Materials Science eJournal最新文献_第4页

Designing Novel Anti-biofouling Coatings on Titanium based on the Ferroelectric-Induced Strategy 基于铁电致生策略的新型钛表面防生物污染涂层的设计

Materials Science eJournal Pub Date : 2021-02-14 DOI: 10.2139/ssrn.3805223

Ruoyu Wanga, Tong Zhou, Liu Jie, Xinwen Zhang, Jianfei Yang, Wenbin Hu, L. Lei

{"title":"Designing Novel Anti-biofouling Coatings on Titanium based on the Ferroelectric-Induced Strategy","authors":"Ruoyu Wanga, Tong Zhou, Liu Jie, Xinwen Zhang, Jianfei Yang, Wenbin Hu, L. Lei","doi":"10.2139/ssrn.3805223","DOIUrl":"https://doi.org/10.2139/ssrn.3805223","url":null,"abstract":"Abstract Biofouling originated from ubiquitous bacteria has affected quantities of practical applications, such as biomedical devices, biosensors and marine industry, thus the design for anti-biofouling coatings has aroused great concern in the scientific community. However, current anti-biofouling strategies based on either the release of biocidal compounds or surface textured/chemical design (superhydrophobic grille) cannot satisfy the practical demands when encountering real-world complex conditions. Here we, inspired by the ferroelectric/piezoelectric effect, report a refreshing strategy to prepare anti-biofouling coatings. The BaTiO3 particles are embedded in TiO2 coatings by micro-arc oxidation of pure titanium, and the obtained coatings have marvellous antifouling performance against Gram-negative E. coli. The contact potential differences (CPD) and reactive oxygen species (ROS) are successfully induced by the spontaneous polarization of micro/nano BaTiO3, and then the BaTiO3-incorporated TiO2 coatings (BaTiO3/TiO2) can effectively resist fouling organisms. Our experiments demonstrate that the ferroelectric effect of coatings plays a crucial role in the antimicrobial mechanism. It is therefore believed that our design strategy could also guide the development of other anti-biofouling materials and bring a new era to the marine antifouling.","PeriodicalId":18341,"journal":{"name":"Materials Science eJournal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83235677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Excellent Mechanical Properties and High Electrical Conductivity of Cu-Co-Si-Ti Alloy Due to Multiple Strengthening Cu-Co-Si-Ti复合强化合金的优异力学性能和高导电性

Materials Science eJournal Pub Date : 2021-02-09 DOI: 10.2139/ssrn.3782845

Y. Geng, Yijie Ban, Xu Li, Yi Zhang, K. Song, Yanlin Jia, B. Tian, Meng Zhou, Yong Liu, A. Volinsky

{"title":"Excellent Mechanical Properties and High Electrical Conductivity of Cu-Co-Si-Ti Alloy Due to Multiple Strengthening","authors":"Y. Geng, Yijie Ban, Xu Li, Yi Zhang, K. Song, Yanlin Jia, B. Tian, Meng Zhou, Yong Liu, A. Volinsky","doi":"10.2139/ssrn.3782845","DOIUrl":"https://doi.org/10.2139/ssrn.3782845","url":null,"abstract":"High performance copper alloys are widely used in electrical, electronic, aerospace fields welcomed due to their high electrical conductivity and excellent mechanical properties. At present work, we proposed a new class of Cu-Co-Si-Ti alloy by incorporating the multiple alloying elements, resulting in the multiple strengthening during heat treatment. The achievement of solution strengthening, deformation strengthening and dual-nanoprecipitation strengthening leaded to the Cu-Co-Si-Ti alloy with excellent tensile strength (617.9 MPa) and high electrical conductivity (41.7% IACS) by the optimum process of 50% cold rolling and aging at 500 °C for 30 min. EBSD was used to analyze the microstructure and texture evolution during the aging process. Moreover, it was found that the volume fraction of Goss, Brass, copper and S texture had close connections with the mechanical properties. By comparing with the contributions of multiple strengthening mechanisms, dual-nanoprecipitation strengthening contributed quite a lot due to the nanoprecipitation of Co2Si and Cu4Ti.","PeriodicalId":18341,"journal":{"name":"Materials Science eJournal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81976075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Scalable Polymeric Few-Nanometer Organosilica Membranes for Pre-Combustion CO 2 Capture 用于燃烧前co2捕获的可伸缩聚合少纳米有机硅膜

