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Heavy Metal Adsorption Properties of Marine Algae Durvilliea Potatorum,Ecklonia Radiata and Laminaria Japonica

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Chinese Journal of Chemical Engineering 1998年第1期6卷 72-76页

作者：虞启明 Jose T.Matheickal jozef Latten School of Environmental Engineering Griffith University

1 INTRODUCTIONBiosorption of heavy metals using biosorbents derived from suitable biomass is a new tech-nology for the removal and recovery of heavy metals from industrial waste *** ad-vantages of the biosorption technology include rapid reduction of dissolved heavy metal ionsconcentration to 10-6and 10-9levels,use of inexpensive and non-hazardous biosorbents,useof existing adsorption process equipment and therefore low operating costs,high uptake ca-pacity and specificity for selective heavy metal removals,and low interference from

关键词： biosorption heavy metal removal marine algae

Uncovering the Genetic Networks Driving Stomatal Lineage Development

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Molecular Plant 2020年第10期13卷 1355-1357页

作者： Despina Samakovli George Komis jozef(S)amaj Centre of the Region Hanáfor Biotechnological and Agricultural Research Faculty of SciencePalack(y)University Olomouc(S)lechtitel(u)2778371 OlomoucCzech Republic

Recent studies on stomatal ontogenesis and function provided important insights into plasticity strategies that plants employ to optimize their development by balancing their requirements for carbon and water under diverse environmental *** on stomata progressed from physiological and cell biological approaches for the identification of important regulatory genes by genetic tools to recent isolation of stomatal guard cells by different techniques in order to analyze their transcriptomic and proteomic ***,development of the stomatal lineage appeared as an appealing model to study cell identity,division,and morphology pattems in plants.

关键词： insight covering balancing

Prediction of the Isothermal Sections in the ZrO_(2)- YO_(1.5)-CeO_(2) System

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Journal of Materials Science & Technology 2001年第5期17卷 529-534页

作者： LinLI Shuigen HUANG Luoping XU Omer Van Der Biest jozef Vleugels Dept.of Materials Science and Engineering Shanghai UniversityShanghai 200072China Dept.of Materials and Metallurgy Katholieke Universiteit LeuvenB-3001 HeverleeBelgium

The experimental work on the ZrO2-YO1.5-CeO2 system, it limiting quasi-binaries and previous thermodynamic assessments are reviewed and evaluated. Isothermal sections of the ZrO2-YO1.5-CeO2 system in the temperature region between 1450 and 1800°C are estimated according to the substitutional model using the Bonnier equation. The CSS+YSS two-phase region of the calculated isothermal section at 1700°C was found to be in good agreement with the experimentally obtained ternary diagram of Longo and Podda. However, the phase composition in the ZrO2-rich corner disagreed with it significantly.

关键词： Soc CALPHAD CeO2 System Prediction of the Isothermal Sections in the ZrO2-YO

Manufacturing size effect on the structural and mechanical properties of additively manufactured Ti-6Al-4V microbeams

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Journal of Materials Science & Technology 2023年第18期149卷 18-30页

作者： Kaiyang Yin Bo Cao Juraj Todt Florian Gutmann Hasan Furkan Tunçay Antonina Roth Frank Fischer Nadira Grübel Aron Pfaff Georg C.Ganzenmüller jozef Keckes Stefan Hiermaier Christoph Eberl Department of Microsystems Engineering University of FreiburgFreiburgGermany Cluster of Excellence livMatS@FIT-Freiburg Center for Interactive Materials and Bioinspired Technologies University of FreiburgFreiburgGermany Chair of Materials Physics Montanuniversität LeobenLeobenAustria INATECH University of FreiburgFreiburgGermany Fraunhofer Ernst-Mach Institut EMIFreiburgGermany Fraunhofer IWM FreiburgGermany

The size effect of Ti-6Al-4V submillimeter structures manufactured by selective laser melting,which is critical for metallic mechanical metamaterials of unique mechanical properties,for example,nega-tive Poisson’s ratio and ultrahigh modulus,which show promise in biomedical,environmental,energy-related applications,has not been systematically *** here are the quantification of the porosities by X-ray microtomography scans,texture analysis,and mechanical characterization of the addi-tively manufactured Ti-6Al-4V *** found linearly decreasing porosities,increasing mechan-ical properties,and increasing texture in the microbeam with increasing diameter from 250 to 500μ*** variation of microstructure in microbeams of different diameters and along the sample height,result-ing from the printing parameters and the thermal conditions,leads to the discrepancy between the be-havior observed in experiments and finite element *** results provide the structure-property-processing correlation to improve the manufacturing and prediction of the mechanical behavior of metal-lic mechanical metamaterials.

