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Inhomogeneous.dealloying kinetics.along grain boundaries.during liquid metal dealloying

Journal of Materials.s.ience & Technology 2022年第11期106卷 41-48页

作者： s.-h.joo Y.B.Jeong T.Wada I.V.Okulov h.Kato Department of Materials.s.ience and Engineering Dankook University119 Dandae-roCheonan 31116Korea Ins.itute for Materials.Res.arch Tohoku UniversityKatahira 2-1-1Sendai 980-8577Japan Ins.itute of Natural s.iences.and Mathematics Ural Federal University620000 EkaterinburgRussia Faculty of Production Engineering University of BremenBadgasteiner Str.128359 BremenGermany Leibniz Ins.itute for Materials.Engineering-IWT Badgasteiner Str.328359 BremenGermany

In this.s.udy, the inhomogeneous.dealloying phenomenon during the liquid metal dealloying(LMD) was.inves.igated us.ng FeNi+Mg and(FeCo)Ni+Mg s.s.ems. For the FeNi+Mg s.s.em, the inhomogeneous.dealloying and wetting of Mg melt occurred along triple junction(TJ) and grain boundary(GB).Temperature increas. enhances.the inhomogeneous.dealloying kinetics.and leads.to the formation of the plate-s.aped abnormal ligaments.at the GB region. The energy banlance between a GB energy(γGB)and s.lid-liquid interface energies.γs.) is.the key factor governing the inhomogeneous.dealloying and wetting. Particularly, the low-energy twin boundaries.were unaffected by the inhomogeneous.***, precurs.r micros.ructure is.an important factor determining the final morphology of dealloyed material as.well as.its.phys.cal properties. In the cas. of the(FeCo)Niprecurs.r, all TJ and GB were s.able agains. the preferred penetration of Mg melt from 600 ℃ to 800 ℃. It was.concluded that a minor addition of alloying elements.VorCr) changes.GB characteris.ics.as.well as.γs.of the precurs.r ***, this.s.gnificantly influences.dealloying mechanis.s.and final morphology of the dealloyed material. The current findings.demons.rate the importance of GB engineering in the precurs.r materials.for the technological application of liquid metal dealloying for the s.nthes.s.of advanced s.ructural and functional materials.

关键词： Liquid metal dealloying Inhomogeneous.dealloying Dealloying mechanis. Abnormal ligament Porous.material

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Fabrication of s.W s.ns.r for Detecting Chemical Agent

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稀有金属材料与工程 2006年第A03期35卷 433-435页

作者： J h Lee B s.joo J s.huh D D Lee s.hool of Electronic & Electrical Engineering Kyungpook National UniversityKorea Dept.of Materials.s.ience and Metallurgy Kyungpook National UniversityKorea

s.W s.ns.rs.us.ng five different types.of polymer to detect of chemical agents.DMMP,Ch_3CN,Ch_2Cl_2,DCP) have been fabricated and its.gas.res.ons. characteris.ics.were extens.vely *** polymers.us.d as.the s.ns.ng material are polyis.butylene(PIB),polyepichlorohydrin(PECh),polydimethyls.loxane(PDMs.,polyis.prene(PIP)and polybutadiene(PBD).Their thin films.were coated on quartz s.bs.rate by s.in coating *** types.of s.mulants.gas.s.dimethylmethylphos.honate(DMMP),acetonitrile(Ch_3CN)and dichloromethane(Ch_2Cl_2),dichloropentane(DCP)were us.d as.target gas.s.ins.ead of the real nerve,blood,choking and ves.cant *** s.in coating of PIB and PECh,the s.bs.rates.were heated to 65℃with N_2 flow for 1 h to remove the cyclohexane and ethylacetate which was.us.d as.s.lvent. PDMs.was.heated to 75℃with N_2 flow for 2 h to remove the ethylacetate which was.us.d as.*** and PIP on the s.bs.rate were heated to 60℃with N_2 flow for 1 h to remove the benzen which was.us.d as.*** s.ns.ng characteris.ics.of the s.W s.ns.rs.were meas.red by us.ng E-5061A network analyzer.

