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Rare Metals 2024年第9期43卷 4367-4376页

作者： Wei Chen Ya-Hui Sun Tian Xu Xue-Bin Yu Guang-Lin Xia department of Materials Science Fudan University

2LiBH4-MgH2composite is one of the most attractive reactive hydride composites with a theoretic hydrogen capacity of 10.8 wt%.However,the large nucleation restriction of MgB2during the second step of dehydrogenation results in sluggish hydrogen storage kinetics and high operating temperature,which hinders its practical application as on-board hydrogen storage ***,Al3Ti doped Al nanoparticles （AT NPs） are prepared by a facile chemical reduction reaction to improve the hydrogen storage performance of *** the initial H2desorption process,MgAlB4and tib2that have identical crystal structure and low d-value mismatch with MgB2resulting from the reaction between AT NPs and 2LiBH4-MgH2composite serve as effective nucleation sites for the formation of *** a result,the apparent activation energy of the two-step H2desorption of AT NPs doped 2LiBH4-MgH2composite are notably decreased to （110.0±5.9） and（119.6±1.4） kJ·mol-1,which is 55.5 and 33.5 kJ·mol-1lower than that of the undoped *** importantly,a reversible hydrogen storage capacity of 9.2 wt%after 10cycles of H2desorption and adsorption could be achieved,corresponding to a capacity retention rate of 99%.The building of reactive bimetallic catalyst towards in situ formation of heterogeneous nucleation sites provides a new strategy for improving the hydrogen storage performance of reactive hydride composites.

关键词： Catalytic effects Heterogeneous nucleation Reactive hydride composites Reversible hydrogen storage

Scope for Prevention and Treatment of Hepatitis B with Herbal Medicine:A Systematic Review of Case Studies in Unani Medicine

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Food Therapy and Health Care 2021年第3期3卷 76-80页

作者： Mohd Usman Rubi Anjum Syeda Ayeman Mazhar Nazmeen Reader department of tahaffuzi wa samaji tib S.U.M.C Paryagraj India department of tahaffuzi wa samaji tib Ajmal Khan Tibbiya CollegeFaculty of Unani MedicineAligarh Muslim UniversityAligarhUttar PradeshIndia Regional Research Institute of Unani Medicine Naseem BaghKashmir UniversitySrinagar.India

Hepatitis is an inflammation of the liver caused by viral *** B(Serum Hepatitis)is an acute systemic *** is transmitted by parenteral route having a long incubation period six weak to six *** B virus can form a dangerous alliance with Delta *** B virus was discovered by *** is a complex,42 nm,double stranded DNA virus,originally known as *** B is a blood borne *** is transmitted by infected blood *** in this paper an attempt is made to review the Unani concept,causes,sign and symptoms,management and treatment of hepatitis B *** successful case studies of the hepatitis B management through unani formulations and particular regimen have been incorporated to showcase the efficacy of the unani system of medicine in this chronic disease.

关键词： vaccination kabid liver Unani Dane particle hepatitis B

Spark Plasma Sintering of Boron Carbide Using Ti_(3)SiC_(2) as a Sintering Additive

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Journal of Wuhan University of Technology(Materials Science) 2024年第3期39卷 645-650页

作者： Hülya Biçer Mustafa Tuncer Hasan Göçmez Iurii Bogomol Valerii Kolesnichenko Andrey Ragulya Kutahya Dumlupinar University School of EngineeringDepartment of Metallurgical and Materials EngineeringKütahya 43100Tur-key Boron Based Advanced Ceramics Application and Research Center Kütahya Dumlupınar UniversityKütahya 43100Turkey Advanced Technologies Center(İLTEM) Kütahya Dumlupınar UniversityKütahya 43000Turkey department of High-Temperature Ma-terials and Powder Metallurgy National Technical University of Ukraine“Igor Sikorsky Kyiv Polytechnic Institute”Kyiv 03056Ukraine Frantsevich Institute for Problems of Materials Science National Academy of Sciences of UkraineKyiv 03056Ukraine

Boron carbide has unique properties for wide application possibilities;however,poor sinterability limits its *** approach to overcome this limitation is the addition of secondary phases into boron *** carbide based composite ceramics are produced by the direct addition of secondary phases into the structure or via reactive sintering using a sintering *** present study investigated the effect of Ti_(3)SiC_(2) addition to boron carbide by reactive spark plasma sintering in the range of 1700-1900℃.Ti_(3)SiC_(2) phase decomposed at high temperatures and reacted with B4C to form secondary phases of tib2 and *** results demonstrated that the increase of Ti_(3)SiC_(2) addition(up to 15 vol%)effectively promoted the densification of B4C and yielded higher ***,as the amount of Ti_(3)SiC_(2) increased further,the formation of microstructural inhomogeneity and agglomeration of secondary phases caused a decrease in hardness.

