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75th World Foundry Congress, WFC 2024

作者： Qiu, Jin Li, Yuandong Liang, Xiaoyu Zhou, Hongwei Cao, Chi Bi, Guangli State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China Key Laboratory of Nonferrous Metal Alloys and Processing Ministry of Education Lanzhou University of Technology Lanzhou730050 China Wenzhou Pump and Valve Engineering Research Institute Lanzhou University of Technology Wenzhou325105 China

In this study, a new idea of prefabricated diffusion layer to improve the mechanical properties of composite plates is proposed. The results indicate that the metallurgical mechanical bonding formed by rheological cast-rolling + rolling can enhance the mechanical properties of the composite plate, and the shear strength and tensile strength under 50% reduction are as high as 105.0 MPa and 342.7 MPa, respectively. The mechanism analysis shows that cracks are formed in the diffusion layer along the normal direction during rolling, and the diffusion layer and the matrix always maintain good metallurgical bonding. The crack gaps of the diffusion layer are small when the reduction is 20%, and the soft matrix cannot enter the gaps to form secondary metallurgical bonding. The residual compressive stress is the main reason for the increase in shear strength. The aluminum matrix is recrystallized and refined when the reduction is 50%, the crack gaps of the diffusion layer increase, the fresh metal is squeezed into the gaps, the matrix re-forms metallurgical bonding. The broken intermetallic compounds and the matrix simultaneously form a mechanical lock and a metallurgical bonding, and the shear strength and tensile strength increase. The thickness of the diffusion layer increases, the unfilled crack gaps increase, the residual compressive stress of the matrix around the diffusion layer decreases, the shear strength decreases significantly, but the tensile property changes little. © 2024 75th World Foundry Congress, WFC 2024. All rights reserved.

关键词： Compressive stress

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Natural potential difference induced functional optimization mechanism for Zn-based multimetal bone implants

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Bioactive materials 2025年第2期44卷 572-588页

作者： Jing Xu Zhenbao Zhang Jianhui Wang Yuhan Qi Xiaohong Qi Yijie Liang Manxi Li Haixia Li Yantao Zhao Zhuangzhuang Liu Yanfeng Li Medical School of Chinese PLA Beijing100039China Department of Stomatology The Fourth Medical Centre of PLA General HospitalBeijing100048China Key Laboratory for Advanced Materials Processing Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing100083China Senior Department of Orthopedics The Fourth Medical Centre of PLA General HospitalBeijing100048China Beijing Engineering Research Center of Orthopedics Implants Beijing100048China Institute of Process Engineering Chinese Academy of SciencesBeijing100190China

Zn-based biodegradable metals(BMs)are regarded as revolutionary biomaterials for bone ***,their clinical application is limited by insufficient mechanical properties,delayed in vivo degradation,and overdose-induced Zn^(2+)***,innovative multi-material additive manufacturing(MMAM)is deployed to construct a Zn/titanium(Ti)hetero-structured *** biodegradation and biofunction of Zn exhibited intriguing characteristics in composites.A potential difference of about 300 mV naturally existed between Zn and *** natural potential difference triggered galvanic coupling corrosion,resulting in 2.7 times accelerated degradation of *** excess release of Zn^(2+)induced by accelerated degradation enhanced the antibacterial function.A voltage signal generated by the natural potential difference also promoted in vitro osteogenic differentiation through activating the PI3K-Akt signaling pathway,and inhibited the toxicity of overdose Zn^(2+)in vivo,significantly improving bone ***,MMAM technology allows for the specific region deployment of *** the future,Ti and Zn could be respectively deployed in the primary and non-loadbearing regions of bone implants by structural designs,thereby achieving a functionally graded application to overcome the insufficient mechanical properties of Zn-based *** work clarifies the functional optimization mechanism for multimetal bone implants,which possibly breaks the application dilemma of Zn-based BMs.

