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different Phase Transformation Behaviors of B2-CuZr Crystalline Phase and Their Associated Mechanical Properties by Molecular dynamics Using different Potentials

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SSRN 2024年

作者： Wu, Jiaqing Zhu, Mixun Li, Shuxian Zhong, Hongtao Li, Peiyou Song, Kaikai Song, Wenli Tan, Ming Jen Yang, Yuanzheng Fu, Xiaoling School of Materials and Energy Guangdong University of Technology Guangzhou510006 China School of Materials Science and Engineering Shaanxi University of Technology Hanzhong723001 China School of Mechanical Electrical & Information Engineering Shandong University Weihai264209 China Beijing100049 China Spallation Neutron Source Science Center Dongguan523803 China Singapore Centre for 3D Printing School of Mechanical and Aerospace Engineering Nanyang Technological University Singapore639798 Singapore

Metastable CuZr-based alloys have attracted much attention due to their high glass-forming ability and shape memory effect. Many experiments have underscored the pivotal role of the B2-CuZr phase as an effective inclusion to improve both the strength and ductility of metallic glass matrix composites. The improved ductility can be attributed to the dilatation induced by martensitic transformation, while the strengthening effect is owed to the higher strength and hardness of the martensite phase compared to the austenite phase. Well-designed atomistic simulations can predict the mechanical behavior of materials before experiments and offer sufficient information on the atomic scale. The selection of an appropriate interatomic potential is a primary concern in any atomistic simulation and needs to be carefully considered to ensure reliable results. The uniaxial tensile behavior of B2-CuZr crystalline phase is investigated by molecular dynamics simulations using five typical potentials, namely the potentials developed by Mendelev-2007, Mendelev-2009, Mendelev-2016, Mendelev-2019 and Cheng-2009. The phase transformation behavior during tension, Young’s modulus, and yield strength of the simulated samples exhibit variations when different potentials are employed. Notably, only by employing Mendelev-2019 and Cheng-2009 potentials, the strength and Young’s modulus of the transformed phase are higher than the untransformed austenite phase, corresponding well with experimental results. This work emphasizes the impact of different interatomic potentials on phase transformation behaviors within a specific simulation context. © 2024, The Authors. All rights reserved.

关键词： Yield stress

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Magnesium alloy implant GZ31K with enhanced corrosion resistance promotes fracture healing in vitro and in vivo systems

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Journal of Magnesium and Alloys 2025年

作者： Yusufu, Yalikun Zhang, Yunyang Liu, Xinyun Jiang, Jiahao Shao, Zhiqiang Sun, Minghui Zhang, Xiaobo Jiang, Qing Division of Sports Medicine and Adult Reconstructive Surgery Department of Orthopedic Surgery Nanjing Drum Tower Hospital Affiliated Hospital of Medical School Nanjing University Jiangsu Nanjing210008 China State Key Laboratory of Pharmaceutical Biotechnology Nanjing University Jiangsu Nanjing210008 China Branch of National Clinical Research Center for Orthopedics Sports Medicine and Rehabilitation Jiangsu Nanjing210008 China Institue of Medical 3D Printing Nanjing University Jiangsu Nanjing210008 China Jiangsu Engineering Research Center for 3D Bioprinting Jiangsu Nanjing210008 China Centre for Shared Scientific Research Facilities Nanjing University Jiangsu Nanjing210023 China School of Stomatology Xuzhou Medical University Jiangsu Xuzhou221004 China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology School of Materials Science and Engineering Nanjing Institute of Technology Jiangsu Nanjing211167 China

Magnesium and its alloys have garnered significant attention as promising materials for bone tissue engineering, owing to their bone-like density and elastic modulus, favorable mechanical properties, biodegradability, biocompatibility, and diverse biological activities. However, rapid degradation, subcutaneous gas formation from H2 release, and osteolysis caused by elevated Mg concentrations have limited its widespread clinical application. In this study, Mg-3.0Gd-1Zn-0.4Zr (GZ31K) alloy with desirable uniform degradation and stress corrosion resistance under extruded and drawn condition was used as internal fixation implants for fracture healing, while the commercially available WE43 alloy was used as control. Results revealed that GZ31K alloy exhibited refined grain structure, nanoscale distributed stacking faults and superior corrosion resistance compared to WE43 alloy. The corrosion rate of the extruded GZ31K and WE43 alloys are 0.25 mm/year and 0.35 mm/year, meeting the corrosion tolerance threshold for orthopedic implants ( © 2025

