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In-situ l.ading neutron-diffraction studies of a cobal.-based superal.oy

中国有色金属学会会刊：英文版 2006年第A2期16卷 144-148页

作者： M. l. BENSON P. K l.AW H. CHOO T. A. SAl.H D. W. BROWN M. R. DAYMOND x. l. wang A. D. STOICA E. C. Ol.VER D. l. Kl.RSTROM Department of Material. Science and Engineering University of Tennessee Knoxville TN 37996 USA Metal. and Ceramics Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA l.s Al.mos Neutron Science Center Los Alamos National Laboratory Los Alamos NM 87545 USA Department of Mechanical.and Material. Engineering Queen＇s University Kingston ON K7L3N6 Canada Spal.ation Neutron Source Oak Ridge National Laboratory Oak Ridge TN 37831 USA ISIS Pul.ed Neutron and Muon Source Rutherford-Appleton Laboratory Chilton Didcot OX 11 0QX UK Haynes International.Inc Kokomo IN 46904 USA

Ul.IMET® al.oy is a cobal.-based superal.oy that undergoes a deformation-induced phase transformation from a face-centered-cubic (fcc) phase to a hex.gonal.cl.se-packed (hcp) phase. The transformation was studied during monotonic l.ading, stress-control.ed high-cycl. fatigue (HCF) and strain-control.ed l.w-cycl. fatigue (l.F). The HCF was performed at a max.mum stress of σmax./sub>=840 MPa and a minimum stress of σmin=84 MPa, whil. the tensil. ex.eriment was terminated after reaching σmax./sub>=890 MPa. The l.F was performed at a max.mum strain of σmax./sub>=1.25% and a minimum strain of σmin=-1.25%. The monotonic-l.ading ex.eriment resul.s reveal.that the hcp phase forms after reaching the yiel. stress. During HCF, the hex.gonal.phase forms immediatel. upon the first fatigue cycl., with no further change in structure upon subsequent deformation. In contrast to HCF, the hcp phase forms gradual.y during l.F. In fact, fatigue cycl. 12 is reached before the hcp phase is resol.ed by neutron diffraction. Diffraction patterns from subsequent fatigue cycl.s reveal.that the hcp phase continues to accumul.te as l.F progresses. These observations can be rel.ted to the input of mechanical.energy during different l.ading modes.

关键词：钴基高温合金现场加载中子衍射 fcc hcp 相变

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Force and impul.e mul.i-sensor based on fl.x.bl. gate diel.ctric fiel. effect transistor

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International.Journal.of Mineral.,Metal.urgy and Material. 2025年第1期32卷 214-220页

作者： Chao Tan Junl.ng l. Chunchi Zhang Dong l.ang l.i Yang Zegao wang Col.ege of Material. Science and Engineering Sichuan UniversityChengdu 610065China The 54th Research Institute of China El.ctronics Technol.gy Group Corporation Shijiazhuang 050081China

Nowadays,force sensors pl.y an important rol. in industrial.production,el.ctronic information,medical.heal.h,and many other ***-dimensional.material.based fil.d effect transistor(2D-FET)sensors are competitive with nano-l.vel.size,l.wer power consumption,and accurate ***,few of them has the capabil.ty of impul.e detection which is a path function,ex.ressing the cumul.tive effect of the force on the particl. over a period of *** we fabricated the fl.x.bl. pol.methyl.methacryl.te(PMMA)gate diel.ctric MoS_(2)-FET for force and impul.e sensor *** systematical.y investigated the responses of the sensor to constant force and varying forces,and achieved the conversion factors of the drain current signal.(I_(ds))to the detected impul.e(I).The appl.ed force was detected and recorded by I_(ds)with a l.w power consumption of~30 *** sensitivity of the device can reach~8000%and the 4×1 sensor array is abl. to detect and l.cate the normal.force appl.ed on ***,there was al.ost no performance l.ss for the device as l.ft in the air for two months.

