Article
Materials Science, Multidisciplinary
Huicong Yang, Pei Tang, Nan Piao, Juan Li, Xuyi Shan, Kaiping Tai, Jun Tan, Hui-Ming Cheng, Feng Li
Summary: This review introduces in-situ imaging techniques used in advanced battery research, detailing their functions and limitations, and advocates for their widespread use to address the existing problems in battery research.
Review
Chemistry, Multidisciplinary
Adam A. L. Michalchuk, Franziska Emmerling
Summary: Mechanochemical transformations offer environmentally friendly routes for synthesis, increasing reaction speed and selectivity. Time-resolved in situ (TRIS) approaches have provided new insights into mechanochemical reactions, revealing new features and advancing our understanding through the combination of complementary techniques.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Materials Science, Ceramics
Jun Li, Huang Shao, Tingting Liu, Kai Zhang, Zhilong Yan, Wenhe Liao
Summary: This paper proposes the preparation of Ti2AlC complex parts through the combination of in-situ selective laser forming (ISLF) and reaction sintering. By studying the impact of scan speed and laser power on the phase composition and microstructure of the formed test specimen, it was found that the test specimen mainly consisted of Ti3Al, TiAl, TiC, and graphite reacted incompletely. The TiC phase developed from nanoparticles to coarse dendritic structures gradually with lower scan speed and higher TiC content.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Wenchao Liu, Lianxi Hu, Jingyuan Shen, Fei Gao, Yu Sun
Summary: The study investigated the reaction mechanism of Al and Si elemental powders, as well as the thermodynamics and dynamics of the reaction process. The liquid phase content increased with reaction temperature and time. The kinetic model accurately predicted the actual liquid phase formation fraction, and increasing reaction temperature decreased the liquid phase viscosity while increasing the Si atom diffusion coefficient to enhance liquid phase formation rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Environmental
Xuexue Wang, Lei Zhang, Kongyun Zhu, Changjing Li, Yulin Zhang, Aimin Li
Summary: The study utilized pressure-assisted sintering method to treat MSWI fly ash, producing high-strength ceramic products with compressive strength significantly higher than conventional construction materials, while heavy metals leaching concentrations were below the standard limit. Increased mechanical properties and decreased heavy metals leaching concentrations were mainly attributed to the increased density and crystalline degree.
Review
Materials Science, Multidisciplinary
Wenchao Liu, Yu Sun, Cheng Deng, Lianxi Hu, Shangjing Yuan, Jingyuan Shen, Fei Gao, Meiyi Ba
Summary: The Orowan strengthening mechanism provided by Cu nanoparticles in Al-6Si-6Cu semi-solid billet is the main strengthening mechanism, accounting for 83% of the total yield strength.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Qi Cai, Qilin Yu, Xinyao Li, Yao Lu, Yanmo Li, Ganggang Cui
Summary: The densification mechanism of Ti-20Al-19Nb alloys was elucidated by in situ observing the surface morphology of Ti/Al/Nb and Ti/TiH2/Al/Nb compacts upon heating. It was found that the densification of the alloy was strongly associated with phase transformations and the addition of TiH2. TiH2 participated in various reactions and reduced the presence of pores, leading to improved density and mechanical properties. This study provides a foundation for the cost-effective fabrication of high-strength Ti-Al alloys containing refractory elements.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Qi Yan, Jinquan Sun, Yanpeng Xue, Guopeng Zhao, Tingting Liu, Xiaohong Liu, Qingkun He, Kun Xie
Summary: High-performance CrN tight ultrafiltration membranes were prepared by in situ gas-solid reaction using Cr2O3 as a nanoprecursor and TiO2 as a nitriding catalyst. The membranes exhibited enhanced hydrophilicity, no cracks or pinholes, high water flux, and retention rates for dyes, with Ti4+ identified as a key factor influencing phase transformation and performance stability.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Physical
Oussama Er-raji, Lina Rustam, Bhushan P. Kore, Stefan W. Glunz, Patricia S. C. Schulze
Summary: The hybrid evaporation/spin-coating technique is widely used for fabricating efficient perovskite silicon tandem solar cells and has potential for scale-up. This work investigates the stages of perovskite formation and their kinetics, and finds that the reaction rate and perovskite quality can be improved by increasing relative humidity. The study also reveals the optimal annealing temperature range and provides insights for reproducible synthesis of high-quality perovskite films.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Ceramics
Xiaofang Wu, Yong Li, Peng Jiang, Jialin Sun
Summary: The study successfully synthesized 15R-Sialon reinforced alumina composite and revealed the synthesis process at high temperatures through investigating the reaction mechanism and material characteristics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Review
Energy & Fuels
Xin Meng, Xueying Tian, Shasha Zhang, Jing Zhou, Yiqiang Zhang, Zonghao Liu, Wei Chen
Summary: This review summarizes the progress in in situ characterization for understanding the degradation of organic-inorganic hybrid perovskite solar cells (PSCs). It discusses the impact of different environmental factors on the degradation of perovskites and PSCs, and highlights the importance of in situ diagnostic techniques in tracking the real-time changes during the degradation process. The review provides insights into the stability issues of PSCs and offers future perspectives for in situ characterization.
