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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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Deformation mechanisms of multiphase microstructures in laser powder bed fusion processed stainless steels
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On the formation of spherical metastable BCC single crystal spatter particles during laser powder bed fusion
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Wall conditioning effects and boron migration during boron powder injection in ASDEX Upgrade
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D retention in e-beam powder-bed fused (3-D printed) tungsten exposed to high-flux deuterium plasma in Pisces-RF
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Boron powder injection experiments in WEST with a fully actively cooled, ITER grade, tungsten divertor
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Discrete element modeling of irregular-shaped soft pine particle flow in an FT4 powder rheometer
Pine residues are a commonly used biomass feedstock that consists of different anatomical fractions, each with distinct particle characteristics. Here, in this work, an experiment-informed discrete element model is developed to investigate the flowability of pine residues in an FT4 rheometer. Multi-sphere particles with distinct particle attributes are created to model each anatomical fraction type. A systematic analysis of specimens with varying particle characteristics (e.g., anatomical fraction type, particle shape, and size) is conducted to elucidate the relationship between particle attributes and flowability. The results show that stems recorded the highest axial force and torque and, correspondingly, the highest flow energy, which is attributed to their high stiffness and interlocking effect. Increasing their percentage in the mixture increases the flow energy while increasing needles tends to decrease flow energy. Knowledge gained in this study on the flow of anatomical fractions is important for the efficient and robust processing of pine residues.
Fast spatial laser beam modulation for improved process control in Laser Powder Bed Fusion
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Describing the Influence of Ball-milling on the Amorphization of Flubendazole Using the PDF and RMC Methods with X-ray Powder Diffraction Data
Flubendazole (FBZ) is a poorly water-soluble drug, and different methodologies have been proposed to improve its oral bioavailability. Obtaining the amorphous drug phase is an alternative to improve its water solubility. Several techniques for drug amorphization, such as spray drying, lyophilization, melt quenching, solvent-evaporation, and ball milling, can yield various types of structural disorder and possibly render variations in physicochemical properties. Herein, we focus on evaluating the influence of the ball-milling process on the amorphization of FBZ. The characterization of the average global and local structures before, during, and after the milling process is described by sequential Rietveld refinements, pair distribution function analysis, and the Reverse Monte Carlo method. In conclusion, we show that preserving the local structure (nearest molecules) can be responsible for avoiding the fast structure recrystallization commonly observed when using the solvent-evaporation process for the studied drug.
A practical guide to pharmaceutical analyses using X-ray powder diffraction
Abstract not provided
Powder X-ray diffraction of flucytosine, C[subscript 4]H[subscript 4]FN[subscript 3]O
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Powder X-ray diffraction of trimethoprim Form I, C[subscript 14]H[subscript 18]N[subscript 4]O[subscript 3]
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Powder X-ray diffraction of oseltamivir phosphate (Tamiflu®), C[subscript 16]H[subscript 31]N[subscript 2]O[subscript 8]P
Abstract not provided
Powder X-ray diffraction of azelastine hydrochloride, C[subscript 22]H[subscript 25]ClN[subscript 3]
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Powder X-ray diffraction of pazopanib hydrochloride Form 1, C[subscript 21]H[subscript 24]N[subscrip
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Powder X-ray diffraction of varenicline hydrogen tartrate Form B (Chantix?), (C[subscript 13]H[subsc
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Powder X-ray diffraction of daclatasvir dihydrochloride Form N-2 (Daklinza?), C[subscript 40]H[subsc
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Redox Properties of Hexagonal and Cubic Sr 0.4 Ba 0.6 Mn 0.94 Ti 0.06 O 3−δ Investigated by In Situ Neutron Powder Diffraction
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