关键词： reactive sintering SPS boron carbide MAX phase

Mechanical performance of 22SiMn2tib steel welded with lowtransformation- temperature filler wire and stainless steel filler wire

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Journal of Iron and Steel Research(International) 2024年第4期31卷 967-981页

作者： Zi-dong Lin Kai-jie Song Zhen Sun Zi-qian Zhu Xue-feng Zhao Constantinos Goulas Wei Ya Xing-hua Yu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China department of Design Production and Management Faculty of Engineering Technology.University of TwenteEnschede 7500 AETheNetherlands Rotterdam Additive Manufacture Fieldlab(RAMLAB) Rotterdam 3089 JWTheNetherlands

TX-80 low-transformation-temperature(LTT)welding wire was used to replace the traditional ER 307Si welding wire to realize the connection of 22SiMn2tib armor steel in manual overlay *** previously existing issues,such as welding cracks,large welding deformation,and severe welding residual stress,were solved to ensure good strength and ductility *** particular,with the same welding conditions,TX-80 LTT wire eliminates welding *** reduces the welding deformation no matter the base pretreatment of pre-setting angle or no pre-setting *** comparison,it was found that the microstructure at the TX-80 weld is mainly composed of martensite and a small amount of retained *** contrast,the microstructure of the ER 307Si weld consists of a large amount of austenite and a small amount of skeleton-like *** variation trend of residual stress and microhardness from the weld to the base were investigated and compared with the mechanical properties of base *** TX-80 and the ER 307Si tensile samples elongation is 6.76%and 6.01%,while the ultimate tensile strengths are 877 and 667 MPa,*** average impact toughness at room temperature of the ER 307Si weld is 143.9 J/cm^(2),much higher than that of the TX-80 weld,which is only 36.7 J/cm^(2).The relationship between impact and tensile properties with microstructure species and distribution was *** addition,the fracture surface of the tensile and the impact samples was observed and *** dimples,fewer pores,larger radiation zone,and shear lips of TX-80 samples indicate better tensile ductility and worse impact toughness than those of ER 307Si weld.

关键词： Low-transformation-temperature material 22SiMn2tib steel Welding deformation Residual stress Martensitic transformation Mechanical property

Canonical Workflow for Experimental Research

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Data Intelligence 2022年第2期4卷 155-172页

作者： Dirk Betz Claudia Biniossek Christophe Blanchi Felix Henninger Thomas Lauer Philipp Wieder Peter Wittenburg Martin Zunkeler tib-Leibniz Information Centrefor Science and Technology Welfengarten 1B30167 HannoverGermany Center for Empirical Research in Economics and Behavioral Sciences(CEREB) University of ErfurtNordhauser Str.6399089 ErfurtGermany DONA Foundation C/O Universitede GeneveRuedu General-Dufour 241204 GeneveSwitzerland Statistics and Data Science in Social Sciences and the Humanities Department of StatisticsLudwig-Maximilians-University MunchenLudwigstr.3380539 MunchenGermany GWDG Burckhardtweg 437077 GotingenGermany FDO Forum Gemeindeweg 5547533 KleveGermany 7KAIROS Bochum UniversitatsstraBe 13644799 BochumGermany

The overall expectation of introducing Canonical Workflow for Experimental Research and FAIR digital objects(FDOs)can be summarised as reducing the gap between workflow technology and research practices to make experimental work more efficient and improve FAIRness without adding administrative load on the *** this document,we will describe,with the help of an example,how CWFR could work in detail and improve research *** have chosen the example of"experiments with human subjects"which stretches from planning an experiment to storing the collected data in a *** we focus on experiments with human subjects,we are convinced that CWFR can be applied to many other data generation processes based on *** main challenge is to identify repeating patterns in existing research practices that can be abstracted to create *** this document,we will include detailed examples from different disciplines to demonstrate that CWFR can be implemented without violating specific disciplinary or methodological *** do not claim to be comprehensive in all aspects,since these examples are meant to prove the concept of CWFR.

