{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Wilke SK"],"funding":["National Aeronautics and Space Administration (NASA)","U.S. Department of Energy (DOE)"],"pagination":["26"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC10918169"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["10(1)"],"pubmed_abstract":["The relationships between materials processing and structure can vary between terrestrial and reduced gravity environments. As one case study, we compare the nonequilibrium melt processing of a rare-earth titanate, nominally 83TiO<sub>2</sub>-17Nd<sub>2</sub>O<sub>3</sub>, and the structure of its glassy and crystalline products. Density and thermal expansion for the liquid, supercooled liquid, and glass are measured over 300-1850 °C using the Electrostatic Levitation Furnace (ELF) in microgravity, and two replicate density measurements were reproducible to within 0.4%. Cooling rates in ELF are 40-110 °C s<sup>-1</sup> lower than those in a terrestrial aerodynamic levitator due to the absence of forced convection. X-ray/neutron total scattering and Raman spectroscopy indicate that glasses processed on Earth and in microgravity exhibit similar atomic structures, with only subtle differences that are consistent with compositional variations of ~2 mol. % Nd<sub>2</sub>O<sub>3</sub>. The glass atomic network contains a mixture of corner- and edge-sharing Ti-O polyhedra, and the fraction of edge-sharing arrangements decreases with increasing Nd<sub>2</sub>O<sub>3</sub> content. X-ray tomography and electron microscopy of crystalline products reveal substantial differences in microstructure, grain size, and crystalline phases, which arise from differences in the melt processes."],"journal":["NPJ microgravity"],"pubmed_title":["Microgravity effects on nonequilibrium melt processing of neodymium titanate: thermophysical properties, atomic structure, glass formation and crystallization."],"pmcid":["PMC10918169"],"funding_grant_id":["80NSSC19K1288","DE-SC0018601"],"pubmed_authors":["Ishikawa T","Topper B","Alderman OLG","Al-Rubkhi A","Clark E","Kohara S","Menon V","Benmore CJ","SanSoucie M","Ilavsky J","Koyama C","Kastengren AL","Rafferty J","Wilke SK","Neuefeind J","Phillips B","Tsekrekas EM","Oda H","Moncke D","Weber R"],"additional_accession":[]},"is_claimable":false,"name":"Microgravity effects on nonequilibrium melt processing of neodymium titanate: thermophysical properties, atomic structure, glass formation and crystallization.","description":"The relationships between materials processing and structure can vary between terrestrial and reduced gravity environments. As one case study, we compare the nonequilibrium melt processing of a rare-earth titanate, nominally 83TiO<sub>2</sub>-17Nd<sub>2</sub>O<sub>3</sub>, and the structure of its glassy and crystalline products. Density and thermal expansion for the liquid, supercooled liquid, and glass are measured over 300-1850 °C using the Electrostatic Levitation Furnace (ELF) in microgravity, and two replicate density measurements were reproducible to within 0.4%. Cooling rates in ELF are 40-110 °C s<sup>-1</sup> lower than those in a terrestrial aerodynamic levitator due to the absence of forced convection. X-ray/neutron total scattering and Raman spectroscopy indicate that glasses processed on Earth and in microgravity exhibit similar atomic structures, with only subtle differences that are consistent with compositional variations of ~2 mol. % Nd<sub>2</sub>O<sub>3</sub>. The glass atomic network contains a mixture of corner- and edge-sharing Ti-O polyhedra, and the fraction of edge-sharing arrangements decreases with increasing Nd<sub>2</sub>O<sub>3</sub> content. X-ray tomography and electron microscopy of crystalline products reveal substantial differences in microstructure, grain size, and crystalline phases, which arise from differences in the melt processes.","dates":{"release":"2024-01-01T00:00:00Z","publication":"2024 Mar","modification":"2025-04-06T23:34:45.288Z","creation":"2025-04-04T12:34:43.334Z"},"accession":"S-EPMC10918169","cross_references":{"pubmed":["38448495"],"doi":["10.1038/s41526-024-00371-x"]}}