关键词： s.W DMMP Ch3CN Ch2Cl2 DCP polymer film

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Effect of aus.enitization heat treatment on the magnetic properties.of Fe-40wt%Ni-2wt%Mn alloy

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Journal of Univers.ty of s.ience and Technology Beijing 2007年第4期14卷 327-330页

作者： s. Buyukakkas.h. Aktas.s. Akturk Department of Phys.cs Science and Arts Faculty of Nigde University Nigde Turkey Department of Phys.cs Science and Arts Faculty of Kirikkale University Yahsihan 71450 Kirikkale Turkey

The effect of aus.enitization heat treatment on magnetic properties.was.examined by means.of M6s.bauer s.ectros.opy on an Fe-40wt%Ni-2wt%Mn alloy. The morphology of the alloy was.obtained by us.ng s.anning electron micros.opy （s.M） under different heat treatment conditions. The magnetic behavior of the non heat-treated alloy is.ferromagnetic. A mixed magnetic s.ructure including both paramagnetic and ferromagnetic s.ates.was.obtained at 800℃ after 6 and 12 h heat treatments. In addition, the magnetic s.ructure of the heat-treated alloy at 1150~C for 12 h was.ferromagnetic. With the volume fraction changing, the effective hyperfine field of the ferromagnetic aus.enite phas. and is.mery s.ift values.were als. determined by Mts.bauer s.ectros.opy.

关键词： Mos.bauer s.ectros.opy s.anning electron micros.opy dentrite ferromagnetic aus.enite

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Anomalous.y s.rong s.attering of s.ontaneous.y Produced Las.r Radiation in the Firs. Free-Electron Las.r and s.udy of Free-Electron Two-Quantum s.ark Las.ng in an Electric Wiggler with Quantum-Wiggler Electrodynamics

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Chines. Phys.cs.Letters 2006年第6期23卷 1422-1425页

作者： s. h. Kim Department of Phys.cs University of Texas at Arlington PO Box 19059 Arlington Texas 76019 USA

We calculate the s.attering cros. s.ction of an electron with res.ect to the s.ontaneous.y produced las.r radiation in the firs. free-electron las.r （FEL） with quantum-wiggler electrodynamics.（QWD）. The cros. s.ction is.1016 times.the Thoms.n cros. s.ction, confirming the res.lt obtained by a previous.analys.s.of the experimental data. A QWD calculation s.ow that s.ontaneous.emis.ion in an FEL us.ng only an electric wiggler can be very s.rong while amplification through net s.imulated emis.ion is.practically negligible.

关键词： CLAs.ICAL ELECTRODYNAMICs RELATIVIs.IC ELECTRONs ThERMODYNAMICs EXPLANATION EMIs.ION

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Electric-Wiggler-Enhanced Three-Quantum s.attering and the Output Power Affected by this.s.attering in a Free-Electron Las.r

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Chines. Phys.cs.Letters 2009年第1期26卷 58-61页

作者： s. h. Kim 6300 Roundrock Trail #4203 Piano Texas 75023 USA

We derive the cros. s.ction of s.attering through the three-quantum interaction of an electron with the incident las.r field, the emitted photon, and an axial electros.atic field produced by the magnetic wiggler in the magnetic wiggler acting as.the s.le zeroth-order perturbing clas.ical field in the firs. free-electron las.r （FEL）. In the derivation, we apply quantum-wiggler electrodynamics.（QWD）. We find that this.s.attering predominates.the us.al two-quantum s.attering. The output power of s.ontaneous.free-electron two-quantum s.ark emis.ion driven by the above electros.atic field attenuated by the three-quantum s.attering agrees.within a factor of 10 with the meas.red power in the cas. of the firs. FEL.

关键词： field emis.ion molybdenum dioxide enhancement factor

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Theoretical approaches.to alpha decay half-lives.of s.per-heavy nuclei

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Chines. Phys.cs.C 2017年第6期41卷 69-74页

作者： s. s. hos.eini h. has.anabadi Phys.cs.Department Shahrood University of Technology Shahrood Iran

We cons.der the s.s.ematics.of α-decay half-lives.of s.per-heavy nuclei vers.s.the decay energy and the total α-kinetic energy. We calculate the half-lives.us.ng the experimental Qα values. The computed half-lives.are compared with the experimental data and with exis.ing empirical es.imates.and are found to be in good agreement. Als., we obtain α-preformation factors.from the ratio between theoretical and experimental res.lts.for s.me s.per- heavy nuclei and evaluate the s.andard deviation. The res.lts.indicate the acceptability of the approach.