关键词： Corrosion resistant alloys

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Nano-size carbide-reinforced Ni matrix composite prepared by selective laser melting

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Nano Materials Science 2020年第4期2卷 316-322页

作者： Rui Wang Guoliang Zhu Chao Yang Wei Wang donghong Wang Anping dong da Shu Liang Zhang Baode Sun Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China Shanghai Engineering Research Center of 3D Printing Materials Shanghai Research Institute of MaterialsShanghai200437China

Thermally stable nano-size ceramic particles are the preferred reinforcements for superalloys as they improve the alloys'microstructural stability and high-temperature *** this work,very dense and crack-free carbidereinforced GTd222(nickel-based superalloy)composites were prepared via selective laser melting(SLM).The distribution of TiC nanoparticles presents a three-dimensional(3d)network structure in the SLMed TiC/GTd222 *** testing revealed that the SLMed TiC/GTd222 composite has superior strength(UTS?1320 MPa,YS?1100 MPa)compared to the SLMed GTd222 *** GTd22 alloy reinforced with carbide nanoparticles’distinctive microstructure and its excellent mechanical properties for is discussed.

关键词： TiC/GTd222 composite Three-dimensional network structure Selective laser melting Microstructure Mechanical properties

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d-band Quasi-Yagi Antenna in Glass-based Package

D-band Quasi-Yagi Antenna in Glass-based Package

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IEEE MTT-S International Microwave and RF Conference

作者： Serhat Erdogan Madhavan Swaminathan 3D Systems Packaging Research Center School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta USA 3D Systems Packaging Research Center School of Materials Science and Engineering Georgia Institute of Technology Atlanta USA

ISBN: (纸本)9781665458764

This paper presents design, fabrication and measurement results of a printed quasi-Yagi antenna with monopole radiator on glass substrate with low-loss polymer buildup films operating in d-band. Simulated peak gain of the antenna is 6.2 dBi, measured impedance bandwidth $\left(\left|S_{11}\right|\lt-10 \mathrm{~dB}\right)$ covers the entire d-band $(110-170 \mathrm{GHz})$. Size of the antenna is $0.887 \mathrm{~mm}$ $\times 0.919 \mathrm{~mm}$, or $0.413 \lambda_3 \times 0.429 \lambda_3$ at 140 GHz. Return loss measurements show high repeatability. Wide bandwidth of the antenna, high simulated gain, compact size, and advantages of glass-based packages in terms of supporting high level of integration using Glass Panel Embedding makes it suitable for handset devices for sub-THz wireless communications in d-band.

关键词： Antenna measurements Microwave antennas Wireless communication Glass Gain measurement Telephone sets Loss measurement

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Rapid Fabrication of Antireflective Structures on Zns Surface By Spatial Shaping Femtosecond Laser

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SSRN 2023年

作者： Zhou, Kun Yuan, Yanping Wang, Chunlian Zhang, Kaihu Chen, Jimin He, Huiyu Institute of Laser Engineering Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China Key Laboratory of Trans-scale Laser Manufacturing Technology Beijing University of Technology Ministry of Education Beijing100124 China Beijing Engineering Research Centre of 3D Printing for Digital Medical Health Beijing University of Technology Beijing100124 China Beijing Spacecrafts China Academy of Space Technology Beijing100094 China

Antireflection performance and fabrication efficiency are key factors that affect the practical application of antireflective structures. Nowadays, how to combine good antireflection performance with highly efficient processing is still a difficult problem. In this work, a novel and scalable method of fabrication of antireflective sub-wavelength structures on ZnS surface by spatial shaping femtosecond laser is proposed. A Gaussian beam is converted to a line beam by a cylindrical lens transformation. The focal long axis of line beam is on the scale of centimeters, and the minor axis is on the scale of micrometers. Hence, the fabrication efficiency can be significantly improved by adjusting the scanning direction perpendicular to the long axis. Notably, the proposed highly efficient method only takes 21s to complete the fabrication of 1×1 cm2 antireflective SWS ZnS surface with excellent antireflective property. At the laser power of 500 mW, scan speed of 1.0 mm/s, scan interval of 0.55 cm, the transmittance of fabricated antireflective structures maintains 78%~87.5% at 2.5 μm-10 μm, with the average transmittance of 81.3%, 5.9% higher than that of untreated ZnS. This proposed method may open a revolutionary concept for the rapid antireflective surface laser processing, which has a great application potential in energy, military, aerospace and other fields. © 2023, The Authors. All rights reserved.

