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Bio-tribological Characteristics of 3D-Printed Ti–Ta–Nb–Mo–Zr High Entropy Alloy in Human Body Emulating Biofluids for Implant Applications

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Journal of Bio- and Tribo-Corrosion 2023年第1期9卷 1-21页

作者： Kumar, Pankaj Patel, Mahesh Jain, Neelesh Kumar Gupta, Sharad Department of Mechanical Engineering Indian Institute of Technology Indore MP Indore453 552 India Department of Metallurgical and Material Science Engineering Indian Institute of Technology Indore MP Indore453 552 India Department of Biosciences and Biomedical Engineering Indian Institute of Technology Indore MP Indore453 552 India

This paper presents findings on corrosion and tribo-corrosion characteristics in human body emulating biofluids of 7.4 pH value at 37 °C, dry fretting wear, and abrasion resistance of equiatomic Ti–Ta–Nb–Mo–Zr high entropy alloy (HEA) developed by μ-plasma-based 3D-printing process. Physiological saline, phosphate buffered saline (PBS) solution, and 1% fetal bovine serum mixed with the PBS solution were used as the human body emulating biofluids to study corrosion and tribo-corrosion characteristics of the developed HEA. Minor abrasive wear and material ploughing in dry fretting wear zone are observed occurring due to the formation of loose wear debris and large-scale material displacement, respectively. The presence of biofluids significantly reduced coefficient of friction, average depth of worn scar, specific wear rate, open-circuit potential values, corrosion potential, and corrosion current density. Ti–Ta–Nb–Mo–Zr HEA showed better corrosion and tribo-corrosion resistance than Ti–22Nb, Ti–22Nb–6Zr, Ti–12Mo–5Ta, and Ti–20Nb–10Zr–5Ta alloys due to the formation of strong passive layers of oxides of its constituents, i.e., TiO2, Ta2O5, Nb2O5, NbO2, and ZrO2. It has higher abrasion resistance at higher applied load without much change in coefficient friction imparting it better resistance to wear and tear. Findings of this study make Ti–Ta–Nb–Mo–Zr HEA as preferable orthopedic implant material than the presently used materials. Graphical Abstract: [Figure not available: see fulltext.] © 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

关键词： Titanium dioxide

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Investigation of manufacturing conditions of single roll rapidly solidified ribbon for anode materials of magnesium rechargeable batteries

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Keikinzoku/Journal of Japan Institute of Light Metals 2023年第11期73卷 537-544页

作者： Kirimoto, Yuichi Fuke, Kousuke Tsukeda, Tadayoshi Aida, Tetsuo Nemoto, Yasunori Ikeda, Minoru Tabata, Hironobu Kurihara, Hideki Suzuki, Mayumi Department of Nano and Functional Material Science Graduate School of Science and Engineering for Education University of Toyama 3190 Gofuku Toyama-shi-shiToyama Toyama930-8555 Japan Program of Materials Science and Engineering Studies in Science and Engineering Graduate School of Science and Engineering University of Toyama Toyama-shi-shiToyama Toyama Japan Faculty of Sustainable Design Academic Assembly University of Toyama Toyama-shi Toyama-shi-shiToyama Toyama Japan FLOW Science JAPAN Shizuoka Hamamatsu-shi Japan CHUETSU METAL WORKS CO. LTD Nakaniikawa-gun Toyama Japan Saitama Industrial Technology Center Saitama Kawaguchi-shi Japan Department of Mechanical Systems Engineering Faculty of Engineering Toyama Prefectural University Imizu-shi Toyama Japan

Magnesium rechargeable batteries are attracting attention as next-generation rechargeable batteries because of their resource abundance, cost, safety, and high electrical capacity per volume compared to conventional lithium-ion rechargeable batteries. Our joint research team focused not only on the electrochemically active magnesium composition of ribbon for the negative electrode materials of magnesium rechargeable batteries but also on the production process, focused on the single roll type liquid quenching and rapid solidification method, which can be produced at a lower cost. In this study, the optimal processing conditions were examined by comparing CAE analysis with ribbon actually manufactured, with the aim of further improving manufacturing conditions using the same method, such as length discontinuities, thickness, and surface properties of ribbon. We specifically various process parameters such as injection pressure and roll peripheral speed for evaluation. As a result, several linear cracks were observed on the surface of the ribbon as the peripheral speed increased and as the Gap became wider, and the surface properties tended to deteriorate. Also, It was found that the dominant factor in the length of the ribbon was the peripheral speed. As the peripheral speed increased, the length of the ribbon tended to increase. © 2023 Japan Institute of Light Metals. All rights reserved.

