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ChONdROCyTE APOPTOSIS IN ARTICULAR CARTILAGE WIThKAShIN-BECK dISEASE

Journal of Pharmaceutical Analysis 2005年第1期17卷 80-85页

作者： wang S. Guo x. zuo h. x. P. Ping z. zhang y. zhang z. Qeng d. Key Laboratory of Environment and Genes Related to diseases (x.'an Jiaotong University) Ministry of Education Xi'an 710061 China department of Imaging Center Second Hospital of Xi'an Jiaotong University Xi'an 710004 China

Objective: To investigate the apoptosis of articular chondrocyte and the ex.ression of Bcl-2, Bax. Fas and iNos in articular cartilage with Kashin-Beck disease (KBd) in order to understand the pathogenesis of chondronecrosis in KBd. Methods: The collected samples of human articular cartilage were divided into two groups: control group (15 samples from 15 cases), KBd group (15 samples from 15 cases). KBd patients were diagnosed by "Pathological Criteria to diagnose KBd in China". Chondrocyte apoptosis was detected by TUNEL staining, and the Bcl-2, Bax. Fas and iNos positive articular chondrocytes were stained by the B-SA of immunohistochemistry. Articular cartilage was classified three zones and the positive rate were counted by light microscope for cytoplasimic staining by polyclonal antibodies of Bcl-2, Bax. Fas and iNos and apoptotic chondrocytes by TUNEL. Results: 1 The percentage of positive apoptotic chondrocytes stained by TUNEL in the middle zone of articular cartilage from the KBd-children group(33.60±2.71%) was higher than that of the control (1.33±0.41% r=11.59, g=28, Phe percentage of chondrocytes staining for Bcl-2, Bax. Fas and iNos among the upper and the middle zone in KBd group were significantly higher than that of the control (t=11.75-18.65, g=14, Phe remarkable difference in the ex.ression of Bcl-2, Bax. Fas and iNos among the upper, the middle and the deep zones was also seen in KBd articular cartilage (F=73.49-114.42, g=42, Pd staining for Bcl-2, Bax. Fas and iNos in KBd children was prominent in the upper zone (41.93±12.26%, 45.60±15.78%, 53.60±16.49%, 45.47±14.02%) and the middle zone(14.93±3.50%, 13.87±4.32%, 23.27±4.83%, 21.67±6.82%) of articular cartilage, respectively. Conclusion: The chondrocyte apoptosis and the present of Bcl-2, Bax. Fas and iNos positive chondrocytes in articular cartilage of children with KBd were significantly higher than that of the control.

关键词： Apoptosis Bax bcl-2 Fas iNos Kashin-Beck disease

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Microstructure and mechanical properties of double-side friction stir welded 6082Al ultra-thick plates

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Journal of Materials Science & Technology 2020年第6期41卷 105-116页

作者： C.yang J.F.zhang G.N.Ma L.h.Wu x.M.zhang G.z.h. P.x.e d.R.Ni B.L.x.ao K.S.wang z.y.Ma 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 ChinaShenyang 110016China CRRC Changchun Railway Vehicles Co. Ltd.Changchun 130062China School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an 710055China

In the present work,80 mm thick 6082Al alloy plates were successfully double-side welded by friction stir welding(FSW).The relationship between the microstructures and mechanical properties was built for the double-side FSW butt joint with more attention paid to the local characteristic *** was shown that a phenomenon of microstructural inhomogeneity ex.sted in the nugget zone(Nz)through the thickness *** grain size presented an obvious gradient distribution from the top to the bottom for each single-pass weld,and the microhardness values decreased from both surfaces to the middle of the *** lowest hardness zone(Lhz)ex.ibited a"hyperbolical"-shaped distribution ex.ending to the middle of the *** tensile properties were obtained in the three sliced specimens of the FSW joint,and the joint coefficient reached about 70%which achieved the same level as the conventional FSW Al alloy *** element modeling proved that the"hyperbolical"-shaped heat affected zone(hAz)was beneficial to resisting the strain concentration in the middle layer specimen which helped to increase the tensile *** on the analysis of the hardness contour map,tensile property and microstructural evolution of the joints,an Isothermal Softening Layer(ISL)model was proposed and established,which may have a helpful guidance for the optimization on the FSW of ultra-thick Al alloy plates.