Article
Nanoscience & Nanotechnology
Yue Cao, Guo-Cheng Xu, Lin Li, Hai-Rong Mao, Rui-Fen Guo, Ping Shen
Summary: Flash sintering and in situ joining of 3YSZ with metal were achieved under an electric field, leading to rapid densification. However, defects were present in the joints due to the application of a single AC or DC field. Electric field-induced Joule heating and internal electrochemical reaction were the key mechanisms for the sintering process.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Roman Schuster, Andreas Keplinger, Aurelie Jacob, Johannes Kreyca, Laszlo Solyom, Emad Maawad, Erwin Povoden-Karadeniz
Summary: The precipitation kinetics and formation mechanisms of sigma phase in a hyper duplex stainless steel were studied during isothermal holding in the temperature range of 750°C to 1025°C. In-situ high energy X-ray diffraction experiments and Rietveld analysis revealed the nose temperature as 900°C, where the sigma phase fraction reached 1 wt% after 15 s. The transformation from interface controlled nucleation to diffusion controlled growth occurred after the sigma phase fraction reached half its final value at 1000°C.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Satoshi Tominaka, Izuru Karimata, Takahide Matsuoka, Moeri Sakamoto, Takahito Nakajima, Koji Ohara, Takashi Tachikawa
Summary: The study reveals the photoluminescence red-shift phenomenon in organic-inorganic hybrid halide perovskite materials under illumination, leading to performance loss due to light-induced halide segregation. Experimental results show that defect-assisted photoinduced transition from nonpolar to polar phases at the local scale in mixed-halide perovskites, coupled with organic cation reorientation, results in bandgap narrowing.
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Physical
Liangping Xiao, Guanghua Wang, Xingchen Huang, Shiyuan Zhou, Rusen Zhou, Youhong Jiang, Sangui Liu, Gen Li, Haimei Zheng, Shi-Gang Sun, Hong-Gang Liao
Summary: The nanoscale transformation processes of MOFs derivatives were directly observed using in-situ liquid phase TEM, revealing the unexpected nanobubble stability controlled mechanism of ZIF-67 transition to Co-TMH. This study provides new insights and methods for the synthesis and catalytic performance of porous Co-TMH.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Materials Science, Multidisciplinary
Edson Kugara Chiwandika, Sung-Mo Jung
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2020)
Article
Geochemistry & Geophysics
Edson K. Chiwandika, Seong-Kyu Cho, Sung-Mo Jung
Article
Metallurgy & Metallurgical Engineering
Edson Kugara Chiwandika, Jinbi Bok, Sung-Mo Jung
Summary: The study found that the addition of MgO in the sintering of hematite-ilmenite ores resulted in increased formation of MgO·Fe2O3 and Mg-rich SFCA, as well as higher retention of Ti in the Fe-rich phase. However, the formation of CaO·TiO2·SiO2 phase decreased with increasing MgO addition.
ISIJ INTERNATIONAL
(2021)
Article
Green & Sustainable Science & Technology
Dali Hariswijaya, Leonardo Tomas Da Rocha, Edson Kugara Chiwandika, Sung-Mo Jung
Summary: Alumina plays a significant role in the formation of SFCA in iron ore sinter, promoting its formation while also affecting the porosity and viscosity of the sintered ore, thereby impacting its physical properties.
JOURNAL OF SUSTAINABLE METALLURGY
(2022)
Article
Green & Sustainable Science & Technology
Edson Kugara Chiwandika, Sung-Mo Jung
Summary: Due to the increase in global steel production and the depletion of high-grade ore resources, it is necessary to investigate the use of low-grade ores containing arsenic. This experiment thermodynamically investigated the volatilization of arsenic from hematite ore at high temperatures and found that arsenic remained relatively stable even at elevated temperatures, and reacted with other metallic elements.
JOURNAL OF SUSTAINABLE METALLURGY
(2022)
Article
Materials Science, Multidisciplinary
Edson Kugara Chiwandika, Sung-Mo Jung
Summary: The study investigated the behavior of phosphorus distribution in iron ore pellets reduced by CO-H-2 gas mixtures. The reduction rate increased with an increase in H-2 content, with the highest rate observed when 100% H-2 was used. Phosphorus was found to be concentrated in the slag when a mixture of 50% CO-50% H-2 was used, increasing the possibility of dephosphorization by magnetic separation. The activation energies were evaluated to be 20.8-50.2 kJ/mol depending on the gas composition.