Materials Science eJournal Pub Date : 2021-02-02 DOI: 10.2139/ssrn.3778364

Lingxiang Zhu, Liang Huang, Surendar R. Venna, Adrienne K. Blevins, Yifu Ding, David P. Hopkinson, M. Swihart, Haiqing Lin

引用次数: 0

Immortally Dual Sites on Single-Atom Dispersed Electrocatalyst for High-Efficient Hydrogen/Oxygen Evolution Reaction 高效析氢/析氧反应的单原子分散电催化剂的不朽双位点

Materials Science eJournal Pub Date : 2021-01-21 DOI: 10.2139/SSRN.3770933

Huachuan Sun, Chine-Wei Tung, Yang Qiu, Wei Zhang, Qi Wang, Zhishan Li, Jiang Tang, Hsiao‐Chien Chen, Chundong Wang, Hao Ming Chen

{"title":"Immortally Dual Sites on Single-Atom Dispersed Electrocatalyst for High-Efficient Hydrogen/Oxygen Evolution Reaction","authors":"Huachuan Sun, Chine-Wei Tung, Yang Qiu, Wei Zhang, Qi Wang, Zhishan Li, Jiang Tang, Hsiao‐Chien Chen, Chundong Wang, Hao Ming Chen","doi":"10.2139/SSRN.3770933","DOIUrl":"https://doi.org/10.2139/SSRN.3770933","url":null,"abstract":"Real bifunctional electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) should be the ones that exhibit an immortal behavior during catalysis without structural transformation or surface reconstruction. Otherwise, they could be only termed as “pre-catalysts” rather than the real catalysts. Herein, single-atom dispersed catalysts (SACs) embedding atomically dispersed Ru onto nickel-vanadium layered double hydroxide matrix (termed as Ru/Ni3V-LDH) not only exhibit excellent HER activity (~ 54.3 fold mass activity vs. the commercial Pt/C) and OER activity, but also possess decent full-cell performance for overall water splitting (1.5 V@10 mA cm-2). Most importantly, in-situ XAS and Raman spectroscopic studies clarified that, unlike numerous bifunctional catalysts that have suffered from the structural reconstruction/transformation for adapting the HER/OER cycles, Ru/Ni3V-LDH is characteristic of immortally dual reactive sites (i.e., Ru and Ni sites) for individual catalysis of electrochemical water splitting and could be termed as the real bifunctional electrocatalyst.","PeriodicalId":18341,"journal":{"name":"Materials Science eJournal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88749561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of Tribological Behavior of GFRP Hybrid Composite Using Fly-Ash and Graphite as Filler Material 粉煤灰和石墨填充GFRP复合材料摩擦学性能研究

Materials Science eJournal Pub Date : 2021-01-18 DOI: 10.2139/ssrn.3768678

A. Parida, A. Nayak, S. K. Pattnaik, R. Bhuyan

{"title":"Study of Tribological Behavior of GFRP Hybrid Composite Using Fly-Ash and Graphite as Filler Material","authors":"A. Parida, A. Nayak, S. K. Pattnaik, R. Bhuyan","doi":"10.2139/ssrn.3768678","DOIUrl":"https://doi.org/10.2139/ssrn.3768678","url":null,"abstract":"In this paper, an attempt has been made to investigate the specific wear rate of the GFRP composite filled with graphite and fly-ash as filler material fabricated by hand lay-up process. Here the wt% of glass fiber is kept constant with 50% and matrix and filler are varied. Three different weight percentages such as 2wt%, 4wt% and 6wt% of filler materials added with 48wt%, 46wt% and 44wt% of epoxy resin respectively. The unlubricated pin-on-disc wear tests are conducted to examine the wear behavior of the GFRP composites. The testing parameters considered are wt% of filler material (%), applied load (N) and sliding distance (S). Specific wear rate is calculated in terms of weight loss of the sample. An orthogonal array and analysis of variance (ANOVA) are applied to investigate the influence of process parameters on the sliding wear behavior of the composites. The result shows that addition of graphite in the epoxy based hybrid composite enhances the capability of material to withstand against sliding wear. It is observed from the range of load and sliding distance in the study that the load has stronger effect on the specific wear rate than wt% of filler material and sliding distance. The weight loss of developed composite increases with an increase in normal applied load keeping the wt% of filler and sliding distance as constant.","PeriodicalId":18341,"journal":{"name":"Materials Science eJournal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86742348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Magnetic Properties and Microstructure of Sm 5Fe 17-Based Composite Magnets sm5fe17基复合磁体的磁性能与微观结构

