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structural & Magnetic Characterizations of niLizn nanoferrites synthesized by Co-precipitation Method

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journal of Materials science & Technology 2011年第11期27卷 991-995页

作者： D.n. Rohadiana z.A.z. jamal s.B. jamaludin M.F. Bari j. Adnan sustainable Engineering Research Cluster Universiti Malaysia Perlis school of Microelectronic Engineering Universiti Malaysia Perlis

synthesis of ***（0.5-x）Fe204 nanoparticles with x=0, 0.1, 0.2, 0.3, 0.4 and 0.5 were realized via coprecipitation method. X-ray diffraction （XRD） and vibrating sample magnetometer （VsM） measurements were performed on the samples to determine the characteristics of the crystal structures and the magnetic properties of the samples, respectively. The spinel phase structures of the samples were confirmed by XRD analysis. Patterns of decreased lattice parameter and increased crystallite size values were observed by increasing the Li concentration at longer synthesis reaction periods. similarly, for the magnetic properties, both the saturation magnetization （Ms） and coercivity （Hc） were found to vary with increasing patterns at higher Li doping levels and longer synthesis reaction periods. The results and mechanisms concerned were discussed.

关键词： Lithium nickel zinc ferrite Co-precipitation Crystal structure Magnetic properties

Tensile ductility and deformation mechanisms of a nanotwinned 316L austenitic stainless steel

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journal of Materials science & Technology 2020年第1期36卷 65-69页

作者： Y.z.zhang j.j.Wang n.R.Tao shenyang national Laboratory for Materials science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China school of Materials science and Engineering University of Science and Technology of ChinaHefei 230026China University of Chinese Academy of sciences Beijing 100049China

A nanotwinned 316 L austenitic stainless steel was prepared by means of surface mechanical grinding *** recovery annealing,the density of dislocations decreases obviously while the average twin/matrix lamella thickness still keeps in the nanometer *** annealed nanotwinned sample exhibits a high tensile yield strength of 771 MPa and a considerate uniform elongation of 8%.TEM observations showed that accommodating more dislocations and secondary twinning inside the nanotwins contribute to the enhanced ductility and work hardening rate of the annealed nanotwinned sample.

关键词： nanotwinned stainless steel Ductility Deformation mechanism

Human Toxicosis Caused by Moldy Rice Contaminated with Fusarium and T-2 Toxin

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Biomedical and Environmental sciences 1993年第1期6卷 65-70页

作者： z G Wang j n Feng z Tong zhejiang Institute of Food safety Control and Inspection Hangzhou China.

This is the first report on human toxicosis in China caused by moldy rice contaminated with Fusarium and T-2 toxin due to heavy rainfall during rice harvest season. One hundred and sixty-five persons ate the moldy rice and ninety-seven persons fall ill of food poisoning. The incidence was 58.8% and latent period was 10-30 min. The chief symptoms were nausea, dizziness, vomiting, chills, abdominal distension, abdominal pain, thoracic stuffiness and diarrhea. The fungi isolated from the moldy rice were predominantly Fusarium heterosporum (F. heterosporum) and F. graminearum. T-2 toxin was found in these moldy rice and the highest level was 420 ppb. The chief causative agent of intoxication was T-2 toxin.

关键词：

PREPARATIOn AnD CORROsIOn REsIsTAnCE OF niP/TiO_2 COMPOsITE FILM On CARBOn sTEEL In sULFURIC ACID sOLUTIOn

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Acta Metallurgica sinica(English Letters) 2006年第2期19卷 117-123页

作者： L.z. song s.z. song j. zhao school of Environment ＆ Chemical Engineering Yanshan University Qinhuangdao 066004 China school of Materials science and Engineering Tianjin University Tianjin 300072 China

A niP/TiO2 composite film on carbon steel was prepared by electroless plating and sol-gel composite process. An artificial neural network was applied to optimize the prepared condition of the composite film. Corrosion behavior of the niP/TiO2 composite film was investigated by polarization resistance measurement, anode polarization, EsEM （environmental scanning electron microscopy） and EIs （electrochemical impedance spectroscopy） measurements. Results showed that the niP/ TiO2 composite film has a good corrosion resistance in 0.5mol/L H2sO4 solution. The element valence of the composite film was characterized by XPs （X-ray photoelectron spectroscopy） spectrum, and an anticorrosion mechanism of the composite film was discussed.

