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Acta Metallurgica Sinica(English Letters) 2024年第6期37卷 1007-1018页

作者： Huanzhi Zhang Tianxin Li Qianqian Wang Zhenbo Zhu Hefei Huang Yiping lu Engineering Research Center of High Entropy Alloy Materials(Liaoning Province) School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Shanghai Institute of Applied Physics Chinese Academy of Sciences(CAS)Shanghai201800China

Interstitial strengthening with nitrogen(N)is one of the effective ways to improve the mechanical properties of HEAs,but the effects of N on the microstructures and mechanical properties of the irradiated HEAs have not been studied ***,the microstructures and mechanical properties of N-free and N-doped Ti_(2)zrNbV_(0.5)Mo_(0.2)HEAs before and after He irradiation were *** results showed that the solid solution strengthening caused by interstitial N improved the yield strength at room temperature and 1023 K without significantly reducing plasticity.N doping significantly promoted the growth,aggregation and wider spatial distribution of He bubbles by enhancing the mobility of He atoms/He-vacancy complexes,with the average size of He bubbles increasing from 10.4 nm in N-free HEA to 31.0 nm in N-doped *** addition,N-doped HEA showed a much higher irradiation hardness increment and hardening fraction than N-free *** to conventional materials doped with N,the introduction of N into Ti_(2)zrNbV_(0.5)Mo_(0.2)HEA had adverse effects on its resistance to He bubble growth and irradiation *** results of this study indicated that N doping may not improve the irradiation resistance of HEAs.

关键词： High-entropy alloys Nitrogen doping Mechanical properties Helium bubbles Irradiation resistance

Mechanobiologically optimized Ti-35Nb-2Ta-3zr improves load transduction and enhances bone remodeling in tilted dental implant therapy

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Bioactive Materials 2022年第10期7卷 15-26页

作者： Chuanyuan Mao Weijun Yu Min Jin Yingchen Wang Xiaoqing Shang lu Lin Xiaoqin Zeng Liqiang Wang Eryi lu Department of Stomatology Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai200127China State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringMaterials Genome Initiative CentreShanghai Jiao Tong UniversityShanghai200240China National Engineering Research Center of Light Alloy Net Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China

The tilted implant with immediate function is increasingly used in clinical dental therapy for edentulous and partially edentulous patients with excessive bone resorption and the anatomic limitations in the alveolar ***,peri-implant cervical bone loss can be caused by the stress shielding ***,inspired by the concept of“materiobiology”,the mechanical characteristics of materials were considered along with bone biology for tilted implant *** this study,a novel Ti-35Nb-2Ta-3zr alloy(TNTZ)implant with low elastic modulus,high strength and favorable biocompatibility was *** the human alveolar bone environment was mimicked in goat and finite element(FE)models to investigate the mechanical property and the related peri-implant bone remodeling of TNTZ compared to commonly used Ti-6Al-4V(TC4)in tilted implantation under loading ***,a layer-by-layer quantitative correlation of the FE and X-ray Microscopy(XRM)analysis suggested that the TNTZ implant present better mechanobiological characteristics including improved load transduction and increased bone area in the tilted implantation model compared to TC4 implant,especially in the upper 1/3 region of peri-implant bone that is“lower stress”.Finally,combining the static and dynamic parameters of bone,it was further verified that TNTZ enhanced bone remodeling in“lower stress”upper 1/3 *** study demonstrates that TNTZ is a mechanobiological optimized tilted implant material that enhances load transduction and bone remodeling.

关键词： Ti-35Nb–2Ta–3zr Tilted implant Low elastic modulus Bone remodeling Mechanobiologically optimization

Oxidation-extraction desulfurization of model oil over zr-ZSM-5/SBA-15 and kinetic study

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Frontiers of Chemical Science and Engineering 2014年第2期8卷 203-211页

作者： Chuanzhu lu Hui FU Huipeng LI Hua ZHAO Tianfeng CAI School of Petrochemical Engineering Liaoning Shihua University Fushun 113001 China

ZSM-5/SBA-15 composite molecular sieves were synthesized using post-synthesis method and characterized by X-ray diffraction and N2 adsorption-desorption. The oxidative-extration desulfurization of model oil was investigated by using hydrogen peroxide as the oxidant, tetrabutyl ammonium bromide as phase transfer catalyst, dimethyl sulfoxide as extractant, and zr-ZSM-5/ SBA-15, Ag-ZSM-5/SBA-15, Ce-ZSM-5/SBA-15 as catalyst. Under the optimal conditions, the desulfurization rate decreases in the order： zr-ZSM-5/SBA-15 〉 Ce-ZSM- 5/SBA-15 〉 Ag-ZSM-5/SBA-15. The highest desulfuriza- tion rate is 84.53% under the catalysis of zr-ZSM-5/SBA- 15. Kinetics analysis shows that the reaction is pseudofirst-order with the activation energy of 44.23 kJ/mol.