Materials Science eJournal Pub Date : 2021-01-13 DOI: 10.2139/ssrn.3765774

I. Dirba, H. Sepehri-Amin, K. Skokov, Y. Skourski, K. Hono, O. Gutfleisch

{"title":"Magnetic Properties and Microstructure of Sm 5Fe 17-Based Composite Magnets","authors":"I. Dirba, H. Sepehri-Amin, K. Skokov, Y. Skourski, K. Hono, O. Gutfleisch","doi":"10.2139/ssrn.3765774","DOIUrl":"https://doi.org/10.2139/ssrn.3765774","url":null,"abstract":"We have investigated synthesis, magnetic properties and microstructure of Sm5Fe17-based hard magnetic phase with a Sm20Fe70Ti10 composition. Ultrahigh coercivities, μ0Hc=7.18 T at room temperature and μ0Hc=8.86 T at 10 K, have been achieved. The room-temperature coercivity, determined from high-field pulse measurements, reaches 35% of the anisotropy field μ0Ha=20.7±0.8 T. Further, it is demonstrated that a coercivity of 2.18 T is maintained even at 500 K. The Curie temperature TC of Sm20Fe70Ti10 is 577 K and the calculated exchange stiffness parameter A is 7.72 pJ/m. Detailed transmission electron microscopy investigations show a two-phase microstructure consisting of the Sm5Fe17-based hard magnetic matrix phase with grain size below 200 nm and finer, below 100 nm, Fe2Ti grains. Majority of the Fe2Ti phase is located at the grain boundaries with some finer inclusions found also inside the 5:17 grains. Despite the high fraction of the Fe2Ti grains, nearly single-phase demagnetization loops are observed. In order to enhance Ms, the effect of Ti content on phase constitution, magnetic properties and microstructure was studied in detail. Ms increases and Hc decreases for the Ti-lean compositions.","PeriodicalId":18341,"journal":{"name":"Materials Science eJournal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86167833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Recovery of Kink Boundaries During Post-Annealing of a Hot-Extruded Mg-Zn-Y Alloy 热挤压Mg-Zn-Y合金退火后扭结边界的恢复

Materials Science eJournal Pub Date : 2021-01-07 DOI: 10.2139/ssrn.3762197

D. Egusa, K. Inoue, Y. Nagai, E. Abe

引用次数: 0

Modulation of the Conductive Filament Growth During the Electroforming Process in Metal Oxide-Based RRAM 金属氧化物基RRAM电铸过程中导电丝生长的调制

Materials Science eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3855723

Kena Zhang, Yao Ren

{"title":"Modulation of the Conductive Filament Growth During the Electroforming Process in Metal Oxide-Based RRAM","authors":"Kena Zhang, Yao Ren","doi":"10.2139/ssrn.3855723","DOIUrl":"https://doi.org/10.2139/ssrn.3855723","url":null,"abstract":"Metal oxide-based Resistive Random-Access Memories (RRAM) exhibit multiple intermediate resistive states, due to the formation/rupture of a conductive filament (CF) inside a switching layer. While there have been extensive studies on the resistive switching behavior caused by a pre-existing CF, the initial stage of the formation and growth of a CF, i.e., the electroforming process has been less understood. In this work, we developed a physical model to fundamentally understand the formation and growth behavior of a CF in a metal oxide layer constrained by the top/bottom electrodes. It is revealed that the CF formation is assisted by the supply of oxygen vacancies at the anode and the oxygen vacancies transport in the oxide layer. The effects of the external conditions (the oxygen exchange rate j 0 and the applied voltage) and the physical properties of the oxides (the electrical σ and thermal conductivity k th ) on the CF morphology evolution, current density evolution, and local temperature and electrical potential distribution have been systematically explored. It is found that larger oxygen vacancy exchange rate and relatively small voltage sweep rate result in a more uniform CF. Furthermore, by choosing oxides with lower Lorenz number (ratio of k th and σ ), CF with more homogeneous morphology can be realized. This work provides a fundamental understanding of the kinetic behaviors of the CF formation and growth during the electroforming process, and could potentially guide the oxide and electrode materials selection, synthesis and working conditions for switching to achieve improved RRAM stability and functionality.","PeriodicalId":18341,"journal":{"name":"Materials Science eJournal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74923794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