关键词： electroless plating and sol-gel composite process artificial neural network niP/TiO2 composite film corrosion resistance

Effect of surface Polishing Treatment on the Fatigue Performance of shot-Peened Ti–6Al–4V Alloy

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Acta Metallurgica sinica(English Letters) 2017年第7期30卷 630-640页

作者： z.G.Liu T.I.Wong W.Huang n.sridhar s.j.Wang Institute of High Performance Computing A＊STAR 1 Fusionopolis Way Singapore 138632 Singapore Institute of Materials Research and Engineering A＊STAR 2 Fusionopolis Way Singapore 138634 Singapore

In this study, shot peening is applied to the titanium alloy Ti–6Al–4V, and the surface treatment effect on fatigue life of shot-peened specimens under high cycle loading is investigated. The induced residual stress is measured by using the orbital hole-drilling method. surface profilometer and optical microscopy are employed to characterize the surface roughness and morphology. The deformed microstructure layers of the shot-peened specimens are investigated by using scanning electron microscopy. Experiments reveal that the fatigue life of Ti–6Al–4V is improved by the shot peening process, and the surface pre-peening polishing. The combination of pre-and post-peening polishing treatments further improves fatigue life of Ti–6Al–4V specimens. The present work provides useful guidelines for developing more efficient shot peening strategies.

关键词： shot peening surface polishing treatment Fatigue Residual stress Ti–6Al–4V alloy

Deciphering deformation mechanisms of hierarchical dual-phase CrConi coatings

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journal of Materials science & Technology 2020年第4期39卷 7-13页

作者： s.j.Tsianikas Y.Chen.z.Xie school of Mechanical Engineering The University of AdelaideAdelaideSA5005Australia Centre for Advanced Thin Film Materials and Device Faculty of Materials and EnergySouthwest UniversityChongqing400715China school of Engineering Edith Cowan UniversityWA6027Australia

Hierarchical Cr Co ni medium entropy alloy(MEA)thin films with a dual-phase face-centred cubic(FCC)and hexagonal closed-packed(HCP)nanostructure were prepared on M2 steel substrates by closed field unbalanced magnetron *** tests show an ultra-high hardness of 9.5 GPa,attributable to large amounts of innate planar defects(i.e.,growth twins and stacking faults)impeding dislocation motion in the coatings.A deep analysis of undeformed and post-mortem samples reveals grain refinement as the dominant deformation mechanism in FCC dominated regions,while phase transformation and shear banding played major roles in regions occupied by HCP *** grain refinement was facilitated by twin/matrix lamellae,with dislocations piling up and arranging into interconnecting grain *** shear banding was accelerated by innate planar defects in the HCP phase due to a lack of slip *** particular interest is the observation of HCP→FCC phase transformation,which was catalysed by deformation-induced grain reorientation with innate stacking faults acting as embryos to grow the FCC *** results of this work suggest that multiple deformation pathways could be activated in Cr Co ni coatings with assistance of growth defects,thereby imparting these technically important coatings appreciable ductility.

关键词： Medium entropy alloys sputter deposition Grain refinement shear banding Phase transformation

Preparation of an adsorptive membrane of polyvinylidene fluoride incorporated functionalized boron nitride nanosheets for arsenic removal

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Chinese journal of Chemical Engineering 2024年第12期76卷 49-63页

作者： s.selambakkannu n.L.Ishak n.M.Fauzi n.Ismail z.A.Karim Radiation Processing Technology Division Malaysia Nuclear AgencyBangiKajang 43000Malaysia Advanced Membrane Technology Research Centre(AMTEC) Faculty of Chemical and Energy EngineeringUniversiti Teknologi MalaysiaSkudaiJohor81310Malaysia