关键词： composite molecular sieve oxidation desul-furation extraction kinetic

Effects of Deformation Modes on Texture Evolution during Hot Working of Al-Zn-Mg-Cu-zr Alloy

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Journal of Wuhan University of Technology(Materials Science) 2016年第3期31卷 616-623页

作者：赵晓东 lu Ruilong LIN Jinbao 陈慧琴 School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Applied Science Taiyuan University of Science and TechnologyTaiyuan 030024China

Deformation modes have strong effects on deformation textures and subsequent annealing textures during hot working of metals. Micro-textures and macro-textures during hot axisymmetric and planar compressive deformation and subsequent annealing processes of Al-Zn-Mg-Cu-zr alloy were investigated by EBSD and XRD respectively. The EBSD testing indicated that for the axisymmetric compressive deformation, Brass along the a-fiber and Goss present in the sample deformed at 350 ~C, Rotated-Cube was present and Brass transformed to Goss along a-fiber after annealing; Rotated-Cube appeared only in the deformation at 420 ~C, which decreased and Brass appeared after annealing. For the planar compressive deformation, Rotated-Cube and Brass aligned to a and fl fibers present in the deformation at 350 ~C, Rotated-Cube texture transformed to Brass along the ct-fiber after annealing; Rotated-Cube and Brass were present in the deformation at 420 ~C, and the Rotated-Cube was enhanced and Brass transformed to Goss after annealing. Shearing textures dominated on the surface of the specimen. XRD testing showed that Rotated-Cube and a few Goss dominated in the thickplates formed by upsetting and drawing, which transformed to Cube after annealing; However, Brass and Cube textures present in the thick-plates formed by rolling besides Rotated-Cube and Goss textures, which remained in the plates after annealing.

关键词： Al-Zn-Mg-Cu-zr alloy deformation annealing textures

Dynamic Tensile Property of zr-based Metallic Glass/Porous W Phase Composite

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Journal of Materials Science & Technology 2010年第10期26卷 908-913页

作者： Yunfei Xue lu Wang Huanwu Cheng Fuchi Wang Haifeng Zhang Aiming Wang School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The dynamic tensile deformation and fracture behavior of the zr-based metallic glass/porous W phase composite were investigated at room temperature by means of the Split Hopkinson Tension Bar （SHTB）.It was found that the composite exhibited no appreciable macroscopic plastic deformation prior to catastrophic fracture and the fracture surface was perpendicular to the axial *** micro cracks were observed along the interface between W grains or the interface between the metallic glass phase and the W *** electron microscopy （SEM） observations revealed that vein-like patterns,dimple-like patterns and substantive ridge-like structures were the typical fracture morphologies on the fracture surface for the metallic glass phase and the morphology of the W phase is a mixture of intergranular and transgranular *** on those results referred above,the dynamic tensile deformation and fracture mechanism of the zr-based metallic glass/porous W phase composite were discussed in detail.

关键词： Metallic glasses Porous W Composite Dynamic tension Fracture behavior

Simultaneous improving luminescence intensity and stability of CsPbBr_(3):SCN−@Eu/zr-Uio-66-NH_(2) with tunable emissions from blue to green and applications in indoor photovoltaics

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Nano Research 2024年第8期17卷 6879-6887页

作者： Minze Li Yao Sun Honglai lu Peifen Zhu Ruihong Wang Guofeng Wang Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China Department of Electrical Engineering and Computer Science University of MissouriColumbiaMO 65211USA