关键词： Multi-material additive manufacturing Biodegradable metal Zn/Ti Potential difference Bone repair

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Synthesis,formation mechanism,and intrinsic physical properties of several As/P-containing MAX phases

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Journal of materials Science & technology 2023年第2期133卷 23-31页

作者： Hongxiang Chen Sheng Li Jun Deng Zhilong Zhang Jianeng Huang Fa Chang Li Huang Shixuan Du Pinqiang Dai School of Materials Science and Engineering Fujian University of TechnologyFuzhou 350118China Institute of Physics&University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100190China Fujian Provincial Key Laboratory of Advanced Materials Processing and Application Fuzhou 350118China Center for Advanced Energy and Functional Materials Fujian University of TechnologyFuzhou 350118China Songshan Lake Materials Laboratory Dongguan 523808China CAS Key Laboratory of Vacuum Physics Beijing 100049China

321 phases are an atypical series of MAX phases,in which A=As/P,with superior elastic properties,fea-turing in the MA-triangular-prism bilayers in the crystal *** now,besides Nb 3 As 2 C,the pure phases of the other 321 compounds have not been realized,hampering the study of their intrinsic ***,molten-salt sintering(MSS)and solid-state synthesis(SSS)were applied to synthesize As/P-containing 321 phases and 211 *** the phase composition of the end-product via multiple-phase Rietveld refinement,we found that MSS can effectively improve the purity of P-containing MAX phases,with the phase content up to 99%in Nb_(3)P_(2)C and 75.4(5)%in Nb 2 *** contrast,MSS performed poorly on As-containing MAX phases,only 8.9(4)%for Nb 3 As 2 C and 64(2)%for Nb 2 AsC,as opposed to the pure phases obtained by *** experimental analyses combined with first-principles calculations reveal that the dominant formation route of Nb_(3)P_(2)C is through NbP+Nb+C→Nb_(3)P_(2)***,we found that the benefits of MSS on P-containing MAX phases are on the facilitation of three consid-ered chemical reaction routes,especially on Nb 2 PC+NbP→Nb_(3)P_(2)***,the intrinsic physical properties and Fermi surface topology of two 321 phases consisting of electron,hole,and open orbits are revealed theoretically and experimentally,in which the electron carriers are dominant in electrical *** feasible synthesis methods and the formation mechanism are instructive to obtain high-purity As/P-containing MAX phases and explore new MAX ***,the intrinsic physical properties will give great support for future applications on 321 phases.

关键词： MAX phase Molten-salt synthesis Chemical reaction route Metallic ceramics Formation mechanism Quasi-harmonic approximation

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Directly Unveiling the Photothermal Corrosion of BiVO4 via In-situ Transmission Electron Microscopy

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Chemical Research in Chinese Universities 2025年第2期41卷 351-357页

作者： WANG Lindong SUN Jingyi WANG Lang LI Yu HU Zhiyi SU Baolian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and Engineering(ISME)Wuhan University of TechnologyWuhan 430070P.R.China Nanostructure Research Centre(NRC) Wuhan University of TechnologyWuhan 430070P.R.China CMI(Laboratory of Inorganic Materials Chemistry) University of Namurrue deBruxelles 61B-5000NamurBelgium

BiVO4(BVO)is widely utilized in photothermal catalysis because of its favorable bandgap structure(2.4 eV),excellent photo response capabilities and high thermal ***,the mechanism of BVO photothermal corrosion still remains unclear due to the lack of visualized characterization on the degradation process in real ***,we directly unveil the photothermal-induced microstructural evolution of BVO through in-situ heating(scanning)transmission electron microscopy[(S)TEM].The results indicate that the electrons are the initiating condition(“switch”)for the photothermal corrosion of BVO,resulting in the precipitation of Bi and reduction of V5+to V3+in the substrate,while the thermal field facilitates the evaporation of Bi and the recrystallization of *** work sheds light on the mechanism of BVO photothermal corrosion in dynamics and provides significant insights into the photothermal synergistic effects.

