Article
Optics
Feng Yang, Zhigang Dong, Renke Kang, Cheng Liu, Dongjiang Wu, Guangyi Ma
Summary: Reaction-bonded silicon carbide composites exhibit a complex ablation mechanism under femtosecond laser irradiation. The ablation threshold decreases with increasing pulse number and stabilizes. Photochemical ablation dominates at low fluence and low pulse number, while photothermal ablation dominates at higher fluence and pulse number. A preliminary model of the ablation mechanism was established based on surface morphology, microstructure, and physical phase analysis.
Article
Nanoscience & Nanotechnology
Baris Yavas, Cain J. Hung, Mingxuan Li, Rainer J. Hebert, S. Pamir Alpay, Mark Aindow
Summary: Laser glazing in a powder bed fusion instrument was used to evaluate the microstructure of an Al85Cu6Fe3Cr6 alloy, revealing the presence of I-phase quasicrystals, Al2Cu, and FCC Al. Laser tracks produced under different conditions showed a fine and uniform phase mixture with over 70% I-phase, a thin film of Al2Cu, and no cracking or macrosegregation. The reasons for the formation of I-phase instead of the previously reported D-phase in this alloy were discussed.
SCRIPTA MATERIALIA
(2023)
Article
Neurosciences
Celia Zhang, Mengxiao Ye, Peter Bush, Bo Hua Hu
Summary: This study used scanning electron microscopy to investigate the ultrastructure of macrophages in different regions of the cochlea and analyzed their phagocytic activities and immune molecule expression. The results showed that basal macrophages exhibited greater phagocytic activities in aging and noise-induced damage. Differences in the expression of immune molecules were also observed between the apical and basal cochlear tissues of young mice. Additionally, the study found that macrophages in the apical and basal regions undergo a transformation in their morphologies as the cochlea ages.
FRONTIERS IN CELLULAR NEUROSCIENCE
(2023)
Article
Chemistry, Physical
Cheng Zhang, Huihui Zhi, Stoichko Antonov, Huaibin Wang, Hao Wang, Yanjing Su
Summary: The effect of hydrogen on the mechanical properties of twinning-induced plasticity austenitic steel was studied using strain rate tests and microscopy. A new method for evaluating hydrogen embrittlement in materials with low hydrogen diffusion coefficient was proposed. The findings suggest that evaluating the contribution of the brittle zone to overall mechanical properties provides a more realistic and universal characterization of the influence of hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Manju Kumari, N. Vijayan, Debabrata Nayak, Kiran, J. S. Tawale, Preetam Singh, R. P. Pant
Summary: A large bulk size single crystal of Potassium Acid Phthalate was successfully harvested using the Sankaranarayanan-Ramasamy method with a (010) oriented seed at the bottom. The quality and optical properties of the crystal were assessed using various techniques such as high-resolution X-ray diffraction and UV-Vis analysis. The surface morphological pattern was thoroughly studied using scanning electron microscopy.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Physical
L. V. Udod, S. S. Aplesnin, M. N. Sitnikov, E. V. Eremin, M. S. Molokeev, A. V. Shabanov, O. B. Romanova, A. M. Kharkov
Summary: A Bi2Fe4O9/BiFeO3 composite with a ratio of 67/33 has been synthesized and characterized. The average crystallite sizes for each phase were determined, and the magnetization hysteresis and disappearance temperature were established. The magnetic phase transitions of each phase were determined using infrared absorption spectra, and the correlation between the composite's structure and magnetic properties was studied.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Multidisciplinary
Mingyang Zhang, Chunming Wang, Gaoyang Mi, Qiubao Ouyang
Summary: This study investigated the fracture characteristics and damage mechanisms of a notorious SiC/2A14Al joint, and found that the sandwich eutectic microstructure inhibited crack propagation and dispersed extra stress. A rapid solidification process strategy was designed to improve the mechanical properties of the joint, and a joint with high tensile strength was successfully prepared.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Composites
U. A. Khashaba, Ismael M. R. Najjar, Khalid Almitani
