Article
Metallurgy & Metallurgical Engineering
X. Wen, M. Shevchenko, E. Jak
Summary: The phase equilibria of the PbO-CuO0.5 and PbO-CuO0.5-FeO1.5 slag systems in equilibrium with solid metallic copper and/or liquid metallic lead-copper alloy were studied. The compositions in the liquid slag, solid oxide, and metallic phases were directly measured. Phase equilibria data on several primary phases were obtained, and it was discovered that the copper plumbite phase melted incongruently contradicting previous studies.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Materials Science, Ceramics
Renze Xu, Zhen Wang
Summary: In this work, the liquidus temperature of CaO-SiO2-Fe2O3-TiO2 slags was studied using HTCLSM and high temperature equilibration and quenching method. Raman and XPS spectra were obtained for quenched slags with different TiO2 content and at different quenched temperatures to analyze the structure characteristics. The results showed that the slag liquidus temperature decreased with the addition of TiO2. Raman and XPS spectra analysis revealed that TiO2 could depolymerize the slag network structure and decrease the quantity of complex silicate units.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Xingbang Wan, Min Chen, Yuchao Qiu, Junjie Shi, Jianzhong Li, Changsheng Liu, Pekka Taskinen, Ari Jokilaakso
Summary: The addition of manganese oxide promotes perovskite precipitation by expanding the primary phase field towards both higher and lower TiO2 content areas, as confirmed by experimental results and simulations using FactSage. The equilibrium between liquid and perovskite phases with manganese oxide shows significant overlap in compositions between 0-15 wt% Mn3O4, mainly located at w (CaO)/w (SiO2) ratios between 0.9 and 1.1.
CERAMICS INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Shi-yu He, Qi-sheng Feng, Bao-hua Duan, Guang-yao Chen, Zhu Wu, Chong-he LI, Xiong-gang Lu
Summary: In this study, the phase diagram of the ZrO2-CaO-TiO2 system was investigated using the CALPHAD method, and the isothermal sections were calculated at two temperatures. The experimental and predicted phase relationships showed good agreement, validating the accuracy and reliability of the simulations. The obtained thermodynamic database provides important reference data for the development of photocatalytic and refractory materials.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Jiang Chen, Siyu Cheng, Maksym Shevchenko, Peter C. Hayes, Evgueni Jak
Summary: Silico-ferrite of calcium and aluminum (SFCA) is the major bonding phase in iron ore sintering process, and its thermodynamic stability is closely related to oxygen partial pressure and temperature. Experimental measurements show that the CaO/SiO2 ratio in the SFCA phase is similar to that in the liquid phase, while the distribution ratio of Al2O3 between SFCA and liquid is in the range 2/1 to 3/1.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Crystallography
Mohammad Aljarrah, Jasim Alnahas, Mohammed Alhartomi
Summary: Magnesium alloys are considered strong candidates for various applications in automobile and aerospace industries due to their low density and specific strength. Micro-alloying magnesium with zinc, yttrium, and cerium can enhance mechanical properties through grain refinement and precipitation hardening. The thermodynamic modeling and mechanical property comparison between commercial magnesium alloys and magnesium-zinc-{yttrium and cerium} have important implications for the development of magnesium alloys.