关键词： Zinc sulfide

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Characterization of Chip-to-Package Interconnects for Glass Panel Embedding (GPE) for Sub-THz Wireless Communications

Characterization of Chip-to-Package Interconnects for Glass ...

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Electronic Components and technology Conference (ECTC)

作者： Serhat Erdogan Siddharth Ravichandran Xiaofan Jia Madhavan Swaminathan 3D Systems Packaging Research Center School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta USA 3D Systems Packaging Research Center School of Material Science and Engineering Georgia Institute of Technology Atlanta USA

This work presents characterization of microvia interconnects in d-band frequencies for use as chip-to-package interconnects in Glass Panel Embedded (GPE) packages. Antenna-in-Package based on wafer-level fanout technology have demonstrated superior performance along its small form factor by eliminating wire-bond, assembly, underfill and package substrates. However, epoxy mold compounds, which limit the use of fanout packages at sub-Thz frequencies, do not support the electrical performance, thermal and thermo-mechanical needs of such applications. Embedding chips in glass panels, on the other hand, leverages all benefits of glass substrates and low-loss polymer buildup dielectrics while also mitigating the effects of wire-bond and microbumps for chip-to-package interconnects. In this paper, the design, fabrication, and characterization of these all-copper microvia-like chip-to-package interconnects is presented. These interconnects achieve an average chip-to-package loss of 0.146 dB in d-band and 0.177 dB maximum loss at 170 GHz which is lower than current flip-chip approaches, and our objective is to incorporate such interconnects in the proposed GPE package.

关键词： Wireless communication Fabrication Thermomechanical processes Electronic components Glass Insertion loss Electronic packaging thermal management

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Biomaterials and scaffolds for tissue engineering and regenerative medicine

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BMC Methods 2024年第1期1卷 1-3页

作者： Kim, Yang-Hee Vijayavenkataraman, Sanjairaj Cidonio, Gianluca Bone & Joint Research Group Centre for Human Development Stem Cells & Regeneration Faculty of Medicine University of Southampton Southampton UK The Vijay Lab Division of Engineering New York University Abu Dhabi Abu Dhabi UAE 3D Microflulidic Biofabrication lab Center for Life Nano- & Neuro-Science Italian Institute of Technology Rome Italy

Methods in tissue engineering and regenerative medicine are constantly evolving to address the complex challenges of repairing damaged tissues and modeling diseased organs using a library of various biomaterials, cellular therapies, and biofabrication techniques. The BMC Methods Collection ‘Biomaterials and scaffolds for tissue engineering and regenerative medicine’ will host the most recent advances in tissue engineering and regenerative medicine approaches, providing a comprehensive resource for researchers in the field.

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USV Path Planning Under Marine Environment Simulation Using dWA and Safe Reinforcement Learning

USV Path Planning Under Marine Environment Simulation Using ...

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IEEE International Conference on Automation Science and engineering (CASE)

作者： Tianci Qu Gang Xiong Hub Ali Xisong dong Yunjun Han Zhen Shen The State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of Automation Chinese Academy of Sciences Beijing China School of Artificial Intelligence University of Chinese Academy of Sciences Beijing China Beijing Engineering Research Center of Intelligent Systems and Technology Institute of Automation Chinese Academy of Sciences Beijing China Guangdong Engineering Research Center of 3D printing and Intelligent Manufacturing Cloud Computing Center Chinese Academy of Sciences Dongguan China Qingdao Academy of Intelligent Industries Qingdao China

It is a challenge for USV navigation due to uncertainties and disturbances in the complex marine environment, which may lead to tilting or collision. However, current path planning methods for USVs lack dynamic environment adaptivity and timeliness. We formulate this problem as a Markov decision Process (MdP) and combine the advantages of dynamic Window Approach (dWA) and Safe Reinforcement Learning (RL) to solve it. First, the state encoding output by dWA is employed as observation to reduce the state dimension. Second, a safety-ensured reward function is designed to avoid collision areas. Then, the actor-critic network based on RL algorithm is used. Along with the RL training, the parameters in dWA is adaptively adjusted. Simulation experiments with dynamic waves and ocean currents demonstrate the adaptivity of our method, with avg. trajectory length decreased by 10%, avg. time cost decreased by 17%, and avg. speed increased by 18%, compared to the case using only dWA.

