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Investigation on Strengthening Mechanism of China Low-Activation Ferrite Steel upon Thermo-Mechanical Treatment

Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 373-387页

作者： Dongtian Yang Liangyin Xiong Hongbin liao Guoping Yang xiaoyu Wang Shi Liu Institute of Metal Research Chinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Center for Fusion Science Southwestern Institute of PhysicsChengdu610041China

The objective of this study was to investigate the influence of strengthening mechanisms on the high-temperature mechanical properties of China low-activation ferrite(CLF-1)steel,which underwent thermodynamic design and thermo-mechanical treatment(TMT).The microstructure characterization in the normalized and tempered condition and the TMT condition was carried out using optical microscopy,X-ray diffractometer,and scanning electron microscopy with electron backscatter diffraction.High-resolution transmission electron microscopy was employed to determine the crystallographic structures of precipitated phases.The results indicated that the addition of Ti led to an increase in the allocation of C in MC phase and an enhancement in the content of MC phase.Compared to CLF-P steel in the normalized and tempered condition,a 1.5-fold increase in dislocation density and an order of magnitude improvement in MX phase density were achieved after TMT.The formation of high-density nano-scale MC phases during TMT played a significant role in precipitation strengthening due to their favorable coherent relationship with the matrix and low interfacial free energy.The excellent high-temperature mechanical properties observed in CLF-P steel after TMT can be attributed to the combined effects of precipitation strengthening,dislocation strengthening,and lath strengthening.

关键词： China low-activation ferrite(CLF-1)steel Thermo-mechanical treatment MC phase Crystallographic structure Strengthening mechanism

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Characterization, preparation, and reuse of metallic powders for laser powder bed fusion: a review

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International Journal of Extreme Manufacturing 2024年第1期6卷 52-91页

作者： xiaoyu Sun Minan Chen Tingting Liu Kai Zhang Huiliang Wei Zhiguang Zhu Wenhe liao School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing 210094People’s Republic of China

Laser powder bed fusion(L-PBF) has attracted significant attention in both the industry and academic fields since its inception, providing unprecedented advantages to fabricate complex-shaped metallic components. The printing quality and performance of L-PBF alloys are infuenced by numerous variables consisting of feedstock powders, manufacturing process,and post-treatment. As the starting materials, metallic powders play a critical role in infuencing the fabrication cost, printing consistency, and properties. Given their deterministic roles, the present review aims to retrospect the recent progress on metallic powders for L-PBF including characterization, preparation, and reuse. The powder characterization mainly serves for printing consistency while powder preparation and reuse are introduced to reduce the fabrication costs.Various powder characterization and preparation methods are presented in the beginning by analyzing the measurement principles, advantages, and limitations. Subsequently, the effect of powder reuse on the powder characteristics and mechanical performance of L-PBF parts is analyzed, focusing on steels, nickel-based superalloys, titanium and titanium alloys, and aluminum alloys. The evolution trends of powders and L-PBF parts vary depending on specific alloy systems, which makes the proposal of a unified reuse protocol infeasible. Finally,perspectives are presented to cater to the increased applications of L-PBF technologies for future investigations. The present state-of-the-art work can pave the way for the broad industrial applications of L-PBF by enhancing printing consistency and reducing the total costs from the perspective of powders.

关键词： laser powder bed fusion powder characterization powder preparation powder reuse

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Exploring the Mechanism,Advancements,and Application of Thermogalvanic Effect in Hydrogels

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Chinese Journal of Chemistry 2024年第5期42卷 543-556页

作者： xiaoyu Yang Peng Wang Xiaolong Wu Yongli liao Senyun Liu Wei Duan Ying Yue School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBaodingHebei071000 China Hebei Key Laboratory of Electric Machinery Health Maintenance & Failure Prevention North China Electric Power UniversityBaodingHebei071003 China Electric Power Research Institute China South Power GridGuangzhouGuangdong510000 China Key Laboratory of Icing and Anti/De-icing China Aerodynamics Research and Development CenterMianyangSichuan621000 China