关键词： Ultra-thick aluminum alloy plates double-side friction stir welding Finite element model Microstructural inhomogeneity Mechanical properties

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Enhanced localiz.d.and uniform corrosion resistances of bulk nanocrystalline 304 stainless steel in high-concentration hydrochloric acid solutions at room temperature

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Journal of Materials Science & Technology 2018年第12期34卷 2498-2506页

作者： S.G.wang M.Sun y.h.x. K.Long z.d.zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences

The localiz.d.and uniform corrosion resistances of bulk nanocrystalline 304 stainless steel（NC-304 SS）produced by severe rolling technique, and its conventional polycrystalline 304 stainless steel（CC-304 SS）counterpart, were investigated in high-concentration hydrochloric acid solutions at room ***-304 SS can scarcely suffer from localiz.d.corrosion in 4 mol/L and 5 mol/L hCl solutions during 5-d.y.immersion tests, and in 1-3 mol/L hCl solutions during thirty-five-d.y.immersion tests. The corrosion rate of NC-304 SS was also less than that of CC-304 SS during these immersion tests. The improved localiz.d.and uniform corrosion resistances of NC-304 SS were ex.lained in terms of the adsorption and chemical activity of Cl;on NC-304 SS and CC-304 SS characteriz.d.by x.ray photoelectron spectroscopy,and the valence electron configurations of NC-304 SS and CC-304 SS were characteriz.d.by ultra-violet photoelectron spectroscopy rather than conventional electrochemical results.

关键词： Stainless steels Localiz.d.corrosion Severe rolling technique x.ray photoelectron spectroscopy Ultra-violet photoelectron spectroscopy

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Embedding laser-generated CdTe nanocrystals into ultrathin znIn_(2)S_(4) nanosheets with sulfur vacancies for boosted photocatalytic h_(2) evolution

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Journal of Materials Science & Technology 2023年第35期166卷 113-122页

作者： z.G.Tai G.T.Sun x.h.zhang x.B.yang T.wang z.y.Fang Q.ye L.C.Jia h.Q.wang State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Research&development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518063China School of Materials Science and Engineering Shaanxi Normal UniversityXi’an 710119China

To suppress the inner charge recombination and inject vast electrons,CdTe nanocrystals are embedded into ultrathin znIn_(2)S_(4) nanosheets to construct znIn_(2)S_(4)/CdTe heterostructures,where the nanocrystals are generated by a laser irradiation *** optimal znIn_(2)S_(4)/CdTe heterojunction ex.ibits an ex.ellent catalytic activity of 24.3 mmol/h/g,which is relatively high among the znIn_(2)S_(4)-based photocatalysts with-out noble *** enhancement is ascribed to a win-win mechanism of nanoscale heterojunctions and sulfur *** strong electron coupling effect,which is verified by density functional the-ory(dFT)calculations,impels the photo-generated electrons transfer from CdTe to znIn_(2)S_(4),boosting the charge ***,the sulfur vacancies ex.sting in znIn_(2)S_(4) can capture photoelectrons and act as active sites,facilitating the h_(2) generation *** addition,the znIn_(2)S_(4) base and the znIn_(2)S_(4)/CdTe heterojunction also possess an evident photothermal effect and renewable cycle phenomena,enhancing the photocatalytic *** research provides new insights into the regulation of charge transfer through embedding nanocrystals.

关键词： Photocatalysis hydrogen evolution Laser irradiation heterostructure Sulfur vacancies

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Synchronous optimization of strengths, ductility and corrosion resistances of bulk nanocrystalline 304 stainless steel

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Journal of Materials Science & Technology 2020年第2期37卷 161-172页

作者： S.G.wang M.Sun S.y.Liu x.Liu y.h.x. C.B.Gong K.Long z.d.zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

Structural materials usually suffer from several attacks during their service,such as tension,fatigue and *** is necessary to synchronously improve these properties for their lightweight and longlifetime,but corrosion resistance and ductility are generally inverse correlation with strength,it is very difficult to simultaneously optimize all three ***,bulk nanocrystalline 304 stainless steel(BN-304SS)produced by severe rolling technology possessed the larger yield and ultimate tensile strengths with sufficient elongation(>40%)during tensile test,the larger saturation stress and longer lifetime during low-cycle fatigue,the enhanced uniform and pitting corrosion resistances during fived.y.immersion test in 6 mol/L hCl,the lowered stress corrosion cracking(SCC)susceptibility with larger yield(~2.40 GPa)and ultimate tensile(~2.66 GPa)strengths,and enough elongation(>30%)during stress corrosion in comparison with conventional polycrystalline 304 stainless steel(CP-304 SS)*** uniform and pitting corrosion resistances of fractured BN-304SS were enhanced in comprsion with those of fractured CP-304 SS during seven-d.y.immersion test in 1 mol/L *** results demonstrated the strengths,ductility and corrosion resistances of BN-304SS can be simultaneously optimiz.d.by severe rolling *** improved results of BN-304SS in different disciplines were understood by its valence electron configurations rather than traditional microstructural parameters.

