of air pollution control technologies the effects of nox and so2 regulation in the us japan and germany
National Bureau of Economic Research, 2004Co-Authors: David PoppAbstract:Using patent data from the United States, Japan, and Germany, this paper examines both the innovation and diffusion of air pollution control equipment. Whereas the United States was an Early Adopter of stringent sulfur dioxide (SO2) standards, both Japan and Germany introduced stringent nitrogen dioxide (NOX) standards much earlier than the US. Nonetheless, in both cases, tightened standards in the U.S. led to more domestic patenting, but not more foreign patenting. Overall, the data suggest that inventors respond to environmental regulatory pressure in their own country, but not to foreign environmental regulations. Moreover, any technology transfer that occurs appears to be indirect. Domestic innovation occurs even for technologies that have already experienced significant innovative activity abroad. Moreover, utilities in countries that adopt regulations later nonetheless purchase pollution abatement equipment from domestic firms. However, patent citation data from the U.S. show that earlier foreign patents are an important building block for NOX pollution control innovations in the U.S., suggesting that American inventors build on technological advances made in countries that adopted stringent regulation earlier.
Tuomas Tikka - One of the best experts on this subject based on the ideXlab platform.
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towards space grade 3d printed ald coated small satellite propulsion components for fluidics
Additive manufacturing, 2018Co-Authors: Antti Kestila, Kalle Nordling, Ville Miikkulainen, Mikko Kaipio, Tuomas Tikka, Mika Salmi, Aleksi Auer, Markku Leskela, Mikko RitalaAbstract:Abstract Space technology has been an Early Adopter of additive manufacturing (AM) as a way of quickly producing relatively complex systems and components that would otherwise require expensive and custom design and production. Space as an environment and long-term survivability pose challenges to materials used in AM and these challenges need to be addressed. Atomic layer deposition (ALD) is an effective coating method enabling conformal and precise coating of the complete AM print. This work analyses how an ALD coating of aluminium oxide on acrylonitrile butadiene styrene (ABS) and polyamide PA 2200 plastic AM prints benefits and protects them. This was studied in the context of in-space propulsion fluidics, where propellant flow properties also matter. AM was performed with material extrusion and selective laser sintering methods that are commonly used. Tests were performed with a simple bang-bang controller test setup and a mass spectrometer, and the existence of the coating was confirmed with scanning electron microscope imaging.
Markku Leskela - One of the best experts on this subject based on the ideXlab platform.
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towards space grade 3d printed ald coated small satellite propulsion components for fluidics
Additive manufacturing, 2018Co-Authors: Antti Kestila, Kalle Nordling, Ville Miikkulainen, Mikko Kaipio, Tuomas Tikka, Mika Salmi, Aleksi Auer, Markku Leskela, Mikko RitalaAbstract:Abstract Space technology has been an Early Adopter of additive manufacturing (AM) as a way of quickly producing relatively complex systems and components that would otherwise require expensive and custom design and production. Space as an environment and long-term survivability pose challenges to materials used in AM and these challenges need to be addressed. Atomic layer deposition (ALD) is an effective coating method enabling conformal and precise coating of the complete AM print. This work analyses how an ALD coating of aluminium oxide on acrylonitrile butadiene styrene (ABS) and polyamide PA 2200 plastic AM prints benefits and protects them. This was studied in the context of in-space propulsion fluidics, where propellant flow properties also matter. AM was performed with material extrusion and selective laser sintering methods that are commonly used. Tests were performed with a simple bang-bang controller test setup and a mass spectrometer, and the existence of the coating was confirmed with scanning electron microscope imaging.