关键词： BiVO4 Photothermal corrosion In-situ transmission electron microscopy(TEM) Photothermal catalysis Structural evolution

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Resolving the sintering conundrum of high-rhenium tungsten alloys

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Journal of materials Science & technology 2023年第35期166卷 78-85页

作者： Zhongyou Que Xingyu Li Lin Zhang Xuanhui Qu Zichen Wei Chenguang Guo Haishen Sun Mingli Qin Gang Chen Peinan Du Yanhao Dong Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of ChinaChengdu 610213China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Tungsten-rhenium(W-Re)alloys with high-Re contents are the preferred refractory metal materials in many applications because of the improved ductility and processability over pure W and low-Re tung-sten ***,the sintering concurrently becomes increasingly more difficult with increasing Re *** we proposed that the sintering conundrum is caused by the lowered crystal symmetry and the wider dihedral angle distribution when body-center-cubic(BCC)W is alloyed with more hexagonal-close-packed(HCP)Re,which results in inefficient pore removal in the final stage *** showed that the conundrum can be resolved by pressureless two-step sintering(TSS)which suppresses acceler-ating final-stage grain growth,and our proposal is supported by the data of the critical densityρc that is required to start the second step for successful TSS at different W-Re *** ultrafine-grained W-Re alloys with∼300 nm average grain size and up to 25 wt%Re were successfully *** work demonstrates the unique opportunities offered by two-step sintering to advance the scientific understanding and technological practices in powder metallurgy and related fields.

关键词： W-Re alloys Two-step sintering Grain growth Ultrafine-grained materials

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Effect of Si content of Hot-Dip Plating on the Interface Structure and Properties of Solid-Liquid Cast and Rolled 6061/Q345 Composite Plate 75

Effect of Si content of Hot-Dip Plating on the Interface Str...

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75th World Foundry Congress, WFC 2024

作者： Zhang, Xuyuan Li, Yuandong Ju, Tao Liu, Guangyu Zhou, Hongwei Wang, Sheng Cao, Chi Bi, Guangli State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals Lanzhou University of Technology Lanzhou730050 China Key Laboratory of Non-Ferrous Metal Alloys and Processing Ministry of Education Lanzhou University of Technology Lanzhou730050 China Wenzhou Pump and Valve Engineering Research Institute Lanzhou University of Technology Wenzhou325105 China

Employing hot-dip coating with Al-XSi alloys, combined with phase diagram analysis and first-principles calculations, the influence of Si elements on the interfacial microstructure, phase composition, and mechanical properties in the cast-rolled 6061/Q345 composite sheets was investigated. Results demonstrated that the addition of Si in the hot-dip coating led to the formation of novel ternary phases, Al-Fe-Si, namely Al3FeSi2, Al9Fe2Si2, and Al0.5Fe3Si0.5, at the aluminum-steel interface, which reduced the brittle phases Al5Fe2 and Al3Fe, thereby enhancing the deformation resistance and toughness of the composite. Compared to the composite sheet with pure Al coating (yielding a tensile strength of 402.4 MPa and shear strength of 51.3 MPa), the maximum values of 438.5 MPa and 120.8 MPa for tensile and shear strengths were achieved with an Al-1%Si (mass fraction) coating, representing increases of 8.9% and 135.4%, respectively. Further increments in the Si content in the hot-dip bath to 7.5% resulted in a decline in both the tensile strength (395.7 MPa) and shear strength (78.6 MPa) of the composite sheet. The tensile and shear strengths exhibited a trend of initially increasing and then decreasing with the rising Si content in the hot-dip coating. © 2024 75th World Foundry Congress, WFC 2024. All rights reserved.