Summary: In this study, adhesive joints were fabricated using a modified Epocast adhesive system with SiC nanoparticles, and the mechanical properties of the joints were investigated through static tensile and tension-tension fatigue tests. Dynamic parameters were estimated from the analysis of stress-local strain cycles to improve the accuracy of fatigue life prediction for the joints.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Jinhao Jia, Shuxin Bai, Degan Xiong, Qiang Chen, Cong Li, Minqi Gao
Summary: Alloying Al into porous C-f/SiC composite using pressure-infiltration method enhances the bending strength and reduces ablation rates. Transpiration cooling of aluminum alloy and self-sealing protection of ablation products play crucial roles in anti-ablative properties of the composite.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Jiayong Wei, Songmei Yuan, Jiaqi Zhang, Ning Zhou, Wei Zhang, Jiebo Li, Wenzhao An, Mengxuan Gao, Yanzhe Fu
Summary: This paper explores a novel method for underwater femtosecond laser ablation of SiC/SiC composites to obtain high cleanliness, low-oxidation microporous surfaces. The changes in hole depth, material removal rate (MRR), surface morphology, and material components during underwater femtosecond laser ablation are systematically analyzed, and the formation of typical features such as induced cones, small banded pits, fiber debonding and shedding is explained.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Rongjun Liu, Xingyu Liu, Yanfei Wang, Huaming Miao, Changqing Song, Gongjin Qi, Fan Wan
Summary: The C-f/SiC-ZrC ultra-high temperature ceramic matrix composites exposed to high-energy laser ablation exhibited specific ablation region divisions. ZrO2 played a key role in anti-ablation during laser exposure, and dense structure with high melting point components was crucial for improving the anti-laser ablation performance of the materials.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Lingwei Yang, Xueren Xiao, Li Jing, Jun Zhang, Liping Liu, Changhao Zhao, Guolin Wang
Summary: Research shows that SiC fiber reinforced SiC matrix composite undergoes active and passive oxidation in high-temperature and high-pressure plasma environments, leading to severe fiber corrosion. Coating the surface with SiC significantly enhances the ablation resistance of the composite.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Yu Yang, Miao Jiang, Xiaotong Chen, Zhuang Ma, Hanyang Liu, Alexandr. A. Rogachev, Weizhi Tian, Xiaoyu Liu, Zhigang Zhou, Dawei Wang, Lihong Gao
Summary: In this study, a continuous high-energy laser was used to investigate the laser ablation behavior and mechanism of C/SiC composite. The results showed that C/SiC composite exhibits different morphologies when irradiated at different laser power densities. The ablation area was divided into three regions, namely the central, transition, and edge regions, where the formation of SiO2, SiO, and the breakage of carbon fiber were observed. The generated highly reflective SiO2 layer reduces laser energy absorption, leading to lower back-surface temperature and reduced damage of the composite. Additionally, ablation physical models and mechanisms at different power densities were proposed. This work provides a basis for understanding the laser ablation resistance of C/SiC composites under different conditions.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Chemistry, Physical
Rong Ren, Daoping Xiang, Yue Cao, Yuhang Hu
Summary: SiC nanowhiskers were prepared from photovoltaic silicon waste, quartz sand, and coconut fiber, demonstrating a novel, clean, and sustainable method. This approach enables the recycling of valuable resources and high-value utilization of agricultural wastes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yuan Cheng, Yang Lyu, Yongshuai Xie, Chi Zhang, Jiaxin Feng, Liancai Xun, Wengzheng Zhang, Wenbo Han, Shanbao Zhou, Ping Hu, Xinghong Zhang, Jiecai Han
Summary: The ablation behavior and mechanism of ZrC-SiC ceramic matrix, carbon fiber, and ceramic-fiber interface layer under 1800 degrees C ablation are investigated in this study. Chemical reactions and oxidative damage models under 1800 degrees C oxidizing airflow are established, revealing the formation of ZrC and SiC causing grain erosion, and the reaction between carbon fiber and SiO2 and O-2 resulting in pit erosion. The construction of a nanocarbon interface around the fiber is found to inhibit microstructure damage. This work provides fundamental understanding and engineering guidance for the anti-ablation and toughening of 3D C-f/ZrC-SiC.