Incorporating nanomaterials into membranes will enhance wastewater treatment efficiency with their unique characteristics,such as higher permeability,thermal stability,surface roughness,hydrophilicity,and fouling *** this study,the surface-modified boron nitride with phosphoric acid 2-hydroxyethyl methacrylate ester(PA/Bn)was grafted with polyethylene glycol(PEG)via conventional *** PEG grafted PA/Bn(PEG-g-PA/Bn)melt blended with polyvinylidene fluoride(PVDF)resin by using an internal mixer at different mass percentages 100%PVDF(PVDF),3%PEG-g-PA/Bn+97%PVDF(97:3 Bn),5%PEG-g-PA/Bn+95%PVDF(95:5 Bn),7%PEG-g-PA/Bn+93%PVDF(93:7 Bn),and 7%PEG-g-PA/Bnns+93%PVDF(93:7 Bnns).Phase inversion technique was used to cast the blended mixture into a thin *** prepared membranes were analyzed with different characterization techniques to determine chemical composition,crystallinity,morphology,and thermal *** prepared composite membrane was evaluated in terms of water permeability,anti-fouling resistance,and solute rejection efficiency with deion.zed water,bovine serum albumin,and arsenic solution as *** membranes show high water flux and *** water flux and porosity of the blends decrease as the percentage of PEG-g-PA/Bn ***,the highest removal capacity for arsenic was observed at 93:7 *** adsorption of arsenic ions takes place via complexation with PA/Bn in the PVDF *** was confirmed with field emission scanning electron microscopyeenergy-dispersive X-ray analysis and X-ray photoelectron spectroscopy analyses.

关键词： Adsorption Ultrafiltration Preparation Membranes

Cytogenetical Changes among Polyembryonic(PEm)and non-PEm Maize Plants

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Phyton-International journal of Experimental Botany 2021年第1期90卷 87-97页

作者： A.A.Román-Calzoncit F.Ramírez-Godina j.sánchez-Laureano A.C.Flores-Gallegos j.Espin.za-Velázquez R.Rodríguez-Herrera school of Chemistry Universidad Autónoma de Coahuila.Blvd.V.Carranza e Ing.JoséCárdenas V.s/n.Col.República Ote.C.P.25280.SaltilloCoahuilaMéxico Plant Breeding Department Universidad Autónoma Agraria Antonio NarroBlvd.Antonio Narro 1923BuenavistaSaltilloMéxico

Polyembryony in maize(PEm)contributes to improving the nutritional properties of the grain,as well as an increase in yield,since it generates multiple plants per seed,opening the possibility of developing new ***,it is unknown whether polyembryony in maize is the product of chromosomal *** on the above,in this research a cytogenetic study was proposed to verify if chromosomal abnormalities are related to the maize *** a meiotic study,maize genotypes with variable proportions of polyembryony(PEm),from the UA-IMM-BAP population and non-PEm(monoembryonic)maize were used,while for a mitosis analysis,30 families of maternal half-siblings(MHs)from two different populations with high polyembryony,denominated as BHP(brachytic,high polyembryony)and nHP(normal height,high polyembryony)were *** these genotypes were planted in the Buenavista Agricultural Experimental station-UAAAn at saltillo,Coahuila,*** frequency of PEm was estimated in all *** was found that the polyembryony occurs at frequencies from 34 to 66%in the D-02,BHP group,and from 13 to 21%in the segregating groups of the G3-0202 and *** squash technique was used for both cytogenetic *** meiotic irregularities in maize chromosomes were detected,such as irregular association of 10%of chromosomes in metaphase 1,and agglomeration of chromatin in 100%of the *** addition,pollen viability was estimated by the staining technique with 1%acetocarmine dye,and it was found that the polyembryonic ones have pollen viability of 100%.In meiosis in prophase,I sub-phase diakinesis,ten pairs of bivalents were confirmed,confirming 2n=20,both in non-PEm and PEm maize,corroborating mating,and balanced segregation,without the presence of univalent or *** the chromosomal count carried out in cells in mitosis,only in the BHP-200 polyembryonic family was registered two out of twenty triploid *** condition of ploidy is atypical in

关键词： zea mays irregular meiosis mitosis chromosomes chromatin polyploidy

structure, formation, and decay of ■nn system by Faddeev-AGs calculations

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Chinese Physics C 2019年第6期43卷 21-31页

作者： s.Marri s.z.Kalantari j.Esmaili Department of Physics Isfahan University of TechnologyIsfahan 84156-83111Iran Department of Physics Faculty of Basic Sciences Shahrekord UniversityShahrekord115Iran

The Faddeev AGs equations for the coupled-channels ■nn-πΣn system with quantum numbers I=1/2 and s=0 are solved. Using separable potentials for the ■n-πΣ interaction, we calculate the transition probability for the(YK)I=0 + n→πΣn reaction. The possibility to observe the trace of the K-pp quasi-bound state in πΣn mass spectra was studied. Various types of chiral-based and phenomenological potentials are used to describe the ■n-πΣ interaction. Finally, we show that we can observe the signature of the K-pp quasi-bound state in the mass spectra, as well as the trace of branch points in the observables.

关键词： Faddeev method ■n interaction K^-pp system quasi-bound state