Article
Materials Science, Multidisciplinary
Jiayong Wei, Songmei Yuan, Jiaqi Zhang, Ning Zhou, Wei Zhang, Jiebo Li, Wenzhao An, Mengxuan Gao, Yanzhe Fu
Summary: This study investigated the ablation behavior and mechanisms of SiC/SiC composites in different environments, demonstrating thermochemical corrosion dominance in air and a combination of thermomechanical denudation and thermochemical corrosion in water.
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
Materials Science, Multidisciplinary
Ning Zhou, Songmei Yuan, Mengxuan Gao, Wei Zhang, Jiaqi Zhang, Tianrui Hu
Summary: SiC/SiC composites are promising materials for high-temperature components in aerospace applications. This study investigated the behavior of multi-pulse femtosecond laser ablation of SiC/SiC composites and determined the oxidation and removal mechanism of these materials.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Composites
Zhaoxuan Yan, Qingyan Lin, Guoji Li, Yong Zhang, Wenjun Wang, Xuesong Mei
Summary: This study reports a new ultrafast laser polishing method for SiC/SiC composites and discusses the influence of different incident angles in detail. The results show that as the incident angle increases, the polishing quality of SiC/SiC composites is significantly improved.
JOURNAL OF COMPOSITE MATERIALS
(2021)
Article
Materials Science, Ceramics
Jie Chen, Qinglong An, Weiwei Ming, Ming Chen
Summary: The study investigated the laser-induced ablation mechanism and products of SiCf/SiC composites through numerical simulation and experiments, finding that the ablation depth could be controlled by adjusting laser parameters, with continuous-wave (CW) mode resulting in greater depth. Adjusting the scanning speed and spacing were significant factors in controlling the depth of laser-induced ablation.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Jing Xu, Lingjun Guo, Jingan Kong, Yuan Ma, Hanhui Wang, Jiancheng Wang
Summary: The bending property of C/C-ZrC-SiC, C/C-SiC, and C/C composites after ablation was studied, and it was found that C/C-ZrC-SiC composites exhibited better laser ablation resistance and higher bending strength retention compared to the other two. The excellent ablation resistance and residual bending strength of C/C-ZrC-SiC composites were attributed to the lowest ablative temperature and the effective protection of ZrO2 grain and ZrO2-SiO2 layer. However, the ablation damage induced a fracture behavior transformation in the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
John Linden, Neta Melech, Igor Sakaev, Ofer Fogel, Slava Krylov, David Nuttman, Zeev Zalevsky, Marina Sirota
Summary: This article presents a novel technology for precise fabrication of quartz resonators for MEMS applications. The approach is based on laser-induced chemical etching of quartz. The main steps include UV laser treatment of a Cr-Au-coated quartz wafer and wet etching. The fabricated devices show reduced surface roughness and improved wall profiles.
MICROSYSTEMS & NANOENGINEERING
(2023)
Article
Optics
Zhaoyang Zhai, Ningqiang Wu, Zhilong Wang, Yanfei Zhang, Danlong Song, Yahui Cui
Summary: The preparation of laser-induced graphene (LIG) coating on the surface of silicon carbide fiber reinforced silicon carbide (SiC/SiC) composites was conducted using high-repetition frequency femtosecond laser pulses with phenolic resin as a carbon precursor. The morphology, structure, and properties of the LIG coating can be adjusted by altering the laser scanning speed. At a scanning speed of 200 mm/s, the LIG displayed the highest quality with a gauze-like fold of planar structure and good light transmittance, showcasing excellent thermal stability with a mass retention rate of over 85% at 800 degrees C.