关键词： fl.x.bl. gate diel.ctric transistor force sensor impul.e sensor force sensor array

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B2-CuZr reinforced amorphous al.oy matrix.composites:A review

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China Foundry 2025年第1期22卷 1-11页

作者： Wei Guo Run-hua Huang Zhen Zhang Mi Zhao Jin-cheng wang Yan-qiang Qiao Shu-l.n l. Shu-sen Wu State Key l.b of Material. Processing and Die&Moul. Technol.gy School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key l.boratory of Sol.dification Processing Northwestern Polytechnical UniversityXi’an 710072China School.of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China Research Institute of Huazhong University of Science and Technol.gy in Shenzhen Shenzhen 518057GuangdongChina

B2-CuZr phase reinforced amorphous al.oy matrix.composites has become one of the research hotspots in the fiel. of material. science due to the“transformation-induced pl.sticity”phenomenon,which makes the composites show better macroscopic pl.stic deformabil.ty and obvious work-hardening behavior compared to the conventional.amorphous al.oy matrix.composites reinforced with ductil. ***,the in-situ metastabl. B2-CuZr phase tends to undergo eutectoid decomposition during sol.dification,and the vol.me fraction,size,and distribution of B2-CuZr phase are difficul. to control.which l.mits the devel.pment and appl.cation of these *** date,much efforts have been made to sol.e the above probl.ms through composition optimization,casting parameter tail.ring,and post-processing *** this study,a review was given based on rel.vant studies,focusing on the predictive approach,reinforcing mechanism,and microstructure tail.ring methods of B2-CuZr phase reinforced amorphous al.oy matrix.*** research focus and future prospects were al.o given for the future devel.pment of the present composite system.

关键词： amorphous al.oy matrix.composite B2-CuZr phase pl.sticity microstructure tail.ring

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Heterogeneousl. integrated sil.con-conductive ox.de MOSCAP microring modul.tor array

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Photonics Research 2025年第01期13卷 187-193页

作者： WEI-CHE HSU SAEED ABDOl.OSSEINI HAISHENG RONG RANJEET KUMAR BERND ZECHMANN Al.N x.wang Department of El.ctrical.and Computer Engineering Baylor University School.of El.ctrical.Engineering and Computer Science Oregon State University Intel.Corporation Center of Microscopy and Imaging Baylor University

In pursuit of energy-efficient optical.interconnect, the sil.con microring modul.tor（Si-MRM） has emerged as a pivotal.device offering an ul.ra-compact footprint and capabil.ty of on-chip wavel.ngth division mul.ipl.x.ng（WDM）. This paper presents a 1 × 4 metal.ox.de-semiconductor capacitor（MOSCAP） Si-MRM array gated by high-mobil.ty titanium-doped indium ox.de（ITi O）, which was fabricated by combining Intel.s high-vol.me manufacturing process and the transparent conductive ox.de（TCO） patterning with the university facil.ty. The 1 × 4 Si-MRM array ex.ibits a high el.ctro-optic（E-O） efficiency with Vπ· l.of 0.12 V · cm and achieves a modul.tion rate of（3 × 25 + 1 × 15） Gb/s with a measured bandwidth of 14 GHz. Additional.y, it can perform on-chip WDM modul.tion at four equal.y spaced wavel.ngths without using thermal.heaters. The process compatibil.ty between sil.con photonics and TCO material. is verified by such an industry-university co-fabrication approach for the MOSCAP Si-MRM array and demonstrated enhanced performance from heterogeneous integration.

关键词： Modul.tion Optical.interconnects Optical.signal. Sil.con modul.tors Sil.con photonics Wavel.ngth division mul.ipl.x.ng

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Effective diffusivity of a Janus sphere in an ex.ernal.fiel.

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Appl.ed Mathematics and Mechanics(Engl.sh Edition) 2025年第3期46卷 539-554页

作者： Tianyu YUAN l.P.l.U Jianx.ang wang Institute for Advanced Study Chengdu University Department of Mechanical.and Aerospace Engineering Rutgers University Department of Mathematics Rutgers University Department of Mechanics and Engineering Science College of EngineeringPeking University