Article
Materials Science, Ceramics
Renze Xu, Zhen Wang
Summary: High-temperature equilibration experiments were conducted to study the liquidus temperature of CaO-SiO2-TiO2-MnO slags, revealing that the addition of MnO could lower the liquidus temperature. The Raman spectra of quenched slags with different superheat degrees and varying MnO content were analyzed, providing insights into the structural characteristics of the slags. The study also found that higher superheat degrees simplified the complex structure of the slags, while increasing MnO content weakened the silicate network stability by breaking the Si-O bonds.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Thermodynamics
Jinfa Liao, Baojun Zhao
Summary: Phase equilibria studies have been conducted for the first time in a specific system, revealing the stabilization and extension effects of Al2O3 on spinel and melilite phases. Difference in liquidus temperatures between experimental data and FactSage calculations were observed, providing valuable insights for industrial applications and database optimization.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2021)
Article
Materials Science, Ceramics
Anatoly S. Arkhipin, Alexander Pisch, Georgii M. Zhomin, Semen V. Kuzovchikov, Alexandra V. Khvan, Natalia N. Smirnova, Alexey V. Markin, Nikita A. Kovalenko, Irina A. Uspenskaya
Summary: This study investigated the thermodynamic properties of a Ca12Al14O33 (C12A7) binary glass and the effects of titania additions (+5 and 7 wt%). Three different calorimetric techniques were used: low-temperature adiabatic, high-temperature drop solution, and transposed temperature drop calorimetry. The enthalpy of formation from oxides at 298.15 K and the enthalpy of dissolution of TiO2 (rut) at 1073.15 K were determined. The results showed that TiO2 additions had no influence on the heat capacity of C12A7, but caused a negative deviation of the enthalpy of formation from oxides.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Min Chen, Xingbang Wan, Pekka Taskinen, Dmitry Sukhomlinov, Junjie Shi, Radoslaw Michallik, Ari Jokilaakso
Summary: The equilibrium phase relations of the MgO-CaO-TiO2 system were investigated using high-temperature isothermal equilibration and rapid quenching technique. The results deviate significantly from previous observations and predictions by MTDATA and FactSage, especially in the perovskite primary phase field.
CERAMICS INTERNATIONAL
(2022)
Article
Thermodynamics
Wenke Zhi, Xiaoyi Chen, Fei Wang, Yang Tian, Bin Yang, Yongnian Dai, Kai Tang
Summary: The thermodynamic properties of the CaO-Gd2O3-SiO2 ternary system were successfully described through experimental data and thermodynamic modelling, with the modelling ternary phase equilibria showing good agreement with literature experimental data.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2021)
Article
Materials Science, Ceramics
Zhengyue Liu, Lifeng Sun, Hui Zhao, Taiyu Xiang, Jiyu Qiu, Maofa Jiang
Summary: In this study, the phase equilibria of the CaO-SiO2-Nb2O5-Fe2O3-TiO2 system at 1200 degrees C were investigated for the first time. The solid phase coexistence region and liquidus surfaces were determined using high temperature equilibrium experiments and mathematical methods. The results provide theoretical guidance for the enrichment and extraction processes of niobium and titanium resources in the Bayan Obo tailing.
CERAMICS INTERNATIONAL
(2022)
Article
Thermodynamics
Lin Liao, Yanwen Liu, Shuhong Liu, Bo Jin, Yong Du
Summary: This study re-assessed the ternary Ag-Ni-Sn and constituent binary Ag-Sn and Ni-Sn systems using the CALPHAD method and improved the thermodynamic descriptions based on available experimental data. The updated thermodynamic parameters were found to be reliable and accurate through comprehensive comparisons with experimental data.
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
(2022)
Article
Materials Science, Ceramics
Sun Yong Kwon, In-Ho Jung
Summary: The optimized Gibbs energies of all phases in the Al2O3-ZrO2, CaO-Al2O3-ZrO2, and Al2O3-SiO2-ZrO2 systems were obtained by evaluating and assessing the available thermodynamic and phase diagram data. Key phase diagram experiments were conducted to predict and reproduce the experimental data.
CERAMICS INTERNATIONAL
(2022)
Review
Materials Science, Multidisciplinary
Jinfa Liao, Gele Qing, Baojun Zhao
Summary: Due to its advantages of high productivity, high energy efficiency, and low cost, more and larger blast furnaces have been constructed worldwide in recent years. Slag plays an important role in producing high-quality hot metal and maintaining smooth operations in a blast furnace. Extensive research has been conducted on the phase equilibria in the CaO-MgO-Al2O3-SiO2 slag system to meet the changing requirements of blast furnace operations and raw materials. Reliable thermodynamic modelling is the target of researchers to accurately predict liquidus temperatures of the slag.
