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Seiz M, Hierl H, Nestler B, Rheinheimer W. Revealing process and material parameter effects on densification via phase-field studies. Sci Rep 2024; 14:5350. [PMID: 38438392 PMCID: PMC10912692 DOI: 10.1038/s41598-024-51915-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 01/11/2024] [Indexed: 03/06/2024] Open
Abstract
Sintering is an important processing step in both ceramics and metals processing. The microstructure resulting from this process determines many materials properties of interest. Hence the accurate prediction of the microstructure, depending on processing and materials parameters, is of great importance. The phase-field method offers a way of predicting this microstructural evolution on a mesoscopic scale. The present paper employs this method to investigate concurrent densification and grain growth and the influence of stress on densification. Furthermore, the method is applied to simulate the entire freeze-casting process chain for the first time ever by simulating the freezing and sintering processes separately and passing the frozen microstructure to the present sintering model.
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Affiliation(s)
- Marco Seiz
- Institute for Applied Materials, Karlsruhe Institute of Technology, Straße am Forum 7, 76131, Karlsruhe, Germany.
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.
| | - Henrik Hierl
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Britta Nestler
- Institute for Applied Materials, Karlsruhe Institute of Technology, Straße am Forum 7, 76131, Karlsruhe, Germany
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Institute for Digital Materials, Karlsruhe University of Applied Sciences, Moltkestr. 30, 76133, Karlsruhe, Germany
| | - Wolfgang Rheinheimer
- Institute for Manufacturing Technology of Ceramic Components and Composites, University of Stuttgart, Allmandring 7B, 70569, Stuttgart, Germany
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Zhang Z, Qian P, Yang X, Wu B, Cai HL, Zhang FM, Wu XS. Manipulating the carrier concentration and phase transition via Nb content in SrTiO 3. Sci Rep 2022; 12:2499. [PMID: 35169173 PMCID: PMC8847566 DOI: 10.1038/s41598-021-03199-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 10/28/2021] [Indexed: 11/24/2022] Open
Abstract
SrTiO3 is a model of the perovskite-like compounds for structural transition which inducing the intriguing physical properties around the critical phase transition temperature TAFD (antiferrodistortive, abbrev. as AFD). Here we report that the electrical transport behavior is a new way to quantify Nb concentration for Nb-doped SrTiO3. The lattice parameter (c), phase transition temperature (TAFD), and the carrier concentration (n) of SrTiO3 may be manipulated by niobium doping. TAFD increases with increasing the niobium content in a rate of about 30 K per (wt%, i.e. niobium element's weight verses total weight) niobium and n in a rate of about 2.5 [Formula: see text] 1020/cm3 per (wt%) niobium.
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Affiliation(s)
- Zhe Zhang
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Peihua Qian
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Xingming Yang
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Baixi Wu
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - H L Cai
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - F M Zhang
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China
| | - X S Wu
- Institute of Materials Engineering, Nanjing University, Nantong, Jiangsu, 226019, China.
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, 210093, China.
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