Article
Physics, Applied
Xia Tian, Meizhen Xiang, Junzhi Cui, Guangyu Ji, Zhuojia Fu
Summary: The spalling behaviors of Ni/Al nanolaminates are influenced by the combination effects of micro-structures, chemical reactions, and temperature softening. A zigzag variation trend of spall strength is observed with increasing impact velocity, which is attributed to the interaction of liquid Al with amorphous Ni near the interface leading to rapid chemical reactions and enhanced spall strength.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Jianbing Xu, Yuxuan Zhou, Yun Shen, Cheng-ai Wang, Yueting Wang, Yinghua Ye, Ruiqi Shen
Summary: This study investigated the electrical explosive characteristics and heating process of Al/MoO3 micro energetic semiconductor bridge initiators with different bridge areas. The results showed that decreasing the bridge area led to a decrease in critical burst time and energy, but did not affect the flame duration time of MESCB.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Physical
Yifan Xie, Jian-Li Shao, Rui Liu, Pengwan Chen
Summary: This study investigates the shock-induced reaction mechanism and kinetics of premixed Ni/Al nanolaminates using molecular dynamics simulations and theoretical analysis. The reaction is found to be driven by the crystallization evolution in the premixed interlayer and the diffusion of premixed atoms. The study reveals multi-stage reaction patterns and different growth mechanisms of B2 grain. Microscopic diffusion theory analysis suggests a non-random diffusion nature for solid-state reaction initiation and purely random diffusion for solid-liquid reaction initiation.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Physics, Applied
Wei Liu, Xiaoming Ren, Yan Xue, Ruizhen Xie, Lan Liu
Summary: An enhanced reactive igniter was designed and fabricated by sputtering Al/CuO nanolaminates onto a NiCr micro-heater, enhancing the output energy and successfully igniting explosive materials. The thickness and grain sizes of the Al/CuO nanolaminates significantly affect the performance of the enhanced igniter.
MODERN PHYSICS LETTERS B
(2021)
Article
Mechanics
Yi Li, Lei Zhang, Wei Xiong, Mengting Tan, Chuang Liu, Xianfeng Zhang
Summary: This study investigates the in situ thermodynamics response and shock-induced kinetic evolution of Ni/Al nanolaminates using molecular dynamics simulations. The findings reveal that atomic diffusion plays a crucial role in accelerating the alloying reaction, and the shock-induced pressure must surpass a threshold to trigger a self-sustaining reaction.
Article
Nanoscience & Nanotechnology
Sijia Shen, Hongbo Li, Yanxiang Liang, Chuanyun Wang, Jiahong Niu, Nanming Feng, Ning Zhang, Lingwei Yang
Summary: This work studied the microstructural evolution and mechanical properties of Ni/Al nanolaminates with varying Ni mole ratio. It was found that the strength of the nanolaminates was enhanced after heat-treatment. A novel NiAl3/Ni2Al3 nanolaminate structure formed when the Ni mole ratio was 0.40, resulting in maximized strength. A homogeneous nanocrystalline NiAl phase formed when the Ni mole ratio was 0.53, leading to excellent ductility and intermediate strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
M. Vollmer, A. Bauer, M. J. Kriegel, M. Motylenko, T. Niendorf
Summary: A novel approach was introduced to obtain functionally graded properties in an Fe-Mn-Al-Ni shape memory alloy by aging a single crystalline sample in a partially martensitic state. The properties in the austenite aged area showed changed superelastic hysteresis, while the martensite aged area remained almost unchanged. The mean average size of nanometric beta precipitates strongly influenced the transformation temperatures and stresses in different aged areas.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Sijia Shen, Hongbo Li, Chuanyun Wang, Yanxiang Liang, Nanming Feng, Ning Zhang, Lingwei Yang
Summary: This study focuses on the mechanical properties and strengthening mechanism of Ni/Al nanolaminates, which are dominated by dislocation strengthening and constraint effects in the soft Al nanolayers. Nanoindentation and micropillar compression experiments reveal a constrained plasticity of Al nanolayers, resulting in a strain hardened behavior of Ni/Al nanolaminates. The strength of Al nanolayers is significantly increased with decreasing Al layer thickness, while the Ni layer thickness has less effect on the strength variation. The findings provide valuable insights into the strengthening mechanism and mechanical behavior of metallic nanolaminates with large elastoplastic mismatch.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Physical
Yusheng Qin, Zhaoxiang Yan, Qihua Wu, Ailong Jiang, Yujuan Li, Shixuan Ma, Shulin Lue, Jianyu Li