During nearl. 200 years of devel.pment in the knowl.dge of Brownian motion, the Janus sphere, as a typical.Brownian particl. with special.surface properties, has been widel. studied in the past few decades. A standard Janus sphere possesses two distinct surfaces. These two surfaces el.cit different hydrodynamic interactions with ambient fl.ids or other interactions in response to environmental.stimul., such as chemical.gradients, magnetic fiel.s, and even l.ght. The diffusion of Janus spheres, particul.rl. when control.ed by a remotel. appl.ed fiel., has inspired various appl.cations, ranging from the design of micro-swimmers and novel.procedures for probing the mechanical.properties of suspensions to the fabrication of composites with enhanced performance. In this work, we report a systematic anal.sis of fiel.-control.ed diffusion of Janus spheres. Commencing with stochastic differential.equations of motion at the microscal., we derive a coarse-grained Fokker-Pl.nck equation at the macroscal., describing the evol.tion of the probabil.ty distribution function of the Janus sphere in terms of its position and orientation. l.veraging the concept of the hydrodynamic center, we derive, for the first time,ex.l.cit general.zed Stokes-Einstein rel.tions for l.ng-time effective diffusivity, incorporating the effects of both the surface discontinuity of the Janus sphere and the ex.ernal.fiel.s. The formul.e enabl. predictions of the effective diffusivity as it varies with the sl.p l.ngth and characteristic angl. of Janus spheres, and reveal.the impact of an al.gning potential.fiel. on the diffusion coefficients both paral.el.and perpendicul.r to the direction of the fiel.. This work not onl. deepens the understanding of fiel.-control.ed diffusion of Janus particl.s, but al.o hol.s a meaningful.impact on the future appl.cations in microfl.idics and rel.ted fiel.s.

关键词： Distribution functions

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Structural.characteristics and formation process of pseudotachyl.te in the Wul.an detachment faul. zone on the Jiaodong Peninsul.， China

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Journal.of Earth Science 2025年

作者： Ruijie wang Jinl.ng Ni Guiyuan l. Junl.i l.u l.i Ji Yiren wang Runye l. School.of Earth Sciences and Engineering， Shandong University of Science and Technol.gy Qingdao Geol.gic and Mineral.Geotechnical.Engineering Co.， l.d. State Key l.boratory of Geol.gical.Processes and Mineral.Resources， China University of Geosciences(Beijing) l.boratory for Marine Mineral.Resources，Qingdao Marine Science and Technol.gy Center

Ex.l.ring pseudotachyl.tes (PSTs) within detachment faul. zones provides val.abl. insight into the kinematic processes of these faul. systems. Neverthel.ss， significant controversy persists regarding the origin and formation mechanisms of PST veins. The PST was initial.y identified within the Wul.an detachment faul. zone (DFZ) on the Jiaodong Peninsul. by del.neating the deformation characteristics of the faul. zone's transition from ductil. to ductil.-brittl. behavior. Macroscopic and microstructural.features of the PST within the Wul.an DFZ were ex.mined using geol.gical.fiel. surveys. Using quantitative and high-resol.tion techniques， such as scanning el.ctron microscopy， TIMA-x.mineral.composition anal.sis， and transmission el.ctron microscopy， variations in mineral.composition between the veins and detrital. of the PST were investigated. Furthermore， this study has investigated the progressive deformation processes and underl.ing causes contributing to PST formation within the DFZ. This study reveal.d the presence of both type D and B-type PSTs in the Wul.an DFZ formed under ductil. or ductil.-brittl. conditions. These PSTs ex.ibit fracture and fusion structures resul.ing from faul. frictional.fragmentation and frictional.mel.ing and undergo progressive deformation. During the initial.stages of the D-type PST formation， biotite fragmentation in poorl. cohesive fol.ation was the primary contributor， suppl.mented by frictional.mel.ing. As the deformation progressed， quartz fragmentation and partial.mel.ing became dominant， constituting up to 81.9% of the matrix. The formation of the B-type PST al.gns with deformation under brittl. or ductil.-brittl. conditions， with frictional.fragmentation and fragmentation fl.w pl.ying significant rol.s. Vein formation is initiated by biotite fragmentation or partial.mel.ing， fol.owed by quartz， potassium fel.spar， al.ite fragmentation， or partial.mel.ing. Mature PST veins ex.ibited distinct zoning characteristics， with a diffu

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Assessment of the dietary amino acid profil.s and the rel.tive biomarkers for amino acid bal.nce in the l.w-protein diets for broil.r chickens

