Article
Chemistry, Multidisciplinary
Ru Zhang, Quanjing Wang, Qingkui Chen, Aijun Tang, Wenbo Zhao
Summary: Femtosecond laser processing technology shows great potential for preparing micro and nanostructures of single-crystal SiC due to its high precision and non-destructive nature. This study investigates the effects of femtosecond laser ablation on SiC and analyzes the significance of various parameters on groove performance. The results demonstrate that fluence and numerical aperture have significant influence on groove characteristics, while scan speed, repetition rate, and multipass scanning also play notable roles. Experimental methods to increase aspect ratio and reduce heat-affected zone width are explored, and their significance is analyzed. Important factors include fluence, multipass scanning, and z-layer feed.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Ceramics
Ru Zhang, Chuanzhen Huang, Jun Wang, Dongkai Chu, Dun Liu, Shaochuan Feng
Summary: In this study, response surface methodology was used to accurately predict the groove depth, width, heat affected zone (HAZ), and material removal rate (MRR) in SiC femtosecond laser processing. The study found that laser fluence, scan speed, repetition rate, and multipass scanning significantly influenced the processing parameters.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Beidi Chen, Nianyao Chai, Jinyong Zhang, Lin Ren, Weimin Wang, Fan Zhang, Xuewen Wang, Zhengyi Fu
Summary: In this paper, a novel approach to create hierarchical micro-nano surface structures on B4C using femtosecond laser irradiation is proposed. The results show that the phase structure of the sample changes after irradiation, and the wetting performance of the solution on B4C is significantly improved. This work provides a new idea for enhancing the wetting of metal/ceramic systems.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Jia-Xin Zheng, Ming-Rui Guo, Mei-Ling Luan, Bao-Xu Wang, Hua Fan, Ai-Wu Li, Xue-Qing Liu
Summary: In this study, femtosecond laser-assisted inductively coupled plasma etching (ICP) technology is proposed to achieve the efficient fabrication of large-area microlens arrays on the surface of silicon carbide. The SiC microlens arrays can act as an integrated optical homogenizer and beam splitter, demonstrating the broad application prospects of SiC in miniaturized and integrated special optics.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yu Yang, You Zhao, Lukang Wang, Yulong Zhao
Summary: This study presents a new method of using femtosecond laser deep etching to fabricate the sensitive beams and mass blocks of silicon carbide (SiC) accelerometers. By using fillet transitions and optimized laser etching parameters, high-precision machining results can be achieved, improving the processing difficulty.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Electrical & Electronic
Jun He, Jiafeng Wu, Xizhen Xu, Changrui Liao, Shen Liu, Xiaoyu Weng, Liwei Liu, Junle Qu, Yiping Wang
Summary: We present a cylindrical telescope assisted femtosecond laser direct writing technology for fabricating plane-by-plane Bragg gratings in sapphire fibers. The technique allows for the effective extension of the refractive index modulation (RIM) regions and improves spectral characteristics. The resulting sapphire fiber Bragg gratings (SFBGs) exhibit enhanced reflectivity and reduced bandwidth, making them suitable for high temperature measurement applications.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Ranran Fang, Hanlin Zhang, Jiangen Zheng, Rui Li, Xiaofa Wang, Chongfu Luo, Shiyao Yang, Simin Li, Cheng Li, Yijing Chen, Maosen Zhang, Yifu Ye, Anatoliy Y. Vorobyev
Summary: A multifunctional silicon carbide material with efficient wicking and evaporative cooling performances has been created through hierarchical surface nano/microstructuring by a femtosecond laser. The material, which integrates benefits from both micro and nanoscale physics, shows excellent wicking and evaporative cooling functionalities. Its applications include enhancing power generation efficiency, waste heat recovery, and cooling high-heat-flux electronic devices.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
Lukang Wang, You Zhao, Yu Yang, Xing Pang, Le Hao, Yulong Zhao
Summary: This paper introduces a bulk 4H-SiC pressure sensor with controllable diaphragm thickness prepared by femtosecond laser. The sensor exhibits high sensitivity, small errors, and good dynamic response performance. The research demonstrates the potential of employing femtosecond laser technology for preparing SiC pressure sensors for extreme temperature environments.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Yan-Cheng Liang, Yi-En Li, Yi-Hsien Liu, Jia-Fan Kuo, Chung-Wei Cheng, An-Chen Lee
Summary: The laser-induced periodic surface structure (LIPSS) can be induced on the 4H-SiC by femtosecond laser, but there are some problems during the laser process, such as debris dropped on the sample surface. In this study, high-spatial-frequency LIPSS (HSFL) were generated on the 4H-SiC surface using femtosecond laser. Raman spectrum was used to measure HSFL and chemical etching removed the oxidation layer. The results showed a strong correlation between the Raman intensity of amorphous SiC (a-SiC) and the etching rate of HSFL. Additionally, high-quality periodic structures were generated on 4H-SiC after the chemical etching process, with two different morphology observed by transmission electron microscope (TEM).