ROS/NLRP3/Caspase-1 Pathway Contributes to TCP Particles-Induced Pyroptosis of Calvaria Osteocytes in the Mouse Osteolysis Model 在小鼠骨溶解模型中，ROS/NLRP3/Caspase-1通路参与TCP颗粒诱导的骨破骨细胞焦亡

Materials Science eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3799707

Yun Zhang, Ming Yan, Wanting Niu, Jian Fang, Hongjiao Mao, Yonghong Sun

{"title":"ROS/NLRP3/Caspase-1 Pathway Contributes to TCP Particles-Induced Pyroptosis of Calvaria Osteocytes in the Mouse Osteolysis Model","authors":"Yun Zhang, Ming Yan, Wanting Niu, Jian Fang, Hongjiao Mao, Yonghong Sun","doi":"10.2139/ssrn.3799707","DOIUrl":"https://doi.org/10.2139/ssrn.3799707","url":null,"abstract":"Wear particles-induced inflammatory osteolysis, a major contributing factor of aseptic loosening, affects long-term survival of orthopedic prostheses. Increasing observations have demonstrated that osteocytes death is involved in wear particles-induced periprosthetic osteolysis, but the underling molecular mechanisms remain unclear. We chose micro-sized tricalcium phosphate (TCP) particles to simulate TCP wear debris from loosened TCP implants, which have been widely used as bone substitute biomaterials in orthopedic and dental surgery for almost 40 years, and investigated the direct biological effects of the particles on calvaria osteocytes in vivo . Results showed that TCP wear particles triggered nod-like receptor protein 3 (NLRP3) inflammasome activation and pyroptosis in calvaria osteocytes, as indicated by increased osteocytes death, up-regulation of NLRP3, apoptosis-associated speck-like protein containing a CARD (ASC), cleaved Caspase-1 and interleukin (IL)-1β, elevation of IL-1β, IL-18 and lactic dehydrogenase (LDH), which were all inhibited by the Caspase-1 inhibitor VX765. Moreover, the NLRP3 inhibitor MCC950 reduced TCP particles-induced Caspase-1 cleavage, production of IL-18, IL-1β and LDH, and pyroptotic death in calvaria osteocytes. Further experiments revealed that the NLRP3-mediated pyroptosis pathway was mediated by reactive oxygen species (ROS) in TCP particles-induced cell death of calvaria osteocytes, since a ROS scavenger (N-acetyl-cysteine, NAC) efficiently prevented NLRP3 inflammasome activation and pyroptosis. Taken together, TCP wear particles induce pyroptosis of calvaria osteocytes through activation of ROS/NLRP3/Caspase-1 pathway, which is involved in osteoclastogenesis and periprosthetic osteolysis. Our findings strongly suggest that pyroptosis may play a significant role in wear particles-induced cell death of osteocytes and periprosthetic osteolysis, and will provide a novel evidence for elucidating its pathophysiology.","PeriodicalId":18341,"journal":{"name":"Materials Science eJournal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84820853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phase Stability and Mechanical Properties of N-Metallic Carbides n -金属碳化物的相稳定性和力学性能

Materials Science eJournal Pub Date : 2021-01-01 DOI: 10.2139/ssrn.3821951

S. Vorotilo, K. Sidnov, A. Sedegov, D. Moskovskikh

引用次数: 0