关键词： Surface properties

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Microstructure of hydrogen electrode catalyst layer materials for solid oxide electrolysis cells

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International Journal of Hydrogen Energy 2025年 137卷 830-839页

作者： Mohanty, Debabrata Chao, Ko-Yun Lin, Tai-Nan Lee, Sheng-Wei Tseng, Chung-Jen Hung, I-Ming Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan32003 Taiwan Department of Material Research National Atomic Research Institute Taoyuan32546 Taiwan Institute of Materials Science and Engineering National Central University Taoyuan City32001 Taiwan Department of Mechanical Engineering National Central University Taoyuan City32001 Taiwan Research Center National Cheng Kung University Tainan70101 Taiwan

This research explores the synthesis of Ce0·6Mn0·3Fe0·1O2-δ (CMF) catalyst using the citric acid-EDTA method. CMF mixtures with various active carbon pore-forming amounts are achieved through controlled atmosphere sintering, revealing low permeability and high porosity. The permeability correlates with the microstructure. Results show poor porosity in unsintered carbon at 1250 °C. Increasing the amount of pore-forming powders does not enhance porosity. Sintering CMF and 9% active carbon at 1250 °C under Ar and then in air at 900 °C increases active carbon porosity, resulting in a mixture with a specific surface area of 2.11 m2 g−1 and porosity of 50.82%. This composition surpasses others in characteristics. Electrochemical assessment of solid oxide electrolysis cells (SOECs) indicates that Pt/SDC/CMF+9%AC (cell B) outperforms Pt/SDC/Pt (cell A), demonstrating potential for CMF oxide cathodes in steam electrolysis during SOEC operations with a current density of 847 mA cm−2 at 1.5 V. © 2024

关键词： Regenerative fuel cells

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Correlating dynamic relaxation and viscoelasticity in metallic glasses

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science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 81-90页

作者： GuangHui Xing Qi Hao Fan Zhu Yun-Jiang Wang Yong Yang Hidemi Kato Eloi Pineda Si Lan JiChao Qiao School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi'an 710072China State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China Department of Mechanical Engineering College of EngineeringCity University of Hong KongHong Kong 999077China Department of Materials Science and Engineering College of EngineeringCity University of Hong KongHong Kong 999077China Institute for Materials Research Tohoku UniversitySendai 980-8577Japan Department of Physics Institute of Energy TechnologiesUniversitat Politècnica de CatalunyaBarceona 9Spain School of Material Science and Engineering Herbert Gleiter Institute of NanoscienceNanjing University of Science and Technology.Nanjing 210094China State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Northwestern Polytechnical UniversityXi'an 710072China

Relaxation dynamics,essential for the structural evolution of non-equilibrium systems like glassy materials,remain ***,we explore relaxation dynamics and viscoelastic properties in three types of metallic glasses with distinctβrelaxation *** systems with significantβrelaxation,stress relaxation and creep experiments reveal a transition from two-step to one-step relaxation with rising ***,such a phenomenon is absent in systems with weakerβ*** model the two-step relaxation process using a double Kohlrausch-Williams-Watts equation,and the obtained relaxation times elegantly adhere to the Arrhenius *** combining fitted activation energies with theoretical analysis,we conclusively attribute these relaxation processes toβrelaxation andαrelaxation,***,we analyze the relaxation time spectra of two processes and establish a comprehensive picture linking dynamic relaxation with *** study provides new strategies for probing the complex relaxation behaviors of glasses from the perspective of viscoelasticity.

关键词： creep relaxation glasses

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Effect of Zr on microstructure and mechanical properties of 304 stainless steel joints brazed by Ag-Cu-Sn-In filler metal

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Journal of Iron and Steel Research International 2024年第10期31卷 2448-2462页

作者： Ling-ling Huang Jian Qin Jun-lan Huang Hua Yu Chao Jiang Lu-yang Song Zhuo-li Yu Zhi-qian Liao Yan-zhao Cai Li Ma Shi-zhong Wei School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang471000HenanChina National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials Henan University of Science and TechnologyLuoyang471000HenanChina State Key Laboratory of Advanced Brazing Filler Metals and Technology Zhengzhou Research Institute of Mechanical Engineering Co.Ltd.Zhengzhou450001HenanChina Luoyang Ship Material Research Institute Luoyang471039HenanChina Avic Jonhon Optronic Technology Co. Ltd.Luoyang471039HenanChina