The construction of stable and efficient materials that emit blue and green light remains a *** the blue light materials reported,metal-organic framework(MOF)materials are rarely reported as blue phosphors due to their weak luminescence *** on the construction of CsPbBr_(3)@MOF(CPB@MOF),an innovative idea was proposed to simultaneously enhance the green luminescence of CPB and the blue luminescence of MOF through the interaction between CPB and MOF for the first *** expected,the blue luminescence from CPB:7%SCN−@0.5%MOF:Eu as well as the green luminescence from 5%CPB:7%SCN−@MOF:Eu was sufficient to construct high-performance light-emitting diode(LED)devices and further excite solar cells to generate stable photoelectric *** white LED(WLED)device with excellent color quality(color rendering index(CRI)=96.2)and correlated color temperature(CCT=9688 K)can be constructed by using the obtained blue-emitting CPB:7%SCN-@0.5%MOF:Eu,green-emitting 5%CPB:7%SCN−@MOF:Eu,and red-emitting PPB:30%Mn^(2+).The density functional theory(DFT)theoretical calculation results indicate that the p orbital of Pb plays the major role in the conduction band,and the p orbital of Br plays the major role in the valance band of CPB and CPB:SCN−.While the p orbital of O plays the major role in both the conduction band and valance band of *** heat capacity of CPB and CPB:SCN−separately reaches the Dulong–Petit limit at 200 and 400 K,indicating that the thermal stability of CsPbBr_(3)increases after SCN−doping.

关键词： CsPbBr_(3):SCN−@Uio-66-NH_(2) composites luminescence stability white light-emitting diodes(WLEDs) indoor photovoltaics density functional theory(DFT)calculation

A comprehensive analysis on microstructure evolution of Mg-5.65Zn-0.66zr alloy during hot deformation

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Journal of Magnesium and Alloys 2021年第2期9卷 520-531页

作者： Qian Cheng Liang Chen Jianwei Tang Guoqun Zhao lu Sun Cunsheng Zhang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) Shandong UniversityJinanShandong 250061PR China

The microstructure evolution of Mg-5.65 Zn-0.66 zr(wt.%)alloy was studied based on the hot compression *** results indicated that the flow stress increased rapidly to a peak point at the initial stage,and then it gradually ***,high temperature and low strain rate resulted in the decreasing of flow *** samples exhibited a necklace grain structure because of the occurrence of partial dynamic recrystallization(DRX).High temperature increased both the size and fraction of DRXed grains,while high strain rate showed an opposite *** the conditions of 350°C/0.001 s^(-1)and 350°C/0.1 s^(-1),the twins were not exhibited and DRX played a dominant ***,the obvious split of basal texture was *** pyramidalslip with high value of Schmid factor was active in large deformed grains,which corresponded to the peak split point in(0001)pole figure.A mechanism about the grain rotation was proposed to explain the relationship between the pyramidal slip and the split of basal ***,it was found that large number of{10–12}extension twins were formed during the initial stage at condition of 300°C/1 s^(-1),and the number of twins decreased with the increase of *** twins greatly contributed to the fast formation of basal texture and grain ***,the non-basal slips were active in twining region,which could facilitate the nucleation of DRX.

关键词： Hot compression Microstructure Recrystallization Texture Twinning

Dynamic lithium-compensation mechanism for densification of garnet-type Li_(7)La_(3)zr_(2)O_(12)electrolyte by Li_(2)O atmosphere buffer pair

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Nano Research 2024年第7期17卷 6184-6191页

作者： Chujun Zheng Ya Chen Haoxin Dong Yan lu Jun Jin Zhaoyin Wen CAS Key Laboratory of Materials for Energy Conversion Shanghai Institute of CeramicsChinese Academy of ScienceShanghai 200050China State Key Lab High Performance Ceram and Superfine Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Solid-state lithium metal batteries are one of the most promising options for next-generation batteries pursuing high-energy density and ***,the inevitable volatilization of lithium compounds during sintering leads to low relative density and low ionic conductivity of solid-state ***,the dynamic lithium-compensation mechanism is proposed to facilitate the densification of Ta-substituted garnet-type electrolyte(Li_(6.5)La_(3)zr_(1.5)Ta_(0.5)O_(12)(LLZT))through the reversible manipulating of Li_(2)O ***_(2)zrO_(3)is used as mother powder additive,which reacts with Li_(2)O in sintering atmosphere and forms Li_(6)zr_(2)O_(7).Li_(2)zrO_(3)/Li_(6)zr_(2)O_(7)buffer pair manipulates the sintering Li_(2)O atmosphere,which is vital for LLZT,within the Li_(2)O partial pressure range corresponding to Li_(2)zrO_(3)and Li_(6)zr_(2)O_(7).Furthermore,the reversibility mechanism of buffer pair for Li_(2)O absorption and release is *** obtained LLZT exhibits a relative density of over 96%and an ionic conductivity exceeding 7×10^(−4)S·cm^(−1)with no abnormal grain *** symmetric cell demonstrates an excellent lithium dendrite suppressing ability(stable cycling at a current density of 0.3 mA·cm^(−2)for over 1000 h).Such dynamic lithium-compensation strategy has been successfully applied in atmosphere manipulation of LLZT sintering process,which reduces the dependence of LLZT on the Li_(2)O atmosphere,making it conducive to large-scale preparation of electrolyte ceramics.