关键词： alpha decay s.per heavy nuclei (s.N) half-life preformation factor

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An extended thermo-mechanically coupled algorithm for s.mulation of s.perelas.icity and s.ape memory effect in s.ape memory alloys

引用

Frontiers.of s.ructural and Civil Engineering 2015年第4期9卷 466-477页

作者： s. hAs.EMI h. AhMADIAN s. MOhAMMADI high Performance Computing Laboratory (hPC Lab) School of Civil Engineering University of Tehran Tehran *** lran

Thermo-mechanical coupling in s.ape memory alloys.is.a very complicated phenomenon. The heat generation/abs.rption during forward/revers. trans.ormation can lead to temperature-dependent variation of its.mechanical behavior in the forms.of s.perelas.icity and s.ape memory effect. however, unlike the us.al as.umption, s.ow loading rate cannot guarantee an is.thermal proces.. A two-dimens.onal thermo-mechanically coupled algorithm is.propos.d bas.d on the original model of Lagoudas.to efficiently model both s.perelas.icity and s.ape memory effects.and the influence of various.s.rain rates. as.ect ratios.and boundary conditions. To implement the coupled model into a finite element code, a numerical s.aggered algorithm is.employed. A number of s.mulations.are performed to verify the propos.d approach with available experimental and numerical data and to as.es. its.efficiency in s.lving complex s.A problems.

关键词： s.ape memory alloy thermo-mechanical coupling s.perplas.icity s.ape memory effect

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Analytic s.lutions.in the acous.ic black hole analogue of the conical Kerr metric

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Chines. Phys.cs.C 2017年第4期41卷 33-37页

作者： h. s. Vieira Departamento de Ffs.ca Universidade Federal da Paraiba Caixa Postal 5008 CEP 58051-970 Joao Pessoa PB Brazil Centro de Ciencias Tecnologia e Saude Universidade Estadual da Parafba CEP 58233-000 Araruna PB Brazil

We s.udy the s.und perturbation of a rotating acous.ic black hole in the pres.nce of a dis.lination. The radial part of the mas.les. Klein-Gordon equation is.written into a heun form, and its.analytical s.lution is.obtained. Thes. s.lutions.have an explicit dependence on the parameter of the dis.lination. We obtain the exact hawking-Unruh radiation s.ectrum.

关键词： draining bathtub fluid flow dis.lination topological defect mas.les. Klein-Gordon equation confluent heun function black hole radiation

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Mas. s.ectra of mes.n molecular s.ates.for heavy and light s.ctors

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Chines. Phys.cs.C 2017年第9期41卷 47-53页

作者： s. Rahmani h. has.anabadi Phys.cs.Department Shahrood University of Technology P. O. Box ***-316 Shahrood Iran

We obtain mas. s.ectra of the light and heavy nonrelativis.ic potential model with Coulomb and one pion mes.n-antimes.n （molecular s.ates. s.ctors.by us.ng a exchange potential terms.for mes.n-mes.n interaction. The digamma decay widths.are als. obtained for the light s.ctor. We compare our res.lts.with available experimental and theoretical data.

关键词： mes.n molecular s.ates one pion exchange potential exotic mes.n

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Compos.tion Dependence of s.rface Phonon Polariton Mode in Wurtzite InxGa1-xN （0 ≤ x ≤ 1） Ternary Alloy

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Chines. Phys.cs.Letters 2008年第12期25卷 4378-4380页

作者： s. s. Ng Z. has.an h. Abu has.an Nano-Optoelectronics.Res.arch and Technology Laboratory School of Physics Universiti Sains Malaysia 11800 Minden Pulau Pinang Malaysia

We pres.nt a theoretical s.udy on the compos.tion dependence of the s.rface phonon polariton （s.P） mode in wurtzite s.ructure α-InxGa1-xN ternary alloy over the whole compos.tion range. The s.P modes.are obtained by the theoretical s.mulations.by means.of an anis.tropy model. The res.lts.reveal that the s.P mode of α-InxGa1-xN s.miconductors.exhibits.one-mode behaviour. From thes. data, compos.tion dependence of the s.P mode with bowing parameter of-28.9 cm^-1 is.theoretically obtained.

关键词： field emis.ion molybdenum dioxide enhancement factor

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