关键词： Selected laser melting Porosity Texture Epitaxial growth Finite element modeling Metallic mechanical metamaterials

Verification of Cutting Zone Machinability during Drilling of Austenitic Stainless Steels

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Verification of Cutting Zone Machinability during Drilling o...

Sintering, thermal stability and mechanical properties of ZrO2-WC composites obtained by pulsed electric current sintering

International Conference on Experimental Mechanics 2008 (ICEM 2008)

作者： jozef Jurko Department of Production Technology Faculty of Production TechnologyTechnical University of KoicePreovSlovakia

＜正＞Automated production of,in the sense of,machine production has characteristic features:a reduction of production costs,stimulation of the development of cutting tools,and changes in the construction of machine t... 详细信息

关键词： drilling cutting process screw drill fracture fatigue stainless steels

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Frontiers of Materials Science 2011年第1期5卷 50-56页

作者： Shuigen HUANG Kim VANMEENSEL Omer VAN DER BLEST jozef VLEUGELS Department of Metallurgy and Materials Engineering Katholieke Universiteit Leuven Kasteelpark Arenberg 44 B-3001 Heverlee Belgium

ZrO2-WC composites exhibit comparable mechanical properties as traditional WC-Co materials, which provides an opportunity to partially replace WC-Co for some applications. In this study, 2 mol.% Y2O3 stabilized ZrO2 composites with 40 vol.% WC were consolidated in the 1150℃-1850℃ range under a pressure of 60 MPa by pulsed electric current sintering （PECS）. The densification behavior, microstructure and phase constitution of the composites were investigated to clarify the role of the sintering temperature on the grain growth, mechanical properties and thermal stability of ZrO2 and WC components. Analysis results indicated that the composites sintered at 1350℃ and 1450℃ exhibited the highest tetragonal ZrO2 phase transformability, maximum toughness, and hardness and an optimal flexural strength. Chemical reaction of ZrO2 and C, originating from the graphite die, was detected in the composite PECS for 20 min at 1850℃ in vacuum.

关键词： ceramic composite pulsed electric current sintering (PECS) grain size,mechanical property

Relationship between the rock mass deformation and places of occurrence of seismological events

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Mining Science and Technology 2009年第5期19卷 580-584页

作者： MAKOWKA Janusz KABIESZ jozef DOU Lin-ming Central Mining Institute Katowice 40-166 Poland School of Mines China University of Mining ＆ Technology Xuzhou Jiangsu 221116 China

Static effort of rock mass very rarely causes of rock burst in polish coal mines. Rock bursts with source in the seismic tremor within the roof rock layers are prevailing. A seismic tremor is an effect of rupture or sliding in roof layers above the exploited panel in coal seam, sometime in a distance from actual exploitation. Sliding, as a rule occurs in fault zone and tremors in it are expected, but monolithic layer rupture is very hard to predict. In a past few years a practice of analyzing state of deformation in high energy seismic tremors zones has been employed. It let gathering experience thanks to witch determination of dangerous shape of reformatted roof is possible. In the paper some typical forms of roof rocks deformations leading to seismic tremor occurrence will be presented. In general these are various types of multidirectional rock layers bending. Real examples of seismic events and rock bursts will be shown.

关键词：地震事件岩体变形岩层破裂地震断裂带岩石层煤层开采变形状态能量分析

Degradable magnesium-hydroxyapatite interpenetrating phase composites processed by current assisted metal infiltration in additive-manufactured porous preforms

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Journal of Magnesium and Alloys 2022年第12期10卷 3641-3656页

作者： Mariano Casas-Luna Edgar B.Montufar Norbert Hort Sebastian Díaz-de-la-Torre JoséClaudio Méndez-García Lucie Vištejnová Adam Brínek AlešDanhel Karel Dvorak jozef Kaiser Ladislav Celko Central European Institute of Technology Brno University of TechnologyPurkynova 123Brno 61200Czech Republic Institute of Metallic Biomaterials Helmholtz-Zentrum HereonMax-Planck-Straße 1Geesthacht 21502Germany Institute of Product and Process Innovation Leuphana University LüneburgUniversitätsallee 1Lüneburg 21335Germany Centro de Investigación e Innovación Tecnológica Instituto Politécnico NacionalCerrada de Cecati s/nMexico City 02250Mexico Biomedical Center Faculty of Medicine in PilsenCharles UniversityAlej Svobody 1655/76Plzen 32300Czech Republic Institute of Biophysics of the Czech Academy of Sciences Královopolská135Brno 61265Czech Republic Faculty of Civil Engineering Brno University of TechnologyPurkynova 139Brno 61200Czech Republic