关键词： solid-state batteries garnet-type electrolyte high-density electrolyte dynamic lithium-compensation buffer pair

Laser additive manufacturing of laminated bulk metallic glass composite with desired strength-ductility combination

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Journal of Materials Science & Technology 2023年第16期147卷 68-76页

作者： Xiangcheng Cui Weihua Hu Xing lu Yunzhuo lu School of Materials Science and Engineering Dalian Jiaotong UniversityDalian 116028China

Introducing ductile crystalline dendrites into a glassy matrix to produce bulk metallic glass composites(BMGCs)is an effective way to improve the poor ductility of bulk metallic glasses(BMGs).However,the presence of soft crystalline phases tends to decrease the strength and causes the strength-ductility ***,relying on the flexible laser additive manufacturing(LAM)technique that allows the composition tailoring of each layer,we successfully fabricate a lamellated zr-based BMGC constructed by the alternating superimposition of soft and hard *** lamellated BMGC shows an exceptional combination of yield strength(∼1.2 GPa)and ductility(∼5%).Such enhanced strength-ductility synergy is attributed to the asynchronous deformation at two scales,i.e.,inter-laminar and intra-laminar,and the unique dual-scale Ta particles that uniformly distribute on the amorphous *** lamellated structure design motif,enabled by the flexible LAM technology,provides a new window for the development of high-performance *** is also applicable to the synergistic enhancement of strength and plasticity of other brittle metallic materials.

关键词： Bulk metallic glass composite Additive manufacturing Mechanical property Lamellated Strength-ductility synergy

Effects of casting current on structure and properties of a nanostructured zr-Cu-Fe-Al bulk metallic glass

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Journal of Iron and Steel Research International 2018年第6期25卷 630-636页

作者： Si-nan Liu Wei-xia Dong Chen-yu lu Zhu-wei lu Jia-cheng Ge Chen-chen Yuan Bao-an Sun Tao Feng Xun-li Wang Si Lan Herbert Gleiter Institute of Nanoscience School of MaterialsScience and Engineering Nanjing University of Science andTechnology Nanjing 210094 Jiangsu China Department of Physics City University of Hong KongHong Kong China School of Materials Science and Engineering SoutheastUniversity Nanjing 211189 Jiangsu China

The effects of casting currents on the thermophysical behaviors, atomic and nanoscale structure, and mechanical properties of two zr-based-bulk metallic glasses, i.e., zr59Cu33A18 and zr59（Cuo.55Feo.45）33A18, were studied by using differential scanning calorimetry, wide-angle X-ray diffraction, and small-angle X-ray scattering, as well as compression tests. The casting currents can be tuned to change the casting initiative temperature. Results revealed that there is no anomalous structural change for the zr59Cu33A18 molten liquid before crystallization during cooling with different casting currents. In contrast, liquid-state phase separation was suggested to occur in the zr59（Cuo.55Feo.45）33A18 molten liquid prepared using lower casting current before crystallization during cooling. The position shift of the first sharp diffraction peak for the diffraction pattern of zr59（Cuo.55Feo.45）33A18 shows that the density of the molten liquid may decrease upon cooling at different casting currents. The small-angle X-ray scattering results indicate that the heterogeneity of the zr59（Cuo.55- ***）33A18 metallic glasses increases with decreasing the casting temperature. As a result, the metallic glasses with a liquid-state phase separation possess better mechanical properties, including higher-yielding stress and more significant compressive ductility. The increase in degree of heterogeneity formed by nanoscale liquid-state phase separation and their interactions with the shear bands for the zr-Cu-Fe-Al bulk metallic glasses were suggested to be responsible for the enhanced mechanical properties.

关键词： Bulk metallic glass Liquid-state phase separation Wide-angle X-ray diffraction Small-angle X-rayscattering Structure heterogeneity