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Huan Chen, Chaoyang Wei, Zhen Cao, Xiaocong Peng, Zhigang Jiang, Songlin Wan, Jianda Shao
Summary: In order to improve the polishing efficiency of RB-SiC substrates, a simple laser pretreatment process was demonstrated using femtosecond laser to modify the RB-SiC surface pre-coated with silicon powder. The pre-coated surface was oxidized under femtosecond laser irradiation, gradually forming a modified layer that bonded tightly to the RB-SiC substrate. By optimizing the laser scanning parameters, a high-quality modified layer with stronger adhesion strength could be obtained. This approach increased the polishing efficiency over 3 times and can be applied to more complex RB-SiC surfaces.
APPLIED SURFACE SCIENCE
(2023)
Article
Optics
Jianbo Chen, Xiaoxiao Chen, Xuanhua Zhang, Wenwu Zhang
Summary: Silicon carbide ceramics, as a representative high-performance material, have excellent properties and find broad applications in various fields. Laser processing, as a non-contact method, offers great potential for the processing of hard and brittle materials. In this study, laser ablations of silicon carbide ceramics were carried out with different process parameters. The results showed the effect of incidence angle and laser power on the ablation morphology. This work provides technical and theoretical support for laser surface processing with multiple incidence angles, especially for complex curved parts.
OPTICS AND LASERS IN ENGINEERING
(2024)
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
Engineering, Industrial
Junya Hattori, Yusuke Ito, Naohiko Sugita
Summary: In this study, a multi-step drilling method is proposed and demonstrated, which suppresses crack generation in silicon carbide by approximately 70%. This method could be an important option for femtosecond laser microdrilling.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Sahendra P. Sharma, R. Vilar
Summary: Unidirectional carbon fiber-reinforced epoxy matrix composites were treated with femtosecond laser pulses, resulting in laser-induced periodic surface structures on the carbon fiber surface and granular morphology on the epoxy matrix. The difference in ablation depth between the fiber and epoxy was measured and showed significant changes.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Materials Science, Multidisciplinary
James Braun, Cedric Sauder
Summary: The development and availability of a new 3rd generation SiC fiber, Tyranno SA4, show promising potential for processing higher neutron and/or corrosion resistant SiC/SiC composites. Tensile mechanical tests demonstrate that the mechanical properties of SA4 composites are significantly enhanced compared to SA3 composites, with higher failure strain and a solution to the low damage tolerance drawback. Additionally, the influence of pyrocarbon interphase thickness on tensile modulus and proportional limit stress is highlighted, with thinner interphase showing more repeatable mechanical properties and higher proportional limit stress.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Engineering, Mechanical
Yanchao Zhang, Chenguang Si, Yongtao Zhang, Dongya Zhang, Yahui Cui
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2019)
Article
Chemistry, Physical
Zhaoyang Zhai, Chen Wei, Yanchao Zhang, Yahui Cui, Quanren Zeng
APPLIED SURFACE SCIENCE
(2020)
Article
Engineering, Mechanical
Yan-chao Zhang, Ming-hu Yin, Quan-ren Zeng, Ting Wang, Rui Wang
TRIBOLOGY TRANSACTIONS
(2020)
Article
Engineering, Multidisciplinary
Yan-chao Zhang, Ting Wang, Dong-ya Zhang, Ming-hu Yin, Ya-hui Cui, Ling-ping Chen, Peng-fei Du, Rui Wang
MATHEMATICAL PROBLEMS IN ENGINEERING
(2020)
Article
Acoustics
Yanchao Zhang, Jinfu Du, Jin Mao, Min Xu
SHOCK AND VIBRATION
(2020)
Article
Engineering, Mechanical
Zhang Yan-chao, Zhou Rui-min, Yin Ming-hu, Zhang Yong-tao, Hu Hai-tao, Cui Ya-hui
Summary: By conducting performance simulation and friction tests, a suitable friction pair for the finger seal, the C/C-Cr3C2 pair, was identified and proven to be feasible and superior.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Materials Science, Multidisciplinary
Zhaoyang Zhai, Ruihua Zhang, Aofei Tang, Yanchao Zhang, Xian Wang, Yahui Cui
Summary: The femtosecond laser diffraction can fabricate a regular multi-leveled concentric ring structure on the surface of C/SiC composites, allowing for controllable morphology and size by adjusting processing parameters. The spot energy distribution generated by femtosecond laser diffraction is more uniform than that of Gaussian beam, making it suitable for surface polishing of C/SiC composites.