The issue of energy consumption has garnered significant interest due to its excessive usage.Recently,thermoelectric devices have been getting increased attention,as they can harness waste heat from various sources,such as solar radiation,human body,and industrial processes.Traditionally,the recovery of low-grade heat has been a challenge,resulting in unsustainable energy use and significant losses.While considerable advances have been made in thermoelectric materials in recent decades,the majority of these devices still primarily employ semiconductors.Nevertheless,the emergence of quasi-solid-state thermoelectric materials represents a novel development with profound promise for the environment and society.These materials offer several advantages,such as improved energy conversion capacities,cost-effectiveness,versatility,and scalability,to support increased usage.Additionally,this review explores the application of thermoelectric materials in self-powered sensors,integrated modules,and heat harvesting management.Lastly,the potential of high-performance thermocouples based on thermogalvanic effects is assessed,along with the challenges that must be overcome to realize this goal.

关键词： Hydrogel Thermogalvanic effect Thermochemistry Electrolytes Flexible electronics

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Diagnostic Study of an Extreme Explosive Cyclone over the Kuroshio/Kuroshio Extension Region

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Journal of Ocean University of China 2024年第3期23卷 605-617页

作者： ZHANG Shuqin liao Qinghua LIU Chunlei GAO xiaoyu LONG Jingchao LI Pengyuan XU Jianjun College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088China South China Sea Institute of Marine Meteorology Guangdong Ocean UniversityZhanjiang 524088China CMA-GDOU Joint Laboratory for Marine Meteorology Guangdong Ocean UniversityZhanjiang 524088China Key Laboratory of Climate Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong ProvinceGuangdong Ocean UniversityZhanjiang 524088China State Key Laboratory of Severe Weather Chinese Academy of Meteorological SciencesBeijing 100081China Department of Marine Meteorology Ocean-Atmosphere Interaction and Climate LaboratoryKey Laboratory of Physical OceanographyOcean University of ChinaQingdao 266100China

Explosive cyclones(ECs)occur frequently over the Kuroshio/Kuroshio Extension region.The most rapidly intensified EC over the Kuroshio/Kuroshio Extension region during the 42 years(1979-2020)of cold seasons(October-April)was studied to reveal the variations of the key factors at different explosive-developing stages.This EC had weak low-level baroclinicity,mid-level cyclonic-vorticity advection,and strong low-level water vapor convergence at the initial explosive-developing stage.The low-level baroclinicity and mid-level cyclonic-vorticity advection increased substantially during the maximum-deepening-rate stage.The diagnostic analyses using the Zwack-Okossi equation showed that diabatic heating was the main contributor to the initial rapid intensification of this EC.The cyclonic-vorticity advection and warm-air advection enhanced rapidly in the middle and upper troposphere and contributed to the maximum rapid intensification,whereas the diabatic heating weakened slightly in the mid-low troposphere.The relative contribution of the diabatic heating decreased from the initial explosive-developing stage to the maximum-deepening-rate stage due to the enhancement of other factors(the cyclonic-vorticity advection and warm-air advection).Furthermore,the physical factors contributing to this EC varied with the explosive-developing stage.The non-key factors at the initial explosive-developing stage need attention to forecast the rapid intensification.

关键词： explosive cyclone diabatic heating cyclonic-vorticity advection rapid intensification the Kuroshio/Kuroshio Extension region

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In-situ construction of epitaxial phase for boosting zinc nucleation on three-dimensional interface

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Progress in Natural Science:Materials International 2024年第3期34卷 578-584页

作者： Xin He Zhe Zhu Xiaoqiao liao Kai Yang Yixue Duan Linfeng Lv Chuan Zhao Wei Zhao Jibing Chen Peng Tian xiaoyu Liu Liang He School of Mechanical Engineering State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering Sichuan University School of Chemistry Faculty of Science University of New South Wales School of Materials Science and Engineering Sichuan University of Science & Engineering School of Mechanical Engineering Wuhan Polytechnic University Med+X Center for Manufacturing West China Hospital Sichuan University Yibin Industrial Technology Research Institute of Sichuan University Yibin R&D Park of Sichuan University