Review
Chemistry, Multidisciplinary
Bolin Li, Mei Yu, Zesheng Li, Changlin Yu, Hongqiang Wang, Qingyu Li
Summary: This paper proposes a new approach to the design of flexible all-solid-state supercapacitors using advanced 3D printing technology and provides theoretical guidance for their practical applications through the analysis of 3D nanosheets active materials and design methods.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Chemical
Qingyu Li, Wenhao Guo, Hua Li, Zhengbiao Peng, Jingting Liu, Songying Chen, Lu Liu, Lian-Ping Wang, Guichao Wang
Summary: The flow characteristics of gas and non-Newtonian fluid in a rectangular T-microchannel were experimentally studied, and four flow patterns were observed. The effects of various parameters on the flow patterns and Taylor bubble/liquid slug length were compared. Empirical equations were established to predict the Taylor bubble/slug lengths, and the predictions were largely consistent with the experimental results.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Electrochemistry
You-qi Chu, Yan Hu, An-jie Lai, Qi-chang Pan, Feng-hua Zheng, You-guo Huang, Hong-qiang Wang, Qing-yu Li
Summary: To address the rapid capacity fade of Ni-rich cathode during charging and discharging, the researchers synthesized a stable and high capacity retention LiNi0.8Co0.1Mn0.1O2 by one-step co-modification. The co-modification involved S-2 doping and Li2SO4 coating, which consumed impurities and improved the stability of the surface and bulk structures.
ELECTROCHIMICA ACTA
(2022)
Article
Electrochemistry
Qingyu Li, Tong Zhao, Caimei He, Yezheng Cai, Qiang Wu, Youguo Huang, Kui Liu, Zhaoling Ma, Hongqiang Wang
Summary: The designed synthesis of hollow carbon chamber catalysts greatly enhances the electrocatalysis of the oxygen reduction reaction (ORR). The hollow carbon cavities provide a spacious microchemical environment and convenient mass transfer channels, maximizing the amount of active sites and promoting alkaline and neutral ORR. The resulting hollow Mn-NC exhibits superior catalytic capability compared to traditional catalysts, offering significant potential for various energy conversion devices.
ELECTROCHIMICA ACTA
(2022)
Article
Electrochemistry
Youguo Huang, Yiyan Wang, Yanhao Shen, Qichang Pan, Yan Tang, Yezheng Cai, Qingyu Li, Qiang Wu, Zhaoling Ma
Summary: In this study, amorphous electrocatalysts with different crystallization periods were controllably synthesized by adjusting two kinds of organic ligands in the competitive complexation process of coordinating metal ions. These CoO nanoparticles supported on N,P codoped carbon flakes with short-range ordered structure exhibited local defect of positional deviation and different crystallization orientations, and demonstrated superior bifunctional activity for ORR and OER.
ELECTROCHIMICA ACTA
(2022)
Article
Engineering, Manufacturing
Xiaoyu Zhang, Sheng Huang, Dichen Li, Jiale Geng, Fan Yang, Qingyu Li
Summary: This paper compares the effects of laser directed energy deposition (LDED) and hybrid additive manufacturing (HAM) of LDED and shot peening on the microstructure and properties of formed materials. The results show that HAM significantly improves the mechanical properties and optimizes the microstructure of the formed samples.