This work explores ceramic additive manufacturing in combination with liquid metal infiltration for the production of degradable interpenetrating phase magnesium/hydroxyapatite(Mg/HA) composites. Material extrusion additive manufacturing was used to produce stoichiometric,and calcium deficient HA preforms with a well-controlled open pore network, allowing the customization of the topological relationship of the composite. Pure Mg and two different Mg alloys were used to infiltrate the preforms by means of an advanced liquid infiltration method inspired by spark plasma sintering, using a novel die design to avoid the structural collapse of the preform. Complete infiltration was achieved in 8 min, including the time for the Mg melting. The short processing time enabled to restrict the decomposition of HA due to the reducing capacity of liquid Mg. The pure Mg-base composites showed compressive yield strength above pure Mg in cast state. Mg alloy-based composites did not show higher strength than the bare alloys due to grain coarsening, but showed similar mechanical properties than other Mg/HA composites that have significantly higher fraction of metallic phase. The composites showed faster degradation rate under simulated body conditions than the bare metallic component due to the formation of galvanic pairs at microstructural level. Mg dissolved preferentially over HA leaving behind a scaffold after a prolonged degradation period. In turn, the fast production of soluble degradation products caused cell metabolic changes after 24 h of culture with not-diluted material extracts. The topological optimization and reduction of the degradation rate are the topics for future research.

关键词： Interpenetrating phase composite Biodegradable metal Topological relationship Direct ink writing Metal infiltration Computed aided design

Achieving exceptional wear resistance in a crack-free high-carbon tool steel fabricated by laser powder bed fusion without pre-heating

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Journal of Materials Science & Technology 2023年第25期156卷 1-19页

作者： Konrad Kosiba Daniel Wolf Matthias Bönisch Kai Neufeld Ruben Hühne Tobias Gustmann jozef Bednarčík Hongyu Chen Xiaoliang Han Volker Hoffmann Lukas Beyer Uta Kühn Sergio Scudino Lars Giebeler Julia K.Hufenbach Leibniz Institute for Solid State and Materials Research (IFW) Dresden E.V. Helmholtzstr. 20Dresden 01069Germany Department of Materials Engineering KU LeuvenKasteelpark Arenberg 44bus 2450Leuven 3001Belgium Department of Condensed Matter Physics Institute of PhysicsP.J. Safarik University in KosicePark Angelinum 9Kosice 04154Slovakia Institute of Experimental Physics Slovak Academy of ScienceWatsonova 47Kosice 040 01Slovakia Key Laboratory of Impact and Safety Engineering of Ministry of Education of China Ningbo UniversityNingbo 315211China TU Bergakademie Freiberg Institute of Materials ScienceGustav-Zeuner-Str. 5Freiberg 09599Germany

Laser powder bed fusion(LPBF)for the fabrication of dense components used for tooling applications,is highly *** stresses,which evolve in the additively manufactured part,are inherent to LPBF *** additional stress contribution in high-carbon steels arises from the austenite-to-martensite phase transformation,which may eventually lead to cracking or even *** an alternative to pre-heating the base plate,which is not striven by industry,lowering the martensite content which forms in the part,is essential for the fabrication of dense parts by LPBF of high-carbon tool steels which are then adapted to *** this study,a successful strategy demonstrates the processing of the Fe85Cr4Mo1V1W8C1(wt%)high-carbon steel by LPBF into dense parts(99.8%).The hierarchical microstructure consists of austenitic and martensitic grains separated by elemental segregations in which nanoscopic carbide particles form a network.A high density of microsegregation was observed at the molten pool boundary ultimately forming a *** LPBF-fabricated steel shows a yield strength,ultimate compressive stress,and total strain of 1210 MPa,3556 MPa,and 27.4%,*** mechanical and wear performance is rated against the industrially employed and highly wear-resistant 1.2379 tool steel taken as the *** its lower macro-hardness,the LPBF steel(58.6 HRC,0.0061 mm^(3) Nm^(-1))shows a higher wear resistance than the reference steel(62.6 HRC,0.0078 mm^(3) Nm^(-1)).This behavior results from the wear-induced formation of martensite in a microscale thick layer directly at the worn surface,as it was proven via high-energy X-ray diffraction mapping.

关键词： Additive manufacturing Laser powder bed fusion Steel Wear TRIP