Interface modification of zinc（Zn） metal anode with conductive three-dimensional（3D） structure is widely utilized in zinc ion batteries. However, the uniformity of zinc nucleation on surface microstructure is rarely investigated which exacerbates the tip effect and raises unstable risk. Herein, a strategy via the initial copper（Cu）alloying and following sulfurization treatment is reported to accomplish boosted uniform nucleation of zinc on the modified layer with dense microstructures. This epitaxial sulfide phase not only improves the wetting area to revitalize the microstructural surface, but also forms a bifunctional zincophilic Cu2S/CuZn alloy interface layer,which combines the merits of guided local ions diffusion and improved zinc nucleation environment. As a result, a homogeneous growth of zinc on the 3D structural substrate can be realized, and cycling stability of the achieved Cu2S/CuZn electrode with a practical capacity of 1 mAh cm-2under 1 mA cm-2or amplified current density of 10 mA cm-2is significantly enhanced. This work provides an epitaxial strategy in constructing a bifunctional zincophilic interface layer for boosting zinc nucleation, and offers a new perspective on the modification of 3D surface structure for stabilization of zinc anode.

关键词： CuZn alloy Hydrophilicity Sulfide Zn anode Zn metal battery

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RIOX1-demethylated cGAS regulates ionizing radiation-elicited DNA repair

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Bone Research 2022年第2期10卷 367-377页

作者： Yanxuan Xiao Jingyi Li xiaoyu liao Yumin He Tao He Cuiping Yang Lu Jiang So Mi Jeon Jong-Ho Lee Yongbin Chen Rui Liu Qianming Chen State Key Laboratory of Oral Diseases National Clinical Research Center for Oral DiseasesChinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and ManagementWest China Hospital of StomatologySichuan UniversityChengduSichuan 610041China The Second Affiliated Hospital of Chengdu Medical College China National Nuclear Corporation 416 HospitalChengduSichuan 610051China School of Biological Sciences and Technology Chengdu Medical CollegeChengdu 610599China Department of Cardio-thoracic Surgery the Second Affiliated Hospital of Chengdu Medical CollegeChina National Nuclear Corporation 416 HospitalChengduSichuan 610051China Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Sciences Yunnan Province Kunming Institute of ZoologyKunmingYunnan 650223China Department of Health Sciences The Graduate School of Dong-A UniversityBusan 49315Republic of Korea Department of Biological Sciences Dong-A UniversityBusan 49315Republic of Korea Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunmingYunnan 650223China

Exposure to radiation causes DNA damage;hence, continuous surveillance and timely DNA repair are important for genome stability. Epigenetic modifications alter the chromatin architecture, thereby affecting the efficiency of DNA repair. However, how epigenetic modifiers coordinate with the DNA repair machinery to modulate cellular radiosensitivity is relatively unknown. Here, we report that loss of the demethylase ribosomal oxygenase 1(RIOX1) restores cell proliferation and reduces cell death after exposure to ionizing radiation. Furthermore, RIOX1 depletion enhances homologous recombination(HR) repair but not nonhomologous endjoining(NHEJ) repair in irradiated bone marrow cells and oral mucosal epithelial cells. Mechanistic study demonstrates that RIOX1 removes monomethylation at K491 of cyclic GMP-AMP synthase(c GAS) to release c GAS from its interaction with the methyl-lysine reader protein SAGA complex-associated factor 29(SGF29), which subsequently enables c GAS to interact with poly(ADP-ribosyl)ated poly(ADP-ribose) polymerase 1(PARP1) at DNA break sites, thereby blocking PARP1-mediated recruitment of Timeless. High expression of RIOX1 maintains c GAS K491 me at a low level, which impedes HR repair and reduces cellular tolerance to ionizing radiation. This study highlights a novel RIOX1-dependent mechanism involved in the non-immune function of c GAS that is essential for the regulation of ionizing radiation-elicited HR repair.