Article
Materials Science, Ceramics
Yong Gao, Bai-Lin Zha, Jin-Jin Wang, Zhen-Sheng Sun, Zhao-Fu Zhang, Yi-Ang Shi
Summary: In this study, C/C-SiC and C/C-SiC-ZrC composites were prepared and their ablation resistance under hypersonic oxygen-rich environmental conditions was investigated. The results showed that C/C-SiC composites exhibited excellent ablation resistance at relatively low temperature and speed, while the high-temperature ablation resistance of ZrC-modified C/C-SiC-ZrC composites significantly improved.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Tingkai Yang, Changhua Liu, Tao Chen, Meng Shao, Chun Jiang, Changzheng Lu, Shijun Song
Summary: Reaction-bonded silicon carbide (RB-SiC) is a promising material for large lightweight ground-based space telescopes due to its superior mechanical properties. This study proposes a femtosecond laser-based polishing method for RB-SiC to enhance surface quality. The feasibility of femtosecond laser polishing is verified through the analysis of ablation types and calculation of the single-pulse ablation threshold. By conducting experiments and selecting optimal parameters, the polishing efficiency is improved, potentially replacing intermediate steps of traditional mechanical polishing.
Article
Materials Science, Ceramics
Qingzhen Zheng, Xuesong Mei, Gedong Jiang, Jianlei Cui, Zhengjie Fan, Wenjun Wang, Zhaoxuan Yan, Hang Guo, Aifei Pan
Summary: This paper proposes a novel ultrasonic vibration-assisted femtosecond laser polishing method for C/SiC composites. The near-field convection enhancement of ultrasonic vibration improves cooling and reduces bonding of ablated particles to the material surface, resulting in reduced oxidation, improved surface quality, removal depth, and material removal rate. By optimizing defocusing distance and scanning speed, a specific relationship between ultrasonic amplitude, pulse energy density, and spot overlap rate was established, achieving a smooth and defect-free surface. The coupling effect of ultrasonic and laser energy fields enhances the residual compressive stress of carbon fibers, explaining the formation of typical features such as fiber fracture and pulling-out, banded pits, voids, and deposition. This paper presents new research ideas for understanding the removal mechanism of C/SiC composites using ultrasonic vibration-assisted femtosecond laser.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Han-Hui Wang, Jing-An Kong, Min Xu, Peng-Fei Zhang, Li Yang, Xiao-Hong Shi, He-Jun Li
Summary: The SiO2-Nd2O3/Si-SiC-MoSi2 coating was proposed to repair damaged SiC coated C/C composites by laser cladding. Results showed that the coating effectively improved the laser ablation resistance of the specimens by reducing the maximum temperature and promoting the growth of ablative products.
Article
Optics
Bing Dong, Zongwei Xu, Changkun Shi, Kun Zhang, Yuheng Zhang, Rushuai Hua, Wei Zhao, Jianshi Wang
Summary: In this study, a method for fabricating high-quality micro-nanostructures of 4H-SiC using vector polarized light was proposed. The influences of linear polarization and vector polarization on the quality and surface morphology of processed SiC microgrooves were studied. The study showed that using vector beam, especially azimuthal polarization beam, can ensure the uniformity of the processing area, reduce micro-cracks and obtain better processing quality.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Lukang Wang, You Zhao, Yu Yang, Manman Zhang, Yulong Zhao
Summary: This study investigates the effects of processing parameters on the results of femtosecond laser ablation of SiC material, providing insights for achieving precise, controllable, and high-quality machining of SiC using infrared femtosecond laser.
Article
Materials Science, Multidisciplinary
Zhe Wang, Jiangtao Wang, Hongwei Song, Wu Yuan, Yuwen Liu, Te Ma, Chenguang Huang
Summary: The laser ablation behaviors of C/SiC composites were studied in a hypersonic wind tunnel and compared to tests conducted under static air. The mass ablation rates increased by 4 to 9 times under hypersonic airflow, with significant differences in ablation morphologies observed. The accelerated ablation rate and distinctive ablation micro-morphologies were mainly attributed to strong mechanical erosion induced by the hypersonic airflow.
