Article
Chemistry, Physical
Qiufa Luo, Jing Lu, Zige Tian, Feng Jiang
Summary: In this study, the interaction between diamond abrasives and the 6H-SiC wafer surface during ultra-precision polishing was analyzed through experiments and molecular dynamics simulations. It was found that controlling material removal uniformity and restricting abrasive cutting depth to tens of nanometers or less can achieve a smooth, scratch-free and almost damage-free wafer surface. These findings provide insights into the importance of controlling material removal uniformity in nanoscale manufacturing processes.
APPLIED SURFACE SCIENCE
(2021)
Article
Automation & Control Systems
Limin Zhang, Weixing Li, Mingming Lu, Jieqiong Lin, Yuyang Liu, Changqing Liu
Summary: A new material removal rate (MRR) model is established in this paper to investigate the removal mechanism of fused silica glass. The model considers the influence of average load and magnetic interaction force based on fluid mechanics and Preston's equation. A suite of experiments is conducted to validate the validity of the MRR model, and the experimental results are highly consistent with the model results.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Lin Zhang, Chunlei Zhang, Wei Fan
Summary: This study reveals the influence of robotic normal positioning error on the MRF removal rate, and presents a force-controlled end-effector for robotic MRF process to enhance stability and efficiency.
APPLIED SCIENCES-BASEL
(2022)
Article
Automation & Control Systems
Zhen Ma, Yebing Tian, Cheng Qian, Shadab Ahmad, Zenghua Fan, Zhiguang Sun
Summary: Previous studies have demonstrated that magnetorheological shear thickening polishing (MRSTP) can achieve nano-level surface quality. This research aims to investigate the numerical simulation and material removal characteristics during the MRSTP process. A magnetic field generation apparatus was designed and developed, and the model of magnetic field distribution was imported into a computational fluid dynamics (CFD) module to create the desired polishing environment. Through CFD simulation, the polishing stress behaviors were analyzed based on various parameters. The results showed that the pressure on the workpiece surface decreased with the increase of rotational speed but increased with the flow velocity of MRSTP media.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Tan-Tai Do, Te-Hua Fang
Summary: This study employed molecular dynamics simulations to investigate the substrate removal methods in beta-SiC polishing. The vibration-coupled rolling motion was found to be the most effective, while the sliding motion showed significant improvement in atom removal. Additionally, increasing the number of asperities and the amplitude of vibration led to improved surface roughness.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Mingshuo Kang, Yan Gu, Jieqiong Lin, Xiaoqin Zhou, Sen Zhang, Huibo Zhao, Zhen Li, Bingjin Yu, Bin Fu
Summary: This study aims to research the material removal mechanism of non-resonant vibration-assisted magnetorheological finishing (NVMRF) of SiC ceramics for improving their surface quality and finishing efficiency. A theoretical model of the polishing forces considering the vibration was proposed, and a theoretical model of material removal rate (MRR) based on the Preston equation was proposed for quantitative analysis. Furthermore, a theoretical model and the smoothed-particle hydrodynamics (SPH) simulation of a single diamond abrasive were proposed to explain the reasons for the increase in the MRR. Combined with designed processing experiments, introducing the vibration can enhance the normal force and total shear force, leading to improvement in the MRR, surface quality, and subsurface damage (SSD).
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Engineering, Manufacturing
Jinhuan Xu, Jianyong Li, Meng Nie, Yueming Liu
Summary: The material removal process of magnetorheological foam plane finishing (MRFPF) method considering various processing conditions was investigated. A material removal rate (MRR) model based on the updating type of workpiece moving trajectory, magnetic field distribution, and polishing speed in the polishing area was established. The MRR is generated by integrating the polishing pressure and speed over the time that polishing pressure on the workpiece updating for 1 cycle, with a relative error between theoretical and experimental results less than 11.63%. Moreover, MRFPF can achieve much higher MRR and surface flatness improvement rate than that of magnetorheological finishing (MRF) under different processing conditions, indicating the effectiveness of MRFPF in planar finishing.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Automation & Control Systems
Yan Gu, Bin Fu, Jieqiong Lin, Xiuyuan Chen, Weidong Zhou, Bingjin Yu, Huibo Zhao, Zhen Li, Zisu Xu
Summary: This paper proposes a wheel-type vibration-magnetorheological compound finishing technique to reduce the unidirectional scratch caused by the wheel-type magnetorheological finishing tool and improve the convergence rate of surface roughness.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Rensheng Wang, Shichao Xiu, Cong Sun, Shanshan Li, Xiangna Kong
Summary: A new reciprocating magnetorheological polishing (RMRP) method for flat workpieces was proposed in this study. It was found that the rotational speed of the workpiece had a greater impact on material removal rate (MRR) compared to the eccentric wheel speed and eccentricity. The experimental results validated the MRR model and showed significant improvement in surface roughness under specific technical parameters.