关键词： Experiments Experimental economics FAIR digital objects Information science FAIR research output

Distribution and effects of polymorphic RANTES gene alleles in HIV/HCV coinfection - A prospective cross-sectional study

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World Journal of Gastroenterology 2005年第48期11卷 7631-7638页

作者： Golo Ahlenstiel Agathe Iwan Jacob Nattermann Karin Bueren Jürgen K Rockstroh Hans H Brackmann Bernd Kupfer Olfert Landt Amnon Peled Tilman Sauerbruch Ulrich Spengler Rainer P Woitas department of Internal Medicine 1 Institute of Experimental Hematology Institute of Medical Microbiology and Immunology tib MOLBIOL Synthesis Laboratory Goldyne Savad Institute of Gene Therapy

AIM: Chemokines and their receptors are crucial for immune responses in HCV and HIV infection. RANTES gene polymorphisms lead to altered gene expression and influence the natural course of HIV infection. Therefore,these mutations may also affect the course of HIV/HCV ***: We determined allele frequencies of RANTES-403 (G→A), RANTES-28 (C→G) and RANTESIN1.1 (T→C) polymorphisms using real-time PCR and hybridization probes in patients with HIV (n = 85), HCV (n= 112), HIV/HCV coinfection (n = 121), and 109 healthy controls. Furthermore, HIV and HCV loads as well as CD4+ and CD8+ cell counts were compared between different RANTES ***: Frequencies of RANTES-403 A, RANTES-28 G and RANTES-IN1.1 C alleles were higher in HIV infected patients than in healthy controls (-403: 28.2% vs 15.1%,P = 0.002; -28: 5.4% vs 2.8%, not significant; IN1.1:19.0% vs 11.0%, P = 0.038). In HIV/HCV coinfected patients, these RANTES alleles were less frequent than in patients with HIV infection alone (15.4% P = 0.002;1.7%; P = 0.048; 12.0%; not significant). Frequencies of these alleles were not significantly different between HIV/HCV positive patients, HCV positive patients and healthy ***: All three RANTES polymorphisms showed increased frequencies of the variant allele exclusively in patients with HIV monoinfection. The finding that the frequencies of these alleles remained unaltered in HIV/HCV coinfected patients suggests that HCV coinfection interferes with selection processes associated with these alleles in HIV infection.

关键词： RANTES 基因多态性爱滋病丙型肝炎病毒

Effect of spark plasma sintering and reinforcements on the formation of ultra-fine and nanograins in AA2024-tib2-Y hybrid composites

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Progress in Natural Science:Materials International 2022年第1期32卷 79-86页

作者： CH.Suresh Vidyasagar D.B.Karunakar department of Architecture and Planning Indian Institute of Technology Roorkee Mechanical and Industrial Engineering department Indian Institute of Technology Roorkee

This study reports the influence of sintering mechanism and reinforcement materials on the formation of ultra-fine and nanograins in Al-tib-Y nanohybrid composites. The mechanical properties of the composites and their corresponding micro and nanostructures are correlated. The experimental and characterization results revealed that despite the addition of tib, the hard and brittle AlTi phase formation in the composites was suppressed and hence, their ductility was retained. It was found that yttrium content of 0.3 wt% was the optimum amount which created advantageous spark plasma sintering conditions, and the addition of 0.3 wt% promoted the formation of bi-modal size grains（ultra-fine and nano） along with micro grains, Ω and other nano precipitates, resulting in a significant enhancement in the composite properties. The formation of ultra-fine and nanograins may be attributed to the combined effect of melting and rapid solidification at necking zones due to Joule’s heating and thermomechanical fatigue. Among all the sintered composites, the highest hardness（137 HV）, ultimate tensile strength（UTS）(496 MPa), yield strength（YS）(438 MPa) with 15.7% elongation were obtained in the sintered sample reinforced with 1.0 wt% tiband 0.3 wt% yttrium.

关键词： Hybrid composites Ultra-fine grains Nano grains Spark plasma sintering Nano precipitates Microstructure

High-strength and thermally stable tib2-modified Al–Mn–Mg–Er–Zr alloy fabricated via selective laser melting

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International Journal of Minerals,Metallurgy and Materials 2024年第10期31卷 2221-2232页

作者： Jiang Yu Yaoxiang Geng Yongkang Chen Xiao wang Zhijie Zhang Hao Tang Junhua Xu Hongbo Ju Dongpeng wang School of Materials Science and Engineering Jiangsu University of Science and Technology Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology Beijing National Engineering Research Center of Near-Net Shape Forming for Metallic Materials Guangdong Provincial Key Laboratory for Processing and Forming o Advanced Metallic MaterialsSouth China University of Technology CEMMPRE-Centre for Mechanical Engineering Materials and Processes Department of Mechanical EngineeringUniversity of Coimbra