关键词： Tensile strength

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Polysaccharide-rich extract of Potentilla anserina ameliorates nonalcoholic fatty liver disease in free fatty acid-induced HepG2 cells and high-fat/sugar diet-fed mice

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Food Science and Human Wellness 2024年第6期13卷 3351-3360页

作者： Xiujun Lin Yimei Zheng Yingying Yan Hongting Deng Shunxin Wang Yuanju He Yuting Tian Wenhui Zhang Hui Teng Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety Guangdong Province Engineering Laboratory for Marine Biological ProductsGuangdong Provincial Engineering Technology Research Center of SeafoodKey Laboratory of Advanced Processing of Aquatic Product of Guangdong Higher Education InstitutionCollege of Food Science and TechnologyGuangdong Ocean UniversityZhanjiang 524088China College of Food Science Fujian Agriculture and Forestry UniversityFuzhou 350002China Institute of Agricultural Products Processing&Food Science Tibet Academy of Agricultural and Animal Husbandry SciencesLhasa 850002China

Potentilla anserina L.(PA)belongs to the Rosaceae family,is a common edible plant in the Qinghai-Tibet Plateau areas of *** study elucidates the mechanism upon which crude polysaccharide of PA(PAP)on fat accumulation in HepG2 cells stimulated by oleic acid(OA)and high fat high sugar induced *** result revealed that PAP inhibited lipid accumulation in obese mice and ameliorated the degree of damage in OA-induced HepG2 ***,compared to the control group,the TG and TC levels were decreased in cells and mice serum,the aspartate transaminase and alamine aminotransferase contents were declined in liver of obese mice by PAP *** expressions of adipogenic genes of SREBP-1c,C/EBPα,PPARγ,and FAS were inhibited after PAP ***,PAP increased the mRNA levels of CPT-1 and PPARα,which were involved in fatty acid *** present results indicated the PAP could alleviate the damage of liver associated with obesity and PAP treatment might provide a dietary therapeutic option for the treatment of hyperlipidemia.

关键词： Potentilla anserina L. Non-alcoholic fatty liver disease Lipid accumulation HepG2 cells High fat diet

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Building a Highly Stable Ultrathin Nanoporous Layer Assisted by Glucose for Desalination

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Engineering 2022年第9期16卷 247-255页

作者： Yanqiu Zhang Fan Yang Hongguang Sun Yongping Bai Songwei Li Lu Shao MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage&State Key Laboratory of Urban Water Resource and Environment School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China MOE Key Laboratory of Materials Processing and Molding&National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhou 450002China

Although nanoporous membranes are of great interest in desalination,it is still challenging to construct highly permeable nanoporous membranes with excellent rejections for an efficient desalination *** this work,highly permeable nanoporous membranes were built from renewable resources,assisted by the versatile functions of glucose and dopamine,with coupling reactive groups via interfacial reaction with 1,3,5-benzenetricarbonyl trichloride(TMC).The small molecules(0.66 nm)of glucose,which have high hydrophilicity,can diffuse into the membrane for an effective reaction to ensure structural *** novel ultrathin(~44 nm)nanofiltration(NF)membrane exhibits ultra-high Na_(2)SO_(4)flux and excellent rejection of Na_(2)SO_(4)(66.5 L·m^(-2)·h^(-1),97.3%)and MgSO4(63.0 L·m^(-2)·h^(-1),92.1%)under a pressure of 5 bar(1 bar=10^(5)Pa)which is much superior to the performance of natural-product NF *** membrane demonstrates excellent long-term stability,as well as tremendous acid-base and alkali-base stability and high anti-pollution *** designed membrane materials and architecture open a new door to biopolymer-based separation membranes beyond existing membrane materials.

关键词： Nanoporous membrane Renewable resources Nanofiltration Desalination Glucose

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Electronegativity-Induced Single-Ion Conducting Polymer Electrolyte for Solid-State Lithium Batteries

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Energy & Environmental materials 2023年第4期6卷 40-48页

作者： Tianyi Hou Yumin Qian Dinggen Li Bo Xu Zhenyu Huang Xueting Liu Haonan Wang Bowen Jiang Henghui Xu Yunhui Huang State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement Ministry of EducationSchool of PhysicsBeijing Institute of TechnologyBeijing 100081China School of Energy and Power Engineering Huazhong University of Science and TechnologyWuhan 430074China Jiangsu Jitri-Hust Intelligent Equipment Technology Nanjing 210000China