关键词： Stainless steel Pitting corrosion Stress corrosion Tensile properties Low-cycle fatigue Severe rolling technology

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What is going on in magnesium alloys？

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Journal of Materials Science & Technology 2018年第2期34卷 245-247页

作者： x.J. wang d.K. x. R.z. Wu x.B. Chen Q.M. Peng L. Jin y.C. x.n z.Q. zhang y. Liu x.h. Chen G. Chen K.K. deng h.y. wang School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China Key Laboratory of Superlight Materials & Surface Technology (Ministry of Education) Harbin Engineering University Harbin 150001 China School of Engineering RMIT University City Campus Carlton VIC 3053 Australia State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China National Engineering Research Center of Light Alloy Net Forming Shanghai Jiao Tong University Shanghai 200240 China College of Materials Science and Engineering Chongqing University Chongqing 400030 China Key Lab of Electromagnetic Processing of Materials Ministry of Education Northeastern UniversityShnenyang 110819China Key Laboratory of Lightweight and high Strength Structural Materials of Jiangx. Province Nanchang University Nanchang 330031 China School of Chemical Engineering and Technology Tianjin University Tianjin 300350 China Shanx. Key Laboratory of Advanced Magnesium-Based Materials Taiyuan University of Technology Taiyuan 030024 China Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering Jilin University Changchun 130025 China

China has been developed into one of the most active regions in terms of both fundamental and applied research on magnesium （Mg） and its alloys in the world from a solid base laid by its prominent metallurgist and materials scientists over the past decades. Nowad.y., a large number of young-generation researchers have been inspired by their predecessors and become the key participants in the fields of Mg alloys, which consequently led to the establishment of China youth Scholar Society for Magnesium Alloys Research in 2015. Since then, the first two China youth Scholars Symposiums on Mg Alloys Research had been held at harbin （2015） and Chongqing （2016） China, respectively. A number of crucial research inter- ests related to fundamental and applied Mg research were discussed at the conferences and summariz.d.in this short perspective, aiming to boost far-reaching initiatives for development of new Mg-based materials to satisfy the requirements for a broad range of industrial employments. herein, four main aspects are included as follows： i） Plastic deformation mechanism and strengthening strategy, ii） design and development of new Mg-based materials, iii） Key service properties, and iv） New processing technologies.

关键词： Mg alloys Plastic deformation Strengthening Alloying design high performance Corrosion Fatigue behavior Creep Processing technologies Purification

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Metal–organic frameworks and their derivatives for optimizing lithium metal anodes

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eScience 2024年第4期4卷 7-26页

作者： zhaoyang wang zijuan du yiyang Liu Caroline EKnapp yuhang dai Jianwei Li Wei zhang Ruwei Chen Fei Guo Wei zong x.an Gao Jiex.n zhu Chuanliang Wei Guanjie he Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology College of Chemistry EngineeringLiaocheng UniversityLiaocheng 252059China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Christopher Ingold Laboratory Department of ChemistryUniversity College LondonLondon WC1H 0AJUK School of Chemistry and Chemical Engineering Shandong UniversityJinan 250061China Key Laboratory of Comprehensive and highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of Sciences(CAS)Xining 810008China

Lithium metal anodes(LMAs)have been considered the ultimate anode materials for nex.-generation ***,the uncontrollable lithium dendrite growth and huge volume ex.ansion that can occur during charge and discharge seriously hinder the practical application of ***–organic framework(MOF)materials,which possess the merits of huge specific surface area,ex.ellent porosity,and flex.ble composition/structure tunability,have demonstrated great potential for resolving both of these *** article first ex.lores the mechanism of lithium dendrite formation as described by four influential ***,based on an in-depth understanding of these models,we propose potential strategies for utilizing MOFs and their derivatives to suppress lithium dendrite *** then provide a comprehensive review of research progress with respect to various applications of MOFs and their derivatives to suppress lithium dendrites and inhibit volume *** paper closes with a discussion of perspectives on future modifications of MOFs and their derivatives to achieve stable and dendrite-free lithium metal batteries.

