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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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Mineral assemblage transformation of a metakaolin-based waste form after geopolymer encapsulation
Current plans for nuclear waste vitrification at the Hanford Tank Waste Treatment and Immobilization Plant (WTP) lack the capacity to treat all of the low activity waste (LAW) that is not encapsulated in the vitrified product. Fluidized Bed Steam Reforming (FBSR) is one of the supplemental technologies under consideration to fill this gap. The FBSR process results in a granular product mainly composed of feldspathoid mineral phases that encapsulate the LAW and other contaminants of concern (COCs). In order to better understand the characteristics of the FBSR product, characterization testing has been performed on the granular product as well as the granular product encapsulated in a monolithic geopolymer binder. The non-radioactive simulated tank waste samples created for use in this study are the result of a 2008 Department of Energy sponsored Engineering Scale Technology Demonstration (ESTD) in 2008. These samples were created from waste simulant that was chemically shimmed to resemble actual tank waste, and rhenium has been used as a substitute for technetium. Another set of samples was created by the Savannah River Site Bench-Scale Reformer (BSR) using a chemical shim of Savannah River Site Tank 50 waste in order to simulate a blend of 68 Hanford tank wastes. This paper presents results from coal and moisture removal tests along with XRD, SEM, and BET analyses showing that the major mineral components are predominantly sodium aluminosilicate minerals and that the mineral product is highly porous. Results also show that the materials pass the short-term leach tests: the Toxicity Characteristic Leaching Procedure (TCLP) and Product Consistency Test (PCT).
Cryogenic-temperature-induced phase transformation in a CuZr-based bulk metallic glass composite under tensile stress
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Ductile Ti-rich high-entropy alloy controlled by stress induced martensitic transformation and mechanical twinning
Abstract not provided
Irreversible phase transformation in a CoCrFeMnNi high entropy alloy under hydrostatic compression
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Development of computational framework for titanium alloy phase transformation prediction in laser powder-bed fusion additive manufacturing
Not Available
Phase transformation and chemical decomposition of nanocrystalline SnO2 under heavy ion irradiation
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Lessons for machine learning from the analysis of porosity-permeability transforms for carbonate reservoirs
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Transformation of conventional transformers for enhanced DC mitigation in AC power networks with advanced grid support
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Phase transformation induced plasticity in high-strength hexagonal close packed Co with stacking faults
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Using Genome-Editing Technologies to Mitigate Antimicrobial Resistance [CRISPR-Based Antibacterials: Transforming Bacterial Defense into Offense]
The development of antimicrobial-resistant (AMR) bacteria poses a serious worldwide health concern. CRISPR-based antibacterials, however, are a novel and adaptable method for building an arsenal of antibacterials potentially capable of targeting any pathogenic bacteria.
Fast Atomic-Scale Chemical Imaging by STEM EDS for Study of Crystalline Materials and Dynamic Phase Transformations.
Abstract not provided.
Layered-to-Rock-Salt Transformation in Desodiated Na x CrO 2 ( x 0.4)
Abstract not provided