# Microgravity effects on nonequilibrium melt processing of neodymium titanate: thermophysical properties, atomic structure, glass formation and crystallization https://mdr.nims.go.jp/datasets/4eaebfc7-3d34-4059-99a0-042163846d28 ## File - [s41526-024-00371-x.pdf](https://mdr.nims.go.jp/filesets/ce0c4edf-6883-42e9-8222-4cc579bc09a5/download) ([Detail](https://mdr.nims.go.jp/filesets/ce0c4edf-6883-42e9-8222-4cc579bc09a5.md)) ## Id 4eaebfc7-3d34-4059-99a0-042163846d28 ## Local identifier ## Visibility open_to_public ## State published ## Created at 2024-03-29T00:31:45.764378Z ## Updated at 2024-04-01T05:02:38.183541Z ## Published at 2024-04-01T03:30:21.746359Z ## Doi ## First published url https://doi.org/10.1038/s41526-024-00371-x ## Date published 2024-03-06 ## Recorded date published ## Resource type journal_article ## Manuscript type vor ## Collection ## Title - title: 'Microgravity effects on nonequilibrium melt processing of neodymium titanate: thermophysical properties, atomic structure, glass formation and crystallization' title_type: original lang: en ## Description - 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 83TiO2-17Nd2O3, 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-1 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. % Nd2O3. 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 Nd2O3 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. description_type: abstract lang: und - 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 83TiO2-17Nd2O3, 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-1 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. % Nd2O3. 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 Nd2O3 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. description_type: abstract lang: und - 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 83TiO2-17Nd2O3, 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-1 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. % Nd2O3. 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 Nd2O3 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. description_type: abstract lang: und - 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 83TiO2-17Nd2O3, 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-1 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. % Nd2O3. 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 Nd2O3 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. description_type: abstract lang: und ## Creator - name: Stephen K. Wilke role: author orcid: https://orcid.org/0000-0003-4674-7049 - name: Abdulrahman Al-Rubkhi role: author - name: Chihiro Koyama role: author - name: Takehiko Ishikawa role: author orcid: https://orcid.org/0000-0003-0769-3869 - name: Hirohisa Oda role: author - name: Brian Topper role: author - name: Elizabeth M. Tsekrekas role: author orcid: https://orcid.org/0000-0001-9417-8827 - name: Doris Möncke role: author orcid: https://orcid.org/0000-0002-4197-5520 - name: Oliver L. G. Alderman role: author orcid: https://orcid.org/0000-0002-2342-811X - name: Vrishank Menon role: author - name: Jared Rafferty role: author - name: Emma Clark role: author - name: Alan L. Kastengren role: author - name: Chris J. Benmore role: author orcid: https://orcid.org/0000-0001-7007-7749 - name: Jan Ilavsky role: author orcid: https://orcid.org/0000-0003-1982-8900 - name: Jörg Neuefeind role: author orcid: https://orcid.org/0000-0002-0563-1544 - name: Shinji Kohara role: author orcid: https://orcid.org/0000-0001-9596-2680 - name: Michael SanSoucie role: author orcid: https://orcid.org/0000-0002-3575-2275 - name: Brandon Phillips role: author - name: Richard Weber role: author orcid: https://orcid.org/0000-0002-2145-1279 ## Contact agent ## Publisher ## Managing organization ## Keyword - subject: Liquid schema: not_defined - subject: Structure schema: not_defined - subject: levitation schema: not_defined - subject: Thermophysical properties schema: not_defined ## Rights - identifier: https://creativecommons.org/licenses/by/4.0/ ## Other identifier(s) ## Data origin - data_origin_type: other ## Embargo ## Journal - title: npj Microgravity issn: '23738065' volume: '10' article_number: '26' ## Conference ## Related item ## Funding ## Instrument ## Instrument operator ## Instrument managing organization ## Measurement method ## Specimen ## Chemical composition ## Structure for specimen ## Structural feature for specimen ## Specific property for specimen ## Process for specimen treatment ## Computational method ## Energy level/transition state ## Software ## Custom property ## Fileset - id: ce0c4edf-6883-42e9-8222-4cc579bc09a5 filename: s41526-024-00371-x.pdf content_type: application/pdf size: 2915568 md5: ff31b732b7064a8ec70bb1a0111b8ba3 ## Thumbnail fileset_id: ce0c4edf-6883-42e9-8222-4cc579bc09a5 filename: s41526-024-00371-x.pdf