The effect of Zr on the microstructure and mechanical properties of 304 stainless steel joints brazed with Ag-Cu fillers was *** incorporation of Zr had little effect on the solid-liquid phase line of the fillers,and the melting temperature range of the fillers was narrowed,which enhanced their fluidity and *** presence of Zr in the form of heterogeneous particles augmented the nucleation rate during solidification,transforming the intermittently distributed gray-black coarse dendrites into cellular *** structural transformation led to fragmentation and refinement of the *** dissolution of Zr into Ag and Cu promoted the transformation of low-angle grain boundaries to high-angle grain boundaries(HAGBs),hindering crack *** element in the brazing seam led to grain refinement and increased density of grain *** grain refinement could disperse the stress,and HAGBs could resist the dislocation movement,improving the joint *** results display that when Zr content was 0.75 wt.%,the maximum strength was 221.1 *** fracture occurred primarily at the brazing seam,exhibiting a ductile fracture.

关键词： Active element Ag-Cu filler Stainless steel Brazing mechanical property

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Application of a Self-Assembly Sensing Layer to Grating Sensor Cabinets for Biomedical Sensing of Rheumatoid Arthritis Antigen-Antibodies

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IEEE Sensors Journal 2024年第7期24卷 10039-10047页

作者： Wen, Hsin-Yi Hsu, Hsiang-Cheng Feng, Wen-Kai Jhan, Kai-Siang Yeh, Yao-Tsung Chiang, Chia-Chin National Kaohsiung University of Science and Technology Department of Chemical and Materials Engineering Kaohsiung80778 Taiwan National Kaohsiung University of Science and Technology College of Maritime Department of Ph.D. Program in Maritime Science and Technology Kaohsiung807618 Taiwan National Kaohsiung University of Science and Technology Department of Mechanical Engineering Kaohsiung80778 Taiwan Fooyin University Department of Medical Laboratory Science and Biotechnology Kaohsiung83102 Taiwan

In this article, we harnessed biomedical applications in laser-assisted etching long-period fiber gratings (LLPFGs) sensors, subsequently deploying them within the realm of biomedical applications. The primary aim of this study was to devise a sensitive method for the detection of antigen-antibodies associated with rheumatoid arthritis (RA) using LLPFGs. Sensing the antigen binding took place on the surface of the optical fiber through a self-assembling process. Given the inherent limitations of conventional rheumatoid factor (RF) testing in terms of specificity, we introduced an innovative serum-based approach geared toward the identification of anti-cyclic citrullinated peptide (Anti-CCP) antibodies. This method exhibited an impressive diagnostic accuracy rate of approximately 80% for RA cases, coupled with an exceptional specificity level of 98% for individuals without RA. The incorporation of LLPFGs in the detection of RA antigen-antibodies presents a highly promising avenue for enhancing the precision and reliability of RA diagnosis. Furthermore, this research aligns closely with the United Nations Sustainable Development Goal (SDG)3, which strives to promote well-being across all age groups and advance sustainable development by addressing health-related challenges, including the accurate diagnosis of diseases like RA. © 2023 IEEE.

关键词： Antibodies

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An IoT-based Parameter Extraction Platform for Powder Metallurgy Sintering Furnace 11

An IoT-based Parameter Extraction Platform for Powder Metall...

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11th International Conference on Internet of Things: Systems, Management and Security, IOTSMS 2024

作者： Chang, Shih-Man Lin, Hao Pu Han, Chin-Chuan Wu, Yu-Chi National United University Dept. of Computer Science and Information Engineering Miao-Li Taiwan National United University Program in Material and Chemical Engineering MiaoLi Taiwan National United University Dept. of Electrical Engineering Miao-Li Taiwan

ISBN: (纸本)9798350366501

Internet of Things (IoT) technology has widely used in industrial production. Most cases focused on designing new equipment or processes. However, small and medium enterprises especially the powder metallurgy manufacturers in Taiwan would not replace existing production equipment due to the finical problems. In this study, an IoT-based platform is conducted to extract the sintering parameters for technology to augment sintering furnaces by installing sensors and data transmission modules, setting a sintering parameter extraction platform for powder metallurgy sintering furnace. Long-term monitoring and remote control are the main technologies for solving three problems during the sintering process, i.e., temperature, atmosphere, and time. Monitoring targets include checking whether the heaters are damaged, ensuring stable air flow meter readings, and verifying the normal speed of the conveyor belt. Additionally, remote control technology has been developed to execute cooling and reheating processes on the sintering furnace. The staying time on-site for personnel is reduced and the sintering time is increased for production increase during working hours. © 2024 IEEE.