Article
Engineering, Mechanical
Yali Ma, Cancan Li, Jiayong Wei
Summary: This paper presents an analytical model for the static stiffness of linear rolling guideway, considering the structural deformations of the carriage. The model was validated by comparing calculated deformations with those from a commercial program and experimental results, showing a better match between the proposed model and the measurements.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Mechanical
Jiayong Wei, Cancan Li, Yali Ma
Summary: This study establishes static precise finite element models of single ball-raceway and rolling linear guide (RLG), and explores the maximum contact stress and deformation of RLG under specific preload values, comparing the overall and unit slice finite element models. The research also investigates the mapping laws between external load, preload value, curvature ratio, carriage's wall thickness, guide's width, and static mechanical properties of RLG, providing a new approach to high-efficiency and high-rigidity design of RLG.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Physical
Jiao Wen, Jiebo Li, Jian He, Yu Chen, Xin Yan, Qian Guo, Qijie Zhou, Liangliang Wei, Jingyong Sun, Hongbo Guo
Summary: This study investigates the structural evolution of Pt films on different substrates at high temperatures using molecular dynamics simulations and 2D-GIWAXS. The results show that the substrate materials and annealing temperatures have significant effects on the crystallization and evolution of Pt films, providing a design guide for the fabrication and application of devices.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Dan Wang, Jiebo Li, Yanan Wang, Fu Liu, Guantao Wang, Xilun Ding, Sida Luo, Geng Chen
Summary: This study systematically investigates the antibacterial activities of laser-induced graphene and identifies the interconnected open-cell network with the highest specific surface area as the determining factor for bacteria trapping.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Ceramics
Jiaqi Zhang, Songmei Yuan, Jiayong Wei, Jiebo Li, Zikang Zhang, Wei Zhang, Ning Zhou
Summary: This study investigates the effects of laser power and assist gas type on the material removal, hole morphology, and efficiency in millisecond laser processing of SiCf/SiC. Through multi-scale observation and simulation models, the study provides insights for guiding the processing of parts in the aerospace and nuclear industries.
CERAMICS INTERNATIONAL
(2022)
Article
Optics
Weiliang Zhao, Guanglei Zhang, Jiebo Li
Summary: Evaluating the stress field using photoelasticity is crucial in engineering fields. Developing a deep learning method to simplify and accelerate the image acquisition and processing process is essential for efficient demodulation of stress distribution. The proposed framework improves prediction accuracy by employing Resnet as the backbone, applying the U-Net architecture, and adding a physical constraint module. The model performs well under different conditions, demonstrating its universality and effectiveness in stress detection.
Article
Materials Science, Multidisciplinary
Jiayong Wei, Songmei Yuan, Jiaqi Zhang, Ning Zhou, Wei Zhang, Jiebo Li, Wenzhao An, Mengxuan Gao, Yanzhe Fu
Summary: This study investigated the ablation behavior and mechanisms of SiC/SiC composites in different environments, demonstrating thermochemical corrosion dominance in air and a combination of thermomechanical denudation and thermochemical corrosion in water.
Article
Chemistry, Multidisciplinary
Bingwei Wang, Miao Zhao, Zhijie Su, Baohua Jin, Xiaoning Yang, Chenyu Zhang, Bingbing Guo, Jiebo Li, Weili Hong, Jiarui Liu, Yun Zhao, Yujia Hou, Futing Lai, Wei Zhang, Lihua Qin, Weiguang Zhang, Jianyuan Luo, Ruimao Zheng
Summary: The RII beta subunit of cAMP-dependent protein kinase A (PKA) is expressed in the brain and adipose tissue. RII beta-knockout mice show leanness and increased UCP1 in brown adipose tissue. RII beta reexpression in hypothalamic GABAergic neurons rescues the leanness. The authors investigate the role of RII beta-PKA in white adipose tissue (WAT) browning and find that RII beta-KO mice exhibit robust WAT browning. They also demonstrate that RII beta-PKA in dorsal median hypothalamic GABAergic neurons regulates WAT browning and affects body weight. Targeting RII beta-PKA in DMH GABAergic neurons may have therapeutic potential for obesity and metabolic disorders.