Summary: A new Al-Si-Cu-Ni alloy was prepared by micro-alloying and squeeze casting technology. The alloy exhibited refined microstructure, elimination of internal pores, and improved distribution of eutectic Si and complex second phases. The as-cast alloy showed high ultimate tensile strength and ductility, which were attributed to the reduction in porosity, grain refinement, and improvement in the morphology of the second phases.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Youqing Sun, Ensieh Yousefi, Anil Kunwar, Nele Moelans, David Seveno, Muxing Guo
Summary: This study investigated the wettability behavior of liquid aluminum on solid nickel at high temperatures, revealing the formation of Al3Ni phase as the primary phase and its significant influence on wetting behavior. Experimental and theoretical analyses confirmed the limited effect of Ni dissolution into Al at temperatures below 950 degrees C on wetting dynamics.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Xin Tu, Bin Hu, Renjie Xu, Qinyi Guo, Haiwen Luo
Summary: In this study, a 3 wt% Mn contained, and Cu-Ni-Al-V alloyed steel was developed, in which various precipitations and metastable austenite phase were formed. The choice of intercritical annealing temperature was found to significantly affect the tensile properties of the material. An intermediate annealing temperature of 700℃ resulted in the best mechanical combination.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Stepan Seropyan, Ivan Saikov, Dmitrii Andreev, Gulnaz Saikova, Mikhail Alymov
Summary: The study found that the introduction of continuous fibers into Ni-Al compacts significantly increases flexural strength, while the combination of heat treatment and material reinforcement further enhances strength without compromising reactivity.
Article
Materials Science, Multidisciplinary
Wan Du, Xue Fan, Hui Li, Dong Zhai, Yi Liu
Summary: In this study, a new force field potential called ReaxFFNiAl-S22 was developed for molecular dynamics simulations of Ni-based superalloys. This potential takes into account the effects of non-neutral charge distribution in alloys, which is often neglected in other potential models. The ReaxFFNiAl-S22 accurately describes various polymorphous structures and defects, and extends the capability of describing highly compressed crystal structures. This study demonstrates that reactive force fields can be used to study the mechanism of mechanical deformation with electrostatic effects.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Industrial
Cheng Luo, Yansong Zhang
Summary: In this study, Al/Ni reactive multilayer nanofoils were used as a local heat source at the faying interface of micro resistance welding of copper foils, leading to an increase in joint strength. Grain boundary relaxation and Kirkendall effect resulted in grain refining of the AlNi alloy compound at the faying interface, contributing to the improvement of joint strength.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
Mehdi Abdollahi Azghan, Ali Alizadeh
Summary: This study investigated the impact of tungsten (W) particles at different weight percentages on the thermally induced energy release and mechanical properties of 2Al-Ni and Al-Ni RSM composites. The addition of W particles decelerated the reaction occurrence and reduced the reaction energy. However, it significantly increased the reaction temperature of both composites. The mechanical test results aligned closely with the combustion test results, indicating an enhancement in compressive strength and hardness values with increasing W content.
Article
Robotics
Chohei Pang, Qicheng Wang, Kinwing Mak, Hongyu Yu, Michael Yu Wang
Summary: This paper introduces a new adaptive gecko gripper called Viko 2.0, which effectively combines the advantages of adhesives and visuotactile sensors to solve the difficulty of grasping large objects for robotic grippers. Compared with a non-hierarchical structure, the hierarchical structure with a multi-material design achieves a significant increase in adhesion and contact area, while the integrated visuotactile sensor can measure contact area, shear force, and incipient slip detection in real-time.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Siqi Yu, Yang Deng, Yik Kin Cheung, Hongyu Yu
Summary: In this study, a biaxially stretchable LED display was developed using a wavy structured-metal electrode grid and LED chips. The display showed excellent flexibility, being able to bend, roll, stretch, and even withstand washing without compromising image quality. This work demonstrated the potential of using inorganic materials and MEMS compatible processes for stretchable electronics fabrication.
