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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 181 records · Page 10

All sources NASA NTRS DOE OSTI

DOE OSTI2024

Influence of salinity gradients on the diffusion of water and ionic species in dual porosity clay samples

Not Available

58 GEOSCIENCES↗

DOE OSTI2022

Powder-borne porosity in directed energy deposition

Not provided.

Engineering↗

DOE OSTI2023

Porosity, roughness, and passive film morphology influence the corrosion behavior of 316L stainless steel manufactured by laser powder bed fusion

Not Available

42 ENGINEERING↗

DOE OSTI2024

Probability of detection of porosity defects for electron beam powder bed fusion additive manufacturing using total electron emissions

Not Available

Peverall, Dylan↗

DOE OSTI2023

Data-driven statistical reduced-order modeling and quantification of polycrystal mechanics leading to porosity-based ductile damage

Not provided.

Materials Science↗

DOE OSTI2020

Neutron dark-field imaging applied to porosity and deformation-induced phase transitions in additively manufactured steels

Not Available

36 MATERIALS SCIENCE↗

DOE OSTI2021

Part-scale thermal simulation of laser powder bed fusion using graph theory: Effect of thermal history on porosity, microstructure evolution, and recoater crash

Not Available

Yavari, Reza↗

DOE OSTI2021

Increasing fracture toughness via architected porosity

Not Available

Conway, Kaitlynn M. (ORCID:0000000188323258)↗

DOE OSTI2022

Role of side-chain length on gas transport of CO 2 /CH 4 mixtures in polymers with side-chain porosity

Polymers of intrinsic microporosity (PIMs) are traditionally formed from ladder backbones, but recent synthetic advances have allowed for the formation of non-traditional PIMs using a poly(ladder) motif, whereby rigid PIM-like sidechains are appended onto more flexible backbones. The effect of side-chain length on free volume and gas transport properties was recently evaluated for a methoxy-functionalized poly(ladder) (OMe-ROMP). In this study, we elaborate on the role of side-chain length and its influence on mixed-gas performance and plasticization stability for OMe-ROMP. Pure-gas sorption results are also reported, including hysteresis effects from CO 2 conditioning. Taken together, this study reveals the role of side-chain length on gas sorption, diffusion, and plasticization for CO 2 /CH 4 separations. Finally, we conclude that the length of a rigid side chain in the poly(ladder) motif is a valuable structural parameter to control sorption, diffusion, and stability towards plasticization for gas separation membrane materials.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗

DOE OSTI2020