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Journal.of Animal.Science and Biotechnol.gy 2025年第1期16卷 238-266页

作者： Bin wang x.aodan Zhang Yongfa l.u Mingkun Gao Mi wang Yuan wang x.nzhi wang Yuming Guo State Key l.boratory of Animal.Nutrition and Feeding College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Shenyang Boeing Feed Company Shenyang 110141China

Background Research on l.w-protein-l.vel.diets has indicated that even though the profil.s of essential.amino acids(EAAs)fol.ow the recommendation for a normal.protein-l.vel.diet,broil.rs fed l.w-protein diets fail.d to achieve pro-ductive performance compared to those fed normal.***,it is imperative to reassess the optimum profil. of EAAs in l.w-protein diets and establ.sh a new ideal.pattern for amino acid ***,identifying novel.sensitive biomarkers for assessing amino acid bal.nce wil. greatl. facil.tate the devel.pment of amino acid nutrition and appl.cation *** this study,12 dietary treatments[Con(+),Con(-),l.A(-),l.A(+),M&C(-),M&C(+),BCAA(-),BCAA(+),Thr(-),Thr(+),Trp(-)and Trp(+)]were establ.shed by combining different EAAs incl.ding l.sine and argi-nine,methionine and cysteine,branched-chain amino acid(BCAA),threonine,and tryptophan to observe the growth and devel.pment of the broil.r chickens fed with l.w-protein-l.vel.*** on the biochemical.parameters and untargeted metabol.mic anal.sis of animal. subjected to different treatments,biomarkers associated with opti-mal.and suboptimal.amino acid bal.nce were *** Growth performance,carcass characteristics,hepatic enzyme activity,serum biochemical.parameters,and breast muscl. mRNA ex.ression differed significantl. between mal. and femal. broil.rs under different dietary amino acid *** broil.rs ex.ibited higher sensitivity to the adjustment of amino acid patterns than femal. *** the l.w-protein diet,the dietary concentrations of l.sine,arginine,and tryptophan,but not of methionine,cystine,or threonine,needed to be ***,further research on individual.BCAA is *** untar-geted metabol.mic anal.sis,Con(+)was sel.cted as a normal.diet(NP)whil. Con(-)represented a l.w-protein diet(l.).l.A(+)denotes a l.w-protein amino acid bal.nced diet(l.AB)and Thr(+)represents a l.w-protein amino acid imbal.nce diet(l.AI).The metabol.

关键词： Amino acid bal.nce Biomarkers Essential.amino acid l.w-protein diet Metabol.mics

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Control.ed cationic ring-opening pol.merization of l.l.ctide by organic ion pair:novel.approach to isotactic-rich and crystal.ine pol.l.ctide

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Science China Chemistry 2025年第1期68卷 394-402页

作者： Zhiqiang Ding Mingqian wang Zijing Zhou Bin wang Yuesheng l. Tianjin Key l.boratory of Composite&Functional.Material. School of Materials Science and EngineeringTianjin UniversityTianjin 300350China

l.ving/control.ed cationic ring-opening pol.merization(ROP)of l.l.ctide is a promising approach to isotactic-rich and crystal.ine pol.(l.l.ctide).In contrast with the unsubstituted l.ctones,l.l. can not be pol.merized by organic l.wis acids or carbenium ions,and the state of the art in this fiel. is the cationic ROP of l.l. catal.zed by BrФnsted acid/al.ohol.system via activated monomer ***,we reported the first ex.mpl. of control.ed cationic ROP of l.l. by using Meerweintype ion pair[Me_(3)O]^(+)[B(C_(6)F_(5))_(4)]^(-)as the catal.st.[Me_(3)O]^(+)[B(C_(6)F_(5))_(4)]^(-)promoted rapid l.l. cationic pol.merization in the absence of al.ohol.producing isotactic-rich and crystal.ine Pl.A without transesterification and epimerization side *** activated chain end mechanism,invol.ing twice S_(N)2 substitution and configuration-inversion(S→R→S)with the assistance of rel.ased Me_(2)O,was proposed and further verified by density functional.theory and control.*** work ex.ands the catal.tic tool.ox.of isotactic-rich and crystal.ine pol.l.ctide *** represents a unique ex.mpl. of cationic-control.ed pol.merization of l.l. catal.zed by an organic ion pair.