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
(2022)
Article
Nanoscience & Nanotechnology
Xiaoyi Wang, Yang Deng, Peng Jiang, Xingru Chen, Hongyu Yu
Summary: The goal of this study is to develop a high-performance wearable strain sensor. By using a flexible capacitive sensor structure with three-dimensional interdigital electrodes, the researchers achieved excellent performance, including low hysteresis, good long-term stability, and transparency. The strain sensor was successfully applied to monitor different types of human activities and showed promising potential for applications.
MICROSYSTEMS & NANOENGINEERING
(2022)
Article
Robotics
Guanlan Zhang, Yipai Du, Hongyu Yu, Michael Yu Wang
Summary: This paper proposes a new design of a vision-based tactile sensor, DelTact, which achieves high accuracy and low error in contact deformation tracking through optimizing color pattern generation and optical flow algorithm. Experimental results demonstrate that the sensor has low error and high frequency characteristics.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Xingzhong Zhang, Yue Hou, Yang Yang, Ziyu Wang, Xiaosa Liang, Qingqing He, Yufeng Xu, Xiaolong Sun, Hongyu Ma, Jing Liang, Yong Liu, Wei Wu, Hongyu Yu, Haizhong Guo, Rui Xiong
Summary: In this study, a high-performance paper-based TE device was fabricated using simple screen-printing technology, which can be used for power generation and display. The findings offer potential applications in energy harvesting devices, optical encryption, anti-counterfeiting, and dynamic infrared display.
ADVANCED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Xiaoyi Wang, Yang Deng, Peng Jiang, Yik Kin Cheung, Zhongyi Liu, Huikai Xie, Hongyu Yu
Summary: In recent years, high-performance flexible pressure sensors have gained popularity and research attention due to their wide applications in various fields. However, it is challenging to achieve low cost and excellent performance simultaneously in flexible sensors.
IEEE SENSORS JOURNAL
(2023)
Article
Robotics
Chao Zhao, Chunli Jiang, Junhao Cai, Hongyu Yu, Michael Yu Wang, Qifeng Chen
Summary: Inspired by human learning process, this study proposes a method to extract and exploit latent intents from demonstrations, and learn diverse and robust grasping policies through self-exploration. The learned policy demonstrates remarkable zero-shot generalization from simulation to the real world while retaining its robustness against novel objects and cluttered environments.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Chohei Pang, Jae-Kang Kim, Yingdan Wu, Michael Yu, Hongyu Yu, Metin Sitti
Summary: This study presents an elastomeric microstructure that overcomes the trade-off between adhesive strength and trigger force. The optimal design exhibits strong adhesive strength and negligible detachment strength, even in wet conditions. Manipulation tasks of fragile and tiny parts as well as transfer across water and air interfaces are successfully demonstrated.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Robotics
Chao Zhao, Shuai Yuan, Chunli Jiang, Junhao Cai, Hongyu Yu, Michael Yu Wang, Qifeng Chen
Summary: This letter presents ERRA, an embodied learning architecture that enables robots to jointly acquire reasoning, planning, and interaction abilities for solving long-horizon language-conditioned manipulation tasks. ERRA integrates coarse-resolution inference using a large language model to infer action language from natural language instruction and environment state, and fine-resolution inference using a Markov decision process to perform concrete actions based on action language. The robot decomposes and accomplishes long-horizon tasks interactively through the coarse-to-fine inference. Extensive experiments demonstrate that ERRA can successfully complete various long-horizon manipulation tasks specified by abstract language instructions and generalize to novel but similar natural language instructions.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Nan Nathan Xu, Yiqi An, Hongyu Yu, Jinglei Yang
Summary: This letter examines the performance of on-silicon inductor coils with integrated buck dc-dc converters made using a 180 nm CMOS process. A parallel shunting structure with different metal layers was chosen for its lower resistance and higher inductance in low-power IoT scenarios. Simulation results demonstrate stable values of more than 230 nH for the fabricated inductors within the expected frequency range. The proposed dc-dc converter achieves an efficiency of 69.1% at 30 MHz for a 12.9 mA load, operating at voltage levels of 2.4 to 1.2 V. Our approach enables high-inductance integration without the need for costly postprocessing techniques, expanding the application of power inductor and dc-dc converter integration.