Article
Materials Science, Ceramics
Qikai Li, Xiaoyuan Li, Zuoyan Ye, Lili Wang, Jinlong Pan, Yunfei Zhang, Minheng Ye, Chao Wang
Summary: This study investigates the impact of nanodiamond abrasive agglomeration on the material removal rate in magnetorheological finishing (MRF) through both experimental and molecular dynamic simulation (MDS) approaches. A novel active abrasive contact sites model is proposed to simulate the material removal rate, showing good agreement with experimental results. This work provides insights into controlled nanoscale material removal and atomic adhesion friction mechanism in MRF.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Optics
Zhifan Lin, Hao Hu, Yifan Dai, Zhong Yaoyu, Shuai Xue
Summary: This paper developed a theoretical model to describe the material removal rate and surface quality after Magnetorheological finishing (MRF) in order to better understand the material removal mechanism. Experimental results were highly consistent with the theoretical model calculated results, making the theoretical model a reference for high-efficiency and ultra-smooth MRF process.
Article
Automation & Control Systems
Le Nam Quoc Huy, Le Ngoc Quynh Hoa, Chao-Chang A. Chen
Summary: This study investigates the challenges of copper CMP technique and develops a three-dimensional microstructural model for polishing pads. It also introduces a new calibration method for material removal rates. The findings provide valuable insights for developing CMP process models and advanced applications.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Engineering, Mechanical
Mayank Srivastava, Pulak M. Pandey
Summary: A novel hybrid finishing process that combines chemical-mechanical polishing (CMP) and magneto-rheological finishing (MRF) was used to improve the surface quality of monocrystalline silicon wafers. Experimental results and statistical analysis indicated that the major factors influencing polishing effectiveness were the percentage CIP concentration and working gap.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2021)
Article
Engineering, Mechanical
Du Xu, Tete Hu
Summary: This paper presents a magnetorheological-based polishing tool and vibration control method to improve stability and reduce vibration during machining, thereby improving the machining quality. Firstly, a polishing end-effector with MR-based damper and magnetic spring mechanism is designed, and the vibration characteristics are theoretically analyzed. Multi-objective optimization is performed to minimize the maximum frequency response value of the polishing system. Then, a disturbance observer is designed to estimate the nonlinear cutting force, and a vibration controller based on polishing force with gravity compensation is proposed to maintain normal contact force and reduce vibration.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Automation & Control Systems
Peng Zhang, Jingfang Yang, Huadong Qiu
Summary: A mechanical polishing model for silicon carbide substrates was established, optimizing material removal rate parameters and providing a key guarantee for the next CMP process through surface quality observation and characterization. The importance of MRR for ultra-smooth polishing was confirmed, providing assurance for the application of semiconductor equipment and technology.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Chemistry, Applied
Guanzheng Wu, Siming Li, Jiayu Hu, Manchen Dong, Ke Dong, Xiuliang Hou, Xueliang Xiao
Summary: This study explored the working principle of a capacitive pressure sensor and prepared a high sensitivity sensor by overlaying carbon fibers (CFs) on the surfaces of the thermoplastic elastomer (TPE). The sensor with excellent mechanical properties and electrical conductivity showed outstanding sensing stability under 10% applied strains.
PIGMENT & RESIN TECHNOLOGY
(2021)
Article
Mechanics
Ke Dong, Liangqiang Liu, Xiayan Huang, Xueliang Xiao
COMPOSITE STRUCTURES
(2020)
Article
Biochemistry & Molecular Biology
Yanting Han, Yuanzhang Jiang, Jinlian Hu
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2020)
Article
Chemistry, Multidisciplinary
Wang Chen, Mengli Hu, Junyu Zong, Xuedong Xie, Qinghao Meng, Fan Yu, Li Wang, Wei Ren, Aixi Chen, Gan Liu, Xiaoxiang Xi, Fang-Sen Li, Jian Sun, Junwei Liu, Yi Zhang
Summary: Inspired by enhanced interface interactions, this study found that the 1T' phase of WSe2 may be more stable than the 2H phase. By growing WSe2 monolayers on SrTiO3 (100) substrate, a 100% single 1T' phase was achieved. In-plane compressive strain at the interface drove the 1T'-WSe2 into a semimetallic phase.