Article
Materials Science, Ceramics
Dan Zhao, Yi Feng, Zhipeng Pi, Fan Zhang
Summary: Phase equilibria in the ZrO2-GdO1.5-TaO2.5 (ZGTO) system were experimentally investigated, and the differences between ZGTO and the existing ZrO2-YO1.5-TaO2.5 (ZYTO) were discussed. The study is useful for thermodynamic assessment of ZGTO and can guide the design of novel thermal barrier coatings materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yutaka Ohya, Wingki Mey Hendra, Chika Takai-Yamashita, Takayuki Ban
Summary: Diffusion couples of rutile and corundum single crystals were prepared and examined to study the solid solution and precipitation of corundum in rutile during cooling. Different precipitation forms of corundum were observed under different cooling conditions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiaming Zhan, Yunfa Guo, Hao Wang
Summary: This study systematically investigates the mechanical behaviors of calcium fluoride in humid environments. The effects of water on the deformation and plastic enhancement of CaF2 under indentation are explored through microindentation experiments, atomic simulations, and Raman spectroscopy measurement.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hangfeng Zhang, Henry Giddens, Theo Graves Saunders, Matteo Palma, Isaac Abrahams, Haixue Yan, Yang Hao
Summary: The relationship between low and high frequency tunabilities in tin substituted barium titanate ceramics was investigated. It was found that there are differences in tunabilities at different frequencies due to the different activities of larger ferroelectric domains and polar nanoclusters.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Kaibiao Xi, Jiacheng Liu, Beibei Song, Huarong Cheng, Yihao Li, Xiaole Yu, Mupeng Zheng, Mankang Zhu, Yudong Hou
Summary: Composite modulation in the superparaelectric state of the BTBZ-CT system is proposed as an effective strategy to achieve both NTCC and excellent energy storage performance in dielectric ceramics. The addition of BZ and CT to BT ferroelectrics can move the SPE state to the normal use temperature zone, resulting in enhanced NTCC characteristics and energy storage performance. Furthermore, intentional precipitation of CT at grain boundaries can refine the grain size, increase the bandgap, and strengthen the local electric field distribution, thereby enhancing the breakdown electric field.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hamed Salimkhani, Lovro Fulanovic, Till Froemling
Summary: The demand for robust multilayer ceramic capacitors with high-temperature and high-power capabilities is increasing rapidly. However, cost-effective production is a challenge. This study investigates the use of Na0.5Bi0.5TiO3-based materials as promising lead-free options. By adding sintering aids, the sintering temperature of Na0.5Bi0.5TiO3-BaTiO3-CaZrO3-BiAlO3 solid solutions was successfully reduced to 975 degrees C, suitable for co-sintering with Cu electrodes without adverse effects on capacitor properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Mingxing Li, Ran Mo, Zeshui Xu, Jie Zhou, Conglin Zhang, Xuefeng Cui, Fang Ye, Laifei Cheng, Ralf Riedel
Summary: Polymer infiltration and pyrolysis is an effective method for preparing ceramic matrix composites. The transformation of polymer to ceramic during the process affects the residual stress and interface behavior in the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yan Kang, Lin Chen, Chang-Jiu Li, Guan-Jun Yang
Summary: A novel abradable seal coating with low hardness and high bonding strength was successfully designed and prepared. This coating has significantly higher abradability and erosion resistance compared to metal-based coatings, and can retain excellent abradability and have a long lifetime during service.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Qingzhong Song, Xiangdong Zha, Ming Gao, Yingche Ma