To increase the processability and plasticity of the selective laser melting （SLM） fabricated Al–Mn–Mg–Er–Zr alloys,a novel tib2-modified Al–Mn–Mg–Er–Zr alloy with a mixture of Al–Mn–Mg–Er–Zr and nano-tib2powders was fabricated by *** processability,microstructure,and mechanical properties of the alloy were systematically investigated by density measurement,microstructure characterization,and mechanical properties *** alloys fabricated at 250 W displayed higher relative densities due to a uniformly smooth top surface and appropriate laser energy *** maximum relative density value of the alloy reached （99.7±0.1）%demonstrating good *** alloy exhibited a duplex grain microstructure consisting of columnar regions primarily and equiaxed regions with tib2,Al6Mn,and Al3Er phases distributed along the grain *** directly aging treatment at a high temperature of 400°C,the strength of the SLM-fabricated tib2/Al–Mn–Mg–Er–Zr alloy increased due to the precipitation of the secondary Al6Mn *** maximum yield strength and ultimate tensile strength of the aging alloy were measured to be （374±1） and （512±13）MPa,*** SLM-fabricated tib2/Al–Mn–Mg–Er–Zr alloy demonstrates exceptional strength and thermal stability due to the synergistic effects of the inhibition of grain growth,the incorporation of tib2nanoparticles,and the precipitation of secondary Al6Mn nanoparticles.

关键词：

High-temperature deformation behaviors of Ti-2Al-9.2Mo-2Fe alloy with boron

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Rare Metals 2023年第5期42卷 1695-1705页

作者： Rong Chen Song-Xiao Hui Wen-Jun Ye Yang Yu Xu-Jun Mi Dong-Geun Lee Yong-Tai Lee State Key Laboratory for Nonferrous Metal and Processing General Research Institute for Nonferrous MetalsBeijing100088China department of Materials Metallurgical Engineering Sunchon National UniversitySunchon57922Korea department of Nano New Materials Kyungnam UniversityChangwon51767Korea

Hot deformation behaviors of Ti-2Al-9.2Mo-2Fe alloy with boron were investigated in a hot compression test at temperatures ranging from 850 to 1000℃and strain rates ranging from 0.01 to 10.00 s^(-1).With strain rate decreasing and deformation temperature increasing,dynamic recrystallization(DRX)was promoted in both *** nucleation mechanism of DRX involved grain boundary bulging and subgrain *** case of deformation at low temperatures and high strain rates,the boronfree alloy only showed dynamic recovery(DRV)***,due to the particle-stimulated nucleation mechanism of recrystallization by tib particles,the boron-containing alloy shows DRX at that *** DRX grain nuclei are formed by lattice rotation and subgrain growth from deformation zone in the initial grains,which are close to those of tib ***,the flow stress of the boron-containing alloy is lower than that of the boron-free alloy due to the grain refinement during hot deformation process.

关键词： Newβtitanium alloy Boron addition Hot deformation Particle-stimulated nucleation Dynamic recrystallization

Investigation into machining performance of microstructurally engineered in-situ particle reinforced magnesium matrix composite

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Journal of Magnesium and Alloys 2023年第3期11卷 916-935页

作者： S.K.Sahoo B.N.Sahoo S.K.Panigrahi department of Mechanical Engineering Indian Institute of Technology MadrasChennai 600036India Applied Magnesium Research Group Center of Excellence in Materials and Manufacturing for Futuristic MobilityIndian Institute of Technology MadrasChennai 600036India department of Mechanical Engineering Sardar Vallabhbhai National Institute of TechnologySurat 395007India

Magnesium and magnesium in-situ composites have significant potential in the application of design and manufacturing for automotive and aerospace industries because of their high specific strength and reduced fuel *** there are many challenges for machining of Mg based alloys and composites because of the high tendency of fire and *** challenges can be minimized through microstructural *** this present study,the machining performances of AZ91 Mg alloy and in-situ hybrid TiC+tib_(2)reinforced AZ91 metal matrix composite was *** effectβ-Mg_(17)Al_(12)phases and grain refinement with and without in-situ particles on machinability were studied through microstructural engineering via aging and friction stir *** end milling operation was carried out at different cutting speeds ranging from 25 mm/min to 90 mm/min under dry environment by using an AlTiN-coated tungsten carbide *** optimum cutting speed for machining was found to be 75 mm/min based on the surface roughness values of all conditioned *** base material with dendritic microstructure was found to have poor machinability in terms of inadequate surface finish and edge-burrs *** combined effect of in-situ TiC+tib_(2)particles addition and grain refinement enhanced the machining performance of the material with superior surface finish,negligible edge-burr formation and better tool wear *** influence of in-situ TiC+tib_(2)particles,β-Mg_(17)Al_(12)phases and grain refinement on machining characteristics are explained based on the tool wear mechanisms,chip behavior and machining induced affected zone.

关键词： Magnesium In-situ composite End-milling Tool wear Chip morphology