ADVANCED MATERIALS
(2021)
Article
Biochemical Research Methods
Ming Zeng, Xiaonei Zhang, Chunyu Zhao, Xiangzhe Lu, Qinghao Meng
Summary: The proposed GRP-DNet classification system shows outstanding performance in accurately identifying seizures and epilepsy from single-channel, long-term EEG signals. With a classification accuracy of 100% in all six classification experiments and excellent computational efficiency, GRP-DNet demonstrates tremendous potential for developing an EEG-based online epilepsy diagnosis system and outperforms existing competitive classification systems in the same database.
JOURNAL OF NEUROSCIENCE METHODS
(2021)
Article
Polymer Science
Yuanchi Zhang, Jinlian Hu
Summary: This study modified graphene oxide and incorporated it into a nanocomposite of polyurethane and tourmaline, resulting in fibers with improved mechanical properties and negative ion releasing performance. The fibers released significantly more negative ions and showed a significant decrease after applying voltage.
Article
Nanoscience & Nanotechnology
Mohammad Irfan Iqbal, Fengxin Sun, Bin Fei, Qingyou Xia, Xin Wang, Jinlian Hu
Summary: The study indicates that water-actuated woolen knitwear has great potential in smart textile production, with fabric structure playing a crucial role in water actuation and clothing cooling performance. Unbalanced knit structures prepared using water-responsive descaled wool fibers can enhance the thermal management abilities of single jersey. This material may find wide applications in fields like thermoregulation, functional clothing, sportswear, and medical care.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Multidisciplinary
Jia-Ying Wang, Qing-Hao Meng, Xing-Wei Jin, Zhe-Hua Sun
Summary: This study proposed seven design schemes of handheld e-nose bionic chamber for liquor recognition, inspired by the structural characteristics of mammalian nasal cavity. Through fluid dynamics simulation, the selected bionic chamber was found to have higher recognition rate in identification experiments of six liquors when compared with an ordinary square gas chamber.
Article
Engineering, Marine
Lin Yu, Qinghao Meng, Hongwei Zhang
Summary: This study designed a multi-joint autonomous underwater vehicle for rapid and flexible vertical exploration of deep-sea structures, focusing on 3D modeling and attitude control. An LQR control method was used to solve the coupling and disturbance issues of the MJ-AUV, with simulation results showing the achievement of design objectives in the control system.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Review
Engineering, Electrical & Electronic
Tao Jing, Qing-Hao Meng, Hiroshi Ishida
Summary: This paper reviews the recent progress and development trends in the field of robot odor source localization, discussing research works grouped into four categories based on method principles. The paper also examines predictions of odor source direction and distance through in situ sensing and development of simulators, highlighting future outlooks for the field's flourishing.
IEEJ TRANSACTIONS ON ELECTRICAL AND ELECTRONIC ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Mohammad Irfan Iqbal, Shi Shuo, Yuanzhang Jiang, Bin Fei, Qingyou Xia, Xin Wang, Wenbo Hu, Jinlian Hu
Summary: The COVID-19 pandemic has significantly influenced personalized protection and healthcare, particularly in the area of respiratory masks. A new study has found that combining wool and melt-blown polypropylene in a bio-based respirator can provide superior protection and comfort, offering a new perspective for the development of future respiratory masks.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Optics
Weiping Liu, Jichuan Xiong, Juan Liu, Jing Zhu, Jinlian Hu, Lianping Hou, John H. Marsh, Muhua Yi, Xuefeng Liu
Summary: Accurate identification of shape and texture properties of cervical cell nuclei and cytoplasm using PIMI enables precise diagnosis of cervical cancer, with the method demonstrating the ability to reveal detailed fine structural features of cervical cells.
OPTICS COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Yin-Bo Liu, Ming Zeng, Qing-Hao Meng
Summary: In this article, a novel solution combining CNN and heatmap regression was proposed for unstructured road VP detection. By using a lightweight backbone and three advanced strategies, fast and high-precision detection was achieved, with the highest speed of 33 fps in empirical results.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Chemistry, Multidisciplinary
Zhangnan Li, Qinghao Meng, Yajie Yang, Xiaoqin Zou, Ye Yuan, Guangshan Zhu
Article
Computer Science, Information Systems
Hui-Rang Hou, Achim J. Lilienthal, Qing-Hao Meng