ADDITIVE MANUFACTURING
(2022)
Article
Energy & Fuels
Bolin Li, Mei Yu, Zesheng Li, Changlin Yu, Qingyu Li, Hongqiang Wang
Summary: In this study, a three-dimensional activated carbon nanosheets modified with graphitized carbon dots (3-D ACNs/GCDs) is proposed as a promising electrode material for supercapacitors. The material shows satisfactory electrochemical performance, high specific capacitance, and good cycle stability.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Electrochemistry
Shenglong Yang, Peng Zhang, Feiyan Lai, Shijie Ling, Youguo Huang, Kui Liu, Fenghua Zheng, Hongqiang Wang, Xiaohui Zhang, Qingyu Li
Summary: This study proposes an efficient and green strategy for the recycling of spent lithium-ion batteries. Through electrochemical precipitation, valuable metals in the batteries can be completely separated and used to regenerate new cathode material.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Lixuan Zhang, Fan Peng, Man Zhang, Dan Li, Qichang Pan, Guanhua Yang, Fenghua Zheng, Youguo Huang, Hongqiang Wang, Qingyu Li
Summary: In this study, a heterostructured binary sulfide nanoparticles coated with N-doped carbon and further wrapped with graphene was synthesized to overcome the volume variation and inferior electrical conductivity of SnS2, making it a promising anode material for both lithium-ion batteries and sodium-ion batteries.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Guangchang Yang, Kai Pan, Zhixiong Yan, Shenglong Yang, Fan Peng, Jingyao Liang, Feiyan Lai, Hongqiang Wang, Xiaohui Zhang, Qingyu Li
Summary: Surface coating is an effective strategy to improve cycling stability of lithium-ion battery electrodes. In this study, a complete coating layer of Mg3B2O6 was prepared on the surface of NCM811 cathode material using a non-traditional route. The coating layer protected the surface crystal structure of the electrode and enhanced the battery's rate capability and cycling performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Fan Peng, Lixuan Zhang, Guangchang Yang, Yahao Li, Qichang Pan, Yu Li, Sijiang Hu, Fenghua Zheng, Hongqiang Wang, Qingyu Li
Summary: This study develops an effective inorganic coating strategy to simultaneously construct a LiNiO2/Na1-xNi1-yPO4 surface hybrid coating layer and Na bulk doping, which effectively improves the high-voltage performance of Ni-rich layered oxide cathode material. The treated cathode material exhibits excellent cycling stability and capacity retention, providing a feasible strategy to enhance the service life, energy density, and safety performance of Li-ion batteries.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yishun Xie, Qingchuang Mu, Feiyan Lai, Guangchang Yang, Huijun Zhang, Shaorong Lu, Zheng Chen, Xiaohui Zhang, Qingyu Li
Summary: Morphology design is an effective strategy for improving the performance of Fe2O3 anode material for lithium-ion batteries. A dendritic Fe2O3 architecture was prepared using a hydrothermal route, with glycine guiding crystal growth and becoming carbon in the final composite. The coralloid Fe2O3/NC composite integrates the advantages of porous and low-dimensional electrode materials, providing more space for ion exchange, better mechanical stability, and improved electron conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Applied
Fan Peng, Youqi Chu, Yu Li, Qichang Pan, Guangchang Yang, Lixuan Zhang, Sijiang Hu, Fenghua Zheng, Hongqiang Wang, Qingyu Li
Summary: The simultaneous construction of a Mg, Ti-based surface integrated layer and bulk doping through Mg, Ti surface treatment can suppress the lattice oxygen evolution and improve the stability and capacity retention of nickel-rich layered cathode materials during high-voltage cycling.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Caimei He, Danling Zhang, Yezheng Cai, Cheng Hou, Xiangsi Wu, Zhaoling Ma, Youguo Huang, Hongqiang Wang, Qingyu Li
Summary: The development of nitrogen-doped cobalt carbide as a bifunctional oxygen electrocatalyst is reported. This electrocatalyst exhibited superior performance in the oxygen reduction and oxygen evolution reactions compared to precious metal catalysts. The rechargeable zinc-air battery driven by this electrocatalyst showed higher power density, specific capacity, and rate performance. The nitrogen-doping strategy was found to enhance the electrocatalytic performance of metal carbides.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Qianqian Li, Man Zhang, Yutong Nong, Qichang Pan, Youguo Huang, Hongqiang Wang, Fenghua Zheng, Qingyu Li
Summary: ZnS@C MRs, with a core-shell structure, were synthesized to address the volume expansion issue of ZnS during lithiation/delithiation process in LIBs. The outer carbon shell not only maintains structural stability by avoiding volume expansion, but also enhances conductivity and inhibits direct contact with electrolyte. As a result, ZnS@C MRs exhibit outstanding electrochemical performance in LIBs, maintaining a capacity of 392 mA h g(-1) after 500 cycles at 1.0 A g(-1) and 162 mA h g(-1) at 3.0 A g(-1).
NEW JOURNAL OF CHEMISTRY
(2022)