The Experts below are selected from a list of 51594 Experts worldwide ranked by ideXlab platform
Rachel Orenstein - One of the best experts on this subject based on the ideXlab platform.
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Solid Solution Formation in mg2 si sn and shape of the miscibility gap
2020Co-Authors: Mohammad Yasseri, Aryan Sankhla, Hasbuna Kamila, Rachel Orenstein, D Nhi Y Truong, Nader Farahi, Johannes De BoorAbstract:Abstract Investigation of the thermochemical stability of Mg2(Si,Sn) thermoelectric materials is crucial for further development of thermoelectric modules. There is a miscibility gap reported for the quasibinary Mg2Si–Mg2Sn series, though the exact compositions of its limits are disputed. Gaining a better understanding of intersolubility limits in Mg2(Si,Sn) is important for further optimization of material performance by exploiting the gap-induced phase segregation. For a better understanding on the boundaries of the miscibility gap below 700°C, two approaches were taken to provide evidence of thermodynamic stable phases and, hereby, monitor the borders of the miscibility gap. The approaches cover the homogenization of Mg2SixSn1-x at 700°C and diffusion couple experiments at 600°C, 525°C, and 450°C. For 600°C we find two ranges where Mg2Si and Mg2Sn are not miscible, namely x = 0.35 ± 0.05 and x = 0.75 ± 0.05 for miscibility gap I and 0.85 ± 0.05
Mohammad Yasseri - One of the best experts on this subject based on the ideXlab platform.
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Solid Solution Formation in mg2 si sn and shape of the miscibility gap
2020Co-Authors: Mohammad Yasseri, Aryan Sankhla, Hasbuna Kamila, Rachel Orenstein, D Nhi Y Truong, Nader Farahi, Johannes De BoorAbstract:Abstract Investigation of the thermochemical stability of Mg2(Si,Sn) thermoelectric materials is crucial for further development of thermoelectric modules. There is a miscibility gap reported for the quasibinary Mg2Si–Mg2Sn series, though the exact compositions of its limits are disputed. Gaining a better understanding of intersolubility limits in Mg2(Si,Sn) is important for further optimization of material performance by exploiting the gap-induced phase segregation. For a better understanding on the boundaries of the miscibility gap below 700°C, two approaches were taken to provide evidence of thermodynamic stable phases and, hereby, monitor the borders of the miscibility gap. The approaches cover the homogenization of Mg2SixSn1-x at 700°C and diffusion couple experiments at 600°C, 525°C, and 450°C. For 600°C we find two ranges where Mg2Si and Mg2Sn are not miscible, namely x = 0.35 ± 0.05 and x = 0.75 ± 0.05 for miscibility gap I and 0.85 ± 0.05
O A Lodochnikova - One of the best experts on this subject based on the ideXlab platform.
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structural aspects of partial Solid Solution Formation two crystalline modifications of a chiral derivative of 1 5 dihydro 2h pyrrol 2 one under consideration
2017Co-Authors: O A Lodochnikova, Liliya S Kosolapova, Alina F Saifina, A T Gubaidullin, Robert R Fayzullin, Ayrat R Khamatgalimov, I A Litvinov, Almira KurbangalievaAbstract:The purposeful change of crystallization conditions for rac-3-chloro-5-hydroxy-1-(4-methylbenzyl)-4-[(4-methylphenyl)sulfanyl]-1,5-dihydro-2H-pyrrol-2-one 1 leads to two different crystal modifications, namely, a racemic compound in the triclinic space group P with Z′ = 1 (α-1) and a partial Solid Solution based on a racemic compound in the monoclinic space group P21 with Z′ = 4 (β-1). The first modification, α-1, is characterized by a higher density of the molecular packing in the crystal, while the second one, β-1, by a stronger system of hydrogen bonds and the presence of positional and substitutional disorder simultaneously. The analysis of the crystal structure of modifications α and β allowed us to define some structural aspects of the partial Solid Solution Formation. Namely, the tendency to build a stronger hydrogen bond system enables the Solution of enantiomers of 1 to be formed in the crystalline phase, whereas the propensity of the molecules to adopt a more favorable transoid conFormation limits the solubility of the minor enantiomer.
Johannes De Boor - One of the best experts on this subject based on the ideXlab platform.
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Solid Solution Formation in mg2 si sn and shape of the miscibility gap
2020Co-Authors: Mohammad Yasseri, Aryan Sankhla, Hasbuna Kamila, Rachel Orenstein, D Nhi Y Truong, Nader Farahi, Johannes De BoorAbstract:Abstract Investigation of the thermochemical stability of Mg2(Si,Sn) thermoelectric materials is crucial for further development of thermoelectric modules. There is a miscibility gap reported for the quasibinary Mg2Si–Mg2Sn series, though the exact compositions of its limits are disputed. Gaining a better understanding of intersolubility limits in Mg2(Si,Sn) is important for further optimization of material performance by exploiting the gap-induced phase segregation. For a better understanding on the boundaries of the miscibility gap below 700°C, two approaches were taken to provide evidence of thermodynamic stable phases and, hereby, monitor the borders of the miscibility gap. The approaches cover the homogenization of Mg2SixSn1-x at 700°C and diffusion couple experiments at 600°C, 525°C, and 450°C. For 600°C we find two ranges where Mg2Si and Mg2Sn are not miscible, namely x = 0.35 ± 0.05 and x = 0.75 ± 0.05 for miscibility gap I and 0.85 ± 0.05
Dmytro Demirskyi - One of the best experts on this subject based on the ideXlab platform.
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high temperature flexural strength performance of ternary high entropy carbide conSolidated via spark plasma sintering of tac zrc and nbc
2019Co-Authors: Dmytro Demirskyi, Hanna Borodianska, Tohru S Suzuki, Yoshio Sakka, Kyosuke Yoshimi, Oleg VasylkivAbstract:Abstract The Solid Solution Formation and conSolidation of the (Ta,Zr,Nb)C single-phase ceramic made from commercial TaC, ZrC and NbC powders prepared by spark plasma sintering at the temperature of 1920 °C was investigated. Phase analysis and lattice parameter measurements by X-ray diffraction showed multi-stage Formation of the single-phase high-entropy-type carbide with the lattice parameter of 4.535 A. The flexural strength and fracture toughness at room temperature were 460 ± 24 MPa and 2.9 MPa m1/2, respectively. With an increase in temperature, the flexural strength showed an increase up to 1600 °C to 496 ± 44 MPa, then decreased after 1800 °C to 366 ± 46 MPa.