关键词： Metal–organic frameworks Lithium metal batteries Lithium metal anodes Lithium dendrite formation mechanism Lithium dendrite inhibition strategy

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Two-stage double peaks ageing and its effect on stress corrosion cracking susceptibility of Al-zn-Mg alloy

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Journal of Materials Science & Technology 2018年第7期34卷 1250-1257页

作者： y.L.wang h.C.Jiang z.M.Li d.S.yan d.zhang L.J.Rong CAS Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal Research Chinese Academy of Sciences School of Materials Science and Engineering University of Science and Technology of China

different artificial two-stage ageing behaviors and their effect on stress corrosion cracking （SCC） susceptibility of AI-zn-Mg alloy have been investigated. The ex.erimental results show that two hardness peaks present on the second-stage ageing-hardening curve when the first-stage ageing is dealt with comparatively lower temperature than the conventional one. The first peak is caused by dispersive and evenly distributed G.P. zones, while η ′phases and coarsened G.P. zones contribute to the second peak. Tensile strength of ex.erimental alloy raises 9.6% （33.2 MPa） and SCC susceptibility decreases 38.9% by applying the second peak ageing regime instead of conventional T73. AI-zn-Mg alloy obtains high strength and SCC resistance due to its finely dispersive matrix.precipitates （MPts）, coarsened and discontinuous grain boundary precipitates （GBPs）, as well as the narrow precipitate free zone （PFz） in the second peak ageing condition. 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science ＆ Technology.

关键词： Al-zn-Mg alloy Two-stage ageing double peaks ageing Stress corrosion cracking (SCC) susceptibility Grain boundary precipitates (GBPs)

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Recent development of chemically complex.metallic glasses: from accelerated compositional design, additive manufacturing to novel applications

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Materials Futures 2022年第1期1卷 9-31页

作者： J y zhang z Q zhou z B zhang M h Park Q yu z Li J Ma A d wang h G huang M Song B S Guo Q wang y yang department of Mechanical Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople’s Republic of China Shenzhen Key Laboratory of high Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhenGuangdong 518060People’s Republic of China School of Materials Science and Engineering Dongguan University of TechnologyDongguanGuangdong 523808People’s Republic of China Institute of Materials China Academy of Engineering PhysicsJiangyouSichuan 621907People’s Republic of China State Key Laboratory of Powder Metallurgy Central South UniversityChangshaHunan 410083People’s Republic of China Institute of Advanced Wear&Corrosion Resistant and Functional Materials Jinan UniversityGuangzhouGuangdong 510632People’s Republic of China Institute of Materials Laboratory for MicrostructuresShanghai UniversityShanghai 200444People’s Republic of China department of Materials Science and Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople’s Republic of China department of Advanced design and System Engineering College of EngineeringCity University of Hong KongKowloon TongKowloonHong KongPeople’s Republic of China

Metallic glasses(MGs)or amorphous alloys are an important engineering material that has a history of research of about 80–90 *** different fast cooling methods were developed for multi-component MGs between 1960s and 1980s,1990s witnessed a surge of research interest in the development of bulk metallic glasses(BGMs).Since then,one central theme of research in the metallic-glass community has been compositional design that aims to search for MGs with a better glass forming ability,a larger size and/or more interesting properties,which can hence meet the demands from more important *** this review article,we focus on the recent development of chemically complex.MGs,such as high entropy MGs,with new tools that were not available or mature yet until recently,such as the state-of-the-art additive manufacturing technologies,high throughput materials design techniques and the methods for big data analyses(*** learning and artificial intelligence).We also discuss the recent use of MGs in a variety of novel and important applications,from personal healthcare,electric energy transfer to nuclear energy that plays a pivotal role in the battle against global warming.

关键词： metallic glasses amorphous alloys alloy design additive manufacturing machine learning high throughput materials design

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Effect of heat-input on pitting corrosion behavior of friction stir welded high nitrogen stainless steel

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Journal of Materials Science & Technology 2019年第7期35卷 1278-1283页

作者： h.zhang P.x.e d.wang L.h.Wu d.R.Ni B.L.x.ao z.y.Ma Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences

In this study, different welding param eters were selected to investigate the effects of heat-in put on the microstructure and corrosion resistance of the friction stir welded high nitrogen stainless steel joints. The results show ed that, the welding speed had major influence on the duration at elevated tem perature rather than the peak tem perature. The hardness distribution and tensile properties of the nugget zones (Nzs) for various joints were very similar while the pitting corrosion behavior of various Nzs showed major differences. Large heat-input resulted in the ferrite bands being the pitting location, while tool wear bands were sensitive to pitting corrosion in the low heat-input joints. Cr diffusion and tool wear were the main reasons for pitting. The mechanisms of pitting corrosion in the Nzs were analyz.d.in detail.

关键词： high nitrogen stainless steel Friction stir welding Mechanical properties Corrosion resistance heat-input

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