Summary: This study analyzes the influence of calcia refractory purity on the properties of calcia crucibles. Higher purity calcia results in well-developed grains and improved hydration resistance, leading to better high-temperature strength and thermal shock resistance. In contrast, lower purity calcia crucibles exhibit inferior properties. Therefore, high-purity calcia is considered a potential refractory for manufacturing oxide crucibles.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sehreish Abrar, Faisal Nazeer, Zhuang Ma, Ling Liu, Abdul Malik, Mustafa Kamal, Abdullah G. Al-Sehemi
Summary: To raise the operating temperature of Si-based ceramic matrix composites (CMCs), researchers have applied thermal/environmental barrier coating (T/EBCs) materials, typically rare earth silicates. However, the high thermal conductivity and the mismatch of thermal expansion have been major challenges in developing new materials that can offer thermal insulation and environmental protection to CMCs. In this study, entropy engineering was used to create a multicomponent equi-atomic single-phase pyro silicate with extremely low thermal conductivity and enhanced water vapor corrosion resistance. The research findings show the potential of high entropy disilicates in achieving ultra-low thermal conductivity and low weight loss in corrosive environments.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zi-bo Niu, Daxin Li, Dechang Jia, Zhihua Yang, Kunpeng Lin, Paolo Colombo, Ralf Riedel, Yu Zhou
Summary: In this study, SiBCN ceramics with a special structure were prepared to improve the oxidation resistance. The effect of the structure on oxidation behavior and kinetics was investigated, revealing that the special structure can effectively inhibit heterogeneous oxidation and enhance the oxide layer composition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Melike Donmez, Metehan Erdogan, Cihangir Duran
Summary: The limited densification of CeO2 ceramics was improved by using an anorthite-based glass, resulting in high dielectric constant and quality factor with minimum dielectric loss. The CeO2-(anorthite-based) glass ceramic showed promising results in terms of low temperature densification and microwave properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
S. Rahmati, R. G. A. Veiga, J. Mostaghimi, T. Coyle, A. Dolatabadi
Summary: This study provides an atomic-scale description of the high-velocity impact of alpha-Al2O3 particles onto an alpha-Al2O3 substrate during Aerosol Deposition (AD). The results suggest that the crystal orientation plays a crucial role in both plasticity and damage of the nanoparticles. Impact velocity has a direct correlation with plasticity and fragmentation, but adhesion efficiency has only a marginal increase. The crucial element lies in the substrate's surface alterations caused by the fragments left on the substrate after impact.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Bo-Wen Chen, Yan-Mei Kan, De-Wei Ni, Chun-Jing Liao, Hong-Da Wang, Yu-Sheng Ding, Shao-Ming Dong
Summary: This study characterized the long-term and repeated ablation properties of modified Cf/HfC-SiC composites with YB4-Al2O3-Si3N4 under an air plasma torch. The structural stability and viscosity of the oxide layer were found to affect the ablation resistance of the composites. By forming nano c-HfO2 grains and high-viscosity Al-Si-Y-O glassy phase, the structural stability of the oxide layer was improved, resulting in enhanced ablation resistance. However, the oxidation of Si3N4 led to the formation of NO, NO2, and excessive SiO2 glassy phase, which resulted in a porous structure and reduced the viscosity of the oxide layer. Therefore, the addition of Si3N4 decreased the ablation resistance of the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yongxing Wei, Huawei Zhang, Siyuan Dong, Changqing Jin, Chenxing Bai, Junle Dai, Zengzhe Xi, Zhonghua Dai, Zengyun Jian, Li Jin
Summary: In this study, solid solutions of xBi(Ni1/2Hf1/2)O-3-(1 - x)PbTiO3 (xBNH-PT) were synthesized to investigate their phase boundary behaviors and physical properties. The presence of a tetragonal-pseudocubic phase boundary and a spontaneous ferroelectric-relaxor transition at specific compositions were confirmed. The introduction of a tetragonal-pseudocubic phase boundary improved the piezoelectric properties and suppressed the spontaneous ferroelectric-relaxor transition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