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3d printing for tissue/organ regeneration in China

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Bio-design and Manufacturing 2025年第2期8卷 169-242,I0001,I0002页

作者： Chaofan He Jiankang He Chengtie Wu Changshun Ruan Qi Gu Yongqiang Hao Yang Wu Shuo Bai Xiaoxiao Han Liliang Ouyang Jun Yin Hongzhao Zhou Zhuo Xiong Maobin Xie Lei Shao Jing Nie Liang Ma Cijun Shuai Changchun Zhou Xin Zhao Xuetao Shi Mengfei Yu Jiayin Fu Peng Wen Huixia Xuan Yuan Pang Yan’en Wang Yuan Sun Ziqi Gao Abdellah Aazmi Jingbo Zhang Tianhong Qiao Qixiang Yang Ke Yao Mao Mao Jianxin Hao Pinpin Wang Jirong Yang Huawei Qu Xinhuan Wang Xin Liu Shen Ji Shasha Liu Jingke Fu Bingxian Lu Mohan Wu Feng Chen Zihao Zheng Boqing Zhang Muyuan Chai Chaoying Zhang Mouyuan Sun Bo Peng Huayong Yang Yong He State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Research Center for Human Tissue and Organ Degeneration Institute of Biomedicine and BiotechnologyShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Organ Regeneration and Reconstruction State Key Laboratory of Membrane BiologyInstitute of ZoologyChinese Academy of SciencesBeijing 100101China Beijing Institute for Stem Cell and Regenerative Medicine Beijing 100101China Shanghai Engineering Research Center of Innovative Orthopaedic Instruments and Personalized Medicine Clinical and Translational Research Center for 3D Printing TechnologyShanghai 200011China School of Biomedical Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Key Laboratory of Biopharmaceutical Preparation and Delivery Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China National Engineering Research Centre for High Efficiency Grinding Hunan UniversityChangsha 410082China Biomanufacturing Center Department of Mechanical EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijing 100084China The Fourth Affiliated Hospital of Guangzhou Medical University Guangzhou 511436China School of Biomedical Engineering Guangzhou Medic

As surgical procedures transition from conventional resection to advanced tissue-regeneration technologies,human disease therapy has witnessed a great leap *** particular,three-dimensional(3d)bioprinting stands as a landmark in this setting,by promising the precise integration of biomaterials,cells,and bioactive molecules,thus opening up a novel avenue for tissue/organ *** by the editorial board of Bio-design and Manufacturing,this review brings together a cohort of leading young scientists in China to dissect the core functionalities and evolutionary trajectory of 3d bioprinting,by elucidating the intricate challenges encountered in the manufacturing of transplantable *** further delve into the translational pathway from scientific research to clinical application,emphasizing the imperativeness of establishing a regulatory framework and rigorously enforcing quality-control ***,this review outlines the strategic landscape and innovative achievements of China in this field and provides a comprehensive roadmap for researchers worldwide to propel this field collectively to even greater heights.

关键词： 3d printing Bioprinting Tissue engineering Regenerative medicine

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design of bone defects prosthesis models on tomography images 3

Design of bone defects prosthesis models on tomography image...

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3rd International Conference on Advanced Electronic Materials, Computers and Software engineering, AEMCSE 2020

作者： Feng, Bohua Liang, Zili deng, Qiaofeng Luo, Jianxu Xie, Xinrui Guangdong Pharmaceutical University China Guangdong Engineering and Technology Research Center Medical 3D Printer and Personalized Medicine China

ISBN: (纸本)9781728181431

Bone defect refers to the destruction of the structural integrity of the bone. The shapes of bone defects are different. The various three-dimensional models design methods are selected to achieve the design of repairing and reconstruction models of two kinds of bone defects. For patients with partial defects in the right tibia and fibula, a three-dimensional model is mirrored through the left leg according to the symmetry, and the defect part is obtained through the Boolean operation with the right leg. For patients with cervical fracture, the centrum is separated from the cervical vertebrae, and two cylinders are designed as screw access channels. A layer of panel is constructed on the surface. Then the separated panel is thickened to build a model of vertebral pedicle screw. © 2020 IEEE.

关键词： Fracture

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