Article
Engineering, Mechanical
Ming-Hu Yin, Yan-Chao Zhang, Rui-Min Zhou, Zhao-Yang Zhai, Jian-Lei Wang, Ya-Hui Cui, De-Shui Li
Summary: The study found that PTFE coating on finger seals improved their friction performance and wear resistance, reducing leakage and wear rates.
TRIBOLOGY TRANSACTIONS
(2022)
Article
Engineering, Mechanical
Lingping Chen, Yanchao Zhang, Yahui Cui, Jie Wang, Mingfeng Wang
Summary: Surface textures have shown great potential in improving lubrication, reducing viscosity, and enhancing wear resistance of friction pairs. The study on finger sealing with inspired by snakeskin textures indicated that aligning texture profile with rotor motion direction can enhance hydrodynamic pressure, and an appropriate texture density between 20% and 40% is recommended for practical applications.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2021)
Article
Thermodynamics
Runlin Chen, Chen Du, Xiaotuan Wang, Yanchao Zhang, Kai Liu
Summary: The study proposed a simulation evaluation method to improve the accuracy of identifying the dynamic characteristics of sliding bearings, and verified the algorithm to enhance the traditional single frequency excitation method. The improved method can reduce the impact of test errors and help improve the accuracy of dynamic characteristics identification.
ADVANCES IN MECHANICAL ENGINEERING
(2021)
Article
Engineering, Mechanical
Lingping Chen, Yanchao Zhang, Yahui Cui, Bowen Zhi, Jie Wang, Mingfeng Wang
Summary: This paper proposes lifting pads with different herringbone groove surface topographies based on the uniform design method, and the numerical analysis and statistical tools reveal that the groove surfaces can significantly improve load-carrying capacity and sealing performance. Reducing groove width or increasing groove internal angle can enhance leakage capacity, and the optimal herringbone groove shows much better sealing performance compared to a general structure.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2021)
Article
Engineering, Electrical & Electronic
Lingping Chen, Yanchao Zhang, Yahui Cui, Jie Wang, Mingfeng Wang
Summary: This paper introduces three texture forms (diamond, ellipse, and hexagon) inspired by snakeskins into the rotor and analyzes their effects on the performance of finger seals. The numerical results show that the textured domain improves the bearing capacity of the fluid film, higher rotation speed or lower pressure difference leads to stronger dynamic pressure effect and better antifriction and wear resistance, a shallow seal clearance and low working temperature are essential for good antifriction and wear resistance, and the ellipse texture outperforms diamond and hexagon textures in terms of friction and wear performance.
Article
Engineering, Electrical & Electronic
Jinfu Du, Liang Hu, Jin Mao, Yanchao Zhang
Summary: By optimizing the tooth surface using a genetic algorithm to minimize the mean value of vibration acceleration, the performance of the high-speed helical gear transmission in battery electric vehicles under full working conditions was improved. Experimental and simulation results demonstrate that tooth surface modification effectively suppresses vibration, with the optimally modified tooth surface under full working conditions showing better vibration reduction effects across the entire working range.
Article
Engineering, Manufacturing
Yanchao Zhang, Minghu Yin, Quanren Zeng, Rui Wang, Tong Zhao
JOURNAL OF ADVANCED MECHANICAL DESIGN SYSTEMS AND MANUFACTURING
(2020)