IEEE SENSORS LETTERS
(2023)
Review
Nanoscience & Nanotechnology
Liying Jiang, Xinyi Lin, Fenghua Chen, Xiaoyun Qin, Yanxia Yan, Linjiao Ren, Hongyu Yu, Lingqian Chang, Yang Wang
Summary: The use of biomarkers for early diagnosis and real-time monitoring of tumor cells is crucial due to increases in tumor morbidity and mortality rates. Circulating tumor cells, circulating tumor DNA, and exosomes have high potential for prediction, diagnosis, and prognosis of tumor diseases. Enzyme-linked immunosorbent assays, immunoblotting, and mass spectrometry are widely used techniques for detecting these markers. Electrochemical and fluorescence biosensors are preferred for detecting tumor cell markers in body fluids due to their high sensitivity, rapid detection, and portable operation.
MICROSYSTEMS & NANOENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Ruoqin Wang, Rui Jiao, Yiting Li, Yang Li, Yixin Wang, Qian Xu, Zhigang Li, Hongyu Yu
Summary: A novel design using Miura-ori microstructure has been presented to enhance the sensitivity of flexible pressure sensors. The sensor showed significant improvement in sensitivity compared to commonly used microstructures. It also exhibited good durability and rapid response time, making it suitable for monitoring human physiological signals.
IEEE SENSORS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Yixin Wang, Xingru Chen, Rui Jiao, Hongyu Yu
Summary: In this study, a novel microstructured capacitive pressure sensor is proposed, which combines photolithography techniques with advanced materials including vertically aligned multiwall carbon nanotubes (VA-MWCNTs) and ion gel. The introduction of micropyramidal electrodes and microhemispheric electrolyte with poly(vinyl alcohol)/phosphoric acid (H3PO4) ion gel greatly improves sensitivity (124.9 kPa(-1)) and response time (125 ms). Moreover, the use of VA-MWCNTs coated with parylene-C enhances the electrode's durability and ensures remarkable repeatability of the entire system under various pressure conditions. The excellent performance in both static and dynamic measurements positions this sensor as a promising candidate for health monitoring applications.
IEEE SENSORS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Yang Li, Jiacheng Jiang, Ruoqin Wang, Zanxiang Mao, Lin Fang, Yirui Qi, Junsheng Zhang, Chili Wu, Hongyu Yu
Summary: Most reported flexible smart gloves are complex in mass processing and have stability problems in the interface with the circuit, limiting their wide application. The communication latency caused by wireless transmission also restricts remote interaction, and improving signal transmission speed has limitations. In this letter, an integrated full print production flexible smart glove and a deep learning based motion intention prediction method were developed to overcome these shortcomings and reduce communication latency.
IEEE SENSORS LETTERS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Rui Jiao, Gai Yang, Ruoqin Wang, Yue Tang, Zhongyi Liu, Huikai Xie, Hongyu Yu, Xiaoyi Wang
Summary: In this paper, a CMOS compatible micro-Pirani gauge was developed using a CMOS compatible fabrication process. The study revealed that a tiny fluid conduction gap can enhance sensitivity and improve the dynamic measurement range, especially in high-pressure regions. CFD simulation and experimental results confirmed the higher sensitivity and larger measurement range achieved by the T-type device compared to the L-type device, with good stability.
2023 IEEE 36TH INTERNATIONAL CONFERENCE ON MICRO ELECTRO MECHANICAL SYSTEMS, MEMS
(2023)