关键词： Belt conveyors

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Severe Plastically Deformed Mg–Zn–Zr–RE Alloy Developed as a Biomaterial

Severe Plastically Deformed Mg–Zn–Zr–RE Alloy Developed a...

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Magnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2024

作者： Shunmugasamy, Vasanth C. Mansoor, Bilal Mechanical Engineering Program Texas A&M University at Qatar Doha Qatar Department of Materials Science and Engineering Texas A&M University College StationTX United States

ISBN: (纸本)9783031502392

Mg alloysMagnesium alloys (Mg alloys) have high corrosion rateCorrosion Rate that inhibits their application as biomaterialBiomaterials. For safe use as biomaterial, it is essential to control their corrosion ratesCorrosion Rate. In Mg alloys, microgalvanicMicro-galvanic corrosion coupling between the α-Mg matrix and secondary precipitates can exist which results in increased corrosion rate. To address this challenge, we engineered the microstructureMicrostructure of a biodegradable Mg–Zn–RE–Zr alloy by severe plastic deformationPlastic deformation process such as friction stir processingFriction Stir Processing (FSP) (FSP), improving its corrosion resistance and mechanical propertiesmechanical Properties simultaneously. Subjecting the alloy to FSP resulted in refined grains, basal textureTexture and broken and uniformly distributed secondary precipitates. In vitro corrosion of base material showed microgalvanic coupling between precipitate and matrix, resulting in unstable surface layer. The processed alloy showed uniform corrosion owing to formation of stable surface film formation, due to the refined grains, texture, and distribution of precipitates. The results show promising potential of Mg alloyMagnesium alloys (Mg alloys)as biomaterialBiomaterials. © The Minerals, Metals & materials Society 2024.

关键词： Corrosion resistance

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Hybrid hydrovoltaic electricity generation driven by water evaporation

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Nano Research Energy 2024年第2期3卷 47-55页

作者： Xuemei Li Gu Feng Yiding Chen Jidong Li Jun Yin Wei Deng Wanlin Guo State Key Laboratory of Mechanics and Control of Mechanical Structures Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of EducationInstitute for Frontier ScienceNanjing University of Aeronautics and AstronauticsNanjing 210016China College of Material Science and Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Water evaporation is a ubiquitous natural process exploiting thermal energy from ambient *** technologies emerged in recent years offer one prospective route to generate electricity from water evaporation,which has long been ***,we developed a hybrid hydrovoltaic generator driven by natural water evaporation,integrating an“evaporation motor”with an evaporation-electricity device and a droplet-electricity device.A rotary motion of the“evaporation motor”relies on phase change of ethanol driven by water-evaporation induced temperature *** motion enables the evaporation-electricity device to work under a beneficial water-film operation mode to produce output of~4 V and~0.2μA,as well as propels the droplet-electricity device to convert mechanical energy into pulsed output of~100 V and~0.2 *** different types of hydrovoltaic devices require distinctive stimuli,it was challenging to make them work simultaneously,especially under one single driving *** here for the first time empower two types of hydrovoltaic devices solely by omnipresent water ***,this work presents a new pathway to exploiting water evaporation-associated ambient thermal energy and provides insights on developing hybrid hydrovoltaic generators.

关键词： hybrid hydrovoltaic generator ambient thermal energy evaporation motor water evaporation

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Six-degree-of-freedom Robot Trajectory Planning Based on MATLAB

Six-degree-of-freedom Robot Trajectory Planning Based on MAT...

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2022 International Conference on Automation, Robotics and Computer engineering, ICARCE 2022

作者： He, Zhengyang Li, Jingcheng Sichuan University Jinjiang College Mechanical Engineering College Meishan China Shanghai University of Engineering Science Material Science and Engineering College Shanghai China

ISBN: (纸本)9781665475488

With the development of science and technology in various countries, industrial robots have become a key research object in various countries. The study of trajectory and dynamics of industrial robots can help to improve robot efficiency. In this paper, the structure and DH parameters of KUKA six-degree-of-freedom industrial robot arm are analyzed, five spatial trajectory points are planned, and the corresponding joint angles are solved by using inverse kinematic numerical solution method. The trajectory planning of the industrial robot joint space is carried out by using the fifth polynomial interpolation method to the kinematic analysis and the inverse kinetic analysis are completed by using the Newton Euler method. This study provides a basis for the trajectory planning and dynamics Analysis of such robots. © 2022 IEEE.

关键词： Industrial robots

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