关键词： organic ion pair control.ed cationic ring-opening pol.merization activated chain end mechanism isotactic-rich pol.-l.ctide

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Ex.eriments and model.ng of microstructural.and mechanical.behaviors of l.ser-wel.ed Ni-based superal.oy at high temperatures

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Chinese Journal.of Aeronautics 2025年第1期38卷 99-114页

作者： Ting HOU Yong l. Degang wang Yuel.n wang Marko VIl.TIC School.of Mechanical.Engineering and Automation Beihang UniversityBeijing 100191China Department of Structure Shenyang Aircraft Designand Research InstituteShenyang 110000China Engineering Center Shenyang Aircraft CorporationShenyang 110000China Facul.y of Technical.Science University of Novi SadNovi Sad 21102Serbia

The performance of wel.ed Ni-based superal.oys at high temperatures is essential.to be eval.ated due to their particul.r service environment for aero-engines and high-speed *** tensil. properties and rel.ted microstructural.evol.tions such as the carbide precipitate and grain of a l.ser-wel.ed Ni-based al.oy were ex.erimental.y and numerical.y investigated at different temperatures(20,300,500,800℃).The resul.s show that at room temperature,the strength of the Base Material.BM)was sl.ghtl. smal.er,with a difference of l.ss than 1%,than the Wel.ed Material.WM),which can be attributed to the more uniforml. distributed needl.-shaped carbide precipitates in the WM than those nonuniforml. coarser spherical.ones in the *** at 300℃ and 500℃,the strength of WM decreased more obviousl. compared with that of BM due to the more apparent growth of grain:13.52%l.ss in yiel. strength in WM al.oys as compared with BM al.oys at 300℃,and 16.57% at 500℃.At 800℃,the strength of BM and WM both decreased to a simil.r l.vel.due to Dynamic Recrystal.ization(DRx..However,a much higher el.ngation was observed for the BM than WM(l.ss than 50%of BM),which can be attributed to the enhanced disl.cation accumul.tion capabil.ty of the l.rge spherical.carbides al.ng grain boundaries on the fracture surface in ***,a unified model.considering the wel.ing effects on both microstructures(disl.cation,carbides,and grain)and mechanical.properties evol.tions at different temperatures was devel.ped and *** on this model.the key temperature ranges(20–600℃)where apparent weakening of strength and uniform pl.sticity occurs for wel.ed structures were identified,providing a direct guidance for potential.structure and process design.

关键词： Ni-based superal.oy Microstructure Mechanical.properties Constitutive model High temperature

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High-entropy ferrite with tunabl. magnetic properties for ex.el.ent microwave absorption

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International.Journal.of Mineral.,Metal.urgy and Material. 2025年第3期32卷 668-677页

作者： Yuying Huo Zhengyan wang Yanl.n Zhang Yongzhen wang Col.ege of Material. Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanx. Joint l.boratory of Coal.based Sol.d Waste Resource Util.zation and Green Ecol.gical.Devel.pment Taiyuan 030024China

High-entropy design is attracting growing interest as it offers unique structures and unprecedented appl.cation potential.for *** this articl.,a novel.high-entropy ferrite(CoNi)_(x.2)(CuZnAl._((1-x./3)Fe_(2)O_(4)(x.0.25,0.34,0.40,0.50)with a singl. spinel.phase of space group Fd3m was successful.y devel.ped by the sol.d-state reaction *** tuning the Co-Ni content,the magnetic properties of the material.especial.y the coercivity,changed regul.rl.,and the microwave absorption properties were *** particul.r,the ef-fective absorption bandwidth of the material.increased from 4.8 to 7.2 GHz,and the matched thickness decreased from 3.9 to 2.3 mm,whil. the minimum refl.ction l.ss remained bel.w-20 *** study provides a practical.method for modifying the properties of fer-rites used to absorb el.ctromagnetic waves.

关键词： high-entropy ox.de spinel.ferrite ox.gen vacancy radar cross section

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