The application of solid polymer electrolytes(SPEs)is severely impeded by the insufficient ionic conductivity and low Li^(+)transference numbers(t_(Li)^(+)).Here,we report an iodine-driven strategy to address both the two longstanding issues of SPEs *** lodine-containing groups introduced on polymer chains effectively attract Li^(+)ions,facilitate Li^(+)transport,and promote the dissociation of Li ***,iodine is also favorable to alleviate the strong O-Li^(+)coordination through a Lewis acidbase interaction,further improving the ionic conductivity and t_(Li)^(+).As a proof of concept,an iodinated single-ion conducting polymer electrolyte(IPE)demonstrates a high ionic conductivity of 0.93 mS cm^(-1)and a high t_(Li)^(+)of 0.86 at 25℃,which is among the best results ever reported for ***,symmetric Li/Li cells with IPE achieve a long-term stability over 2600 h through the in-situ formed LiF-rich *** a result,Li-S battery with IPE maintains a high capacity of 623.7 mAh g^(-1)over 300 cycles with an average Coulombic efficiency of 99%.When matched with intercalation cathode chemistries,Li/IPE/LiFePO_(4)and Li/IPE/LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)solid-state batteries also deliver high-capacity retentions of 95%and 97%at 0.2 C after 120 cycles,respectively.

关键词： iodine lithium polymer electrolytes single-ion conducting solid-state batteries

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Multifactor roadmap for designing low-power-consumed micro thermoelectric thermostats in a closed-loop integrated 5G optical module

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Interdisciplinary materials 2024年第2期3卷 326-337页

作者： Dongwang Yang Yubing Xing Jiang Wang Kai Hu Yani Xiao Kechen Tang Jianan Lyu Junhao Li Yutian Liu Peng Zhou Yuan Yu Yonggao Yan Xinfeng Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhanChina Nanostructure Research Center Wuhan University of TechnologyWuhanChina Research Center for Materials Genome Engineering Wuhan University of TechnologyWuhanChina Institute of Physics(IA) RWTH Aachen UniversityAachenGermany

As the core components of fifth-generation(5G)communication technology,optical modules should be consistently miniaturized in size while improving their level of *** inevitably leads to a dramatic spike in power consumption and a consequent increase in heat flow density when operating in a confined *** ensure a successful start-up and operation of 5G optical modules,active cooling and precise temperature control via the Peltier effect in confined space is essential yet *** this work,p-type Bi_(0.5)Sb_(1.5)Te_(3)and n-type Bi_(2)Te_(2.7)Se_(0.3)bulk thermoelectric(TE)materials are used,and a micro thermoelectric thermostat(micro-TET)(device size,2×9.3×1.1mm^(3);leg size,0.4×0.4×0.5mm^(3);number of legs,44)is successfully integrated into a 5G optical module with Quad Small Form Pluggable 28 *** a result,the internal temperature of this kind of optical module is always maintained at 45.7℃ and the optical power is up to 7.4 ***,a multifactor design roadmap is created based on a 3D numerical model using the ANSYS finite element method,taking into account the number of legs(N),leg width(W),leg length(L),filling atmosphere,electric contact resistance(Rec),thermal contact resistance(Rtc),ambient temperature(Ta),and the heat generated by the laser source(QL).It facilitates the integrated fabrication of micro-TET,and shows the way to enhance packaging and performance under different operating *** to the roadmap,the micro-TET(2×9.3×1mm^(3),W=0.3 mm,L=0.4 mm,N=68 legs)is fabricated and consumes only 0.89W in cooling mode(Q_(L)=0.7W,T_(a)=80℃)and 0.36Win heating mode(T_(a)=0℃)to maintain the laser temperature of 50℃.This research will hopefully be applied to other microprocessors for precise temperature control and integrated manufacturing.

关键词： 5G optical module finite element simulation micro thermoelectric thermostat Peltier effect

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