关键词： thereby repair remove

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Terahertz metalens of hyper-dispersion

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Photonics Research 2022年第4期10卷 886-895页

作者： Fen Zhao Ziping Li Sheng Li Xuemei Dai Yi Zhou xiaoyu liao JCCao Gaofeng Liang Zhengguo Shang Zhihai Zhang Zhongquan Wen Hua Li Gang Chen Key Laboratory of Optoelectronic Technology and Systems(Chongqing University) Ministry of EducationSchool of Optoelectronic EngineeringChongqing UniversityChongqing 400044China Key Laboratory of Terahertz Solid State Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China

Chromatic optical lenses have promising applications in three-dimensional imaging, which allows fast spectral tomography without mechanical moving parts. The scanning range of current chromatic optical lenses is limited by their dispersion ability. The recent development in metasurfaces provides ideal blocks for optical wavefront manipulation and dispersion engineering of artificial materials at sub-wavelength scales. Hyper-dispersive metalenses can be realized by utilizing dispersive meta-atoms, which have enhanced dispersion compared to regular diffractive lenses. This is critical for increasing the imaging depth of fast spectral tomography. In this work, a hyper-dispersive metalens is realized with a chromatic dispersion 1.76 times greater than that of a regular diffractive metalens in the THz frequency range of 2.40–2.61 THz by simultaneously controlling the frequencydependent phase, group delay(GD), and GD dispersion of the metalens. This approach can also be extended to other optical spectra and improve the performance of spectral tomography.

关键词： dispersion moving chromatic

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FGF8 induces epithelial-mesenchymal transition and promotes metastasis in oral squamous cell carcinoma

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International Journal of Oral Science 2021年第1期13卷 71-78页

作者： Yilong Hao Yanxuan Xiao xiaoyu liao Shuya Tang Xiaoyan Xie Rui Liu Qianming Chen The Affiliated Hospital of Stomatology School of StomatologyZhejiang University School of Medicine and Key Laboratory of Oral Biomedical Research of Zhejiang ProvinceHangzhouChina State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases&Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management&West China Hospital of Stomatology Sichuan UniversityChengduChina Department of Stomatology The Second Xiangya HospitalCentral South UniversityChangshaChina

Oral squamous cell carcinoma(OSCC)is one of the most common cancers worldwide,and with 354864 new cases each year.Cancer metastasis,recurrence,and drug resistance are the main causes to cripples and deaths of OSCC patients.As potent growth factors,fibroblast growth factors(FGFs)are frequently susceptible to being hijacked by cancer cells.In this study,we show that FGF8 is upregulated in OSCC tissues and high FGF8 expression is related with a set of clinicopathologic parameters,including age,drinking,and survival time.FGF8 treatment enhances the invasive capability of OSCC cells.Lentivirus-based FGF8 expression promotes OSCC metastasis in a mouse lung metastasis model.Further,mechanistic study demonstrates that FGF8 induces epithelial–mesenchymal transition(EMT)in OSCC cells.These results highlight a pro-metastatic function of FGF8,and underscore the role of FGF8 in OSCC development.

关键词： metastasis squamous lung

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湖南省农业科技园区创新发展能力多维评价研究

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经济地理 2024年第1期44卷 139-147页

作者：刘灿廖婷谭力铭雷筱娱石琳湘潭大学商学院湖南湘潭411105 湖南省科学技术信息研究所湖南长沙410001

文章从创新研发、创新服务、创新带动、创新驱动4个维度选取18个要素指标,构建农业科技园区(以下简称“农科园”)创新发展能力评价指标体系,运用多因子加权综合评价法、GIS空间分析法、K聚类分析等方法对湖南省42家农业科技园区的创新... 详细信息

文章从创新研发、创新服务、创新带动、创新驱动4个维度选取18个要素指标,构建农业科技园区(以下简称“农科园”)创新发展能力评价指标体系,运用多因子加权综合评价法、GIS空间分析法、K聚类分析等方法对湖南省42家农业科技园区的创新发展能力进行空间布局和分层分类分析。结果表明:(1)湖南省农科园的创新发展能力呈现出以长株潭为核心、各市(州)国家级农科园为散点的“一核多点”式布局特征,全省农科园整体创新带动能力较强、创新研发能力相对较弱。(2)湖南省42家农科园可分为三类,其中13家国家农科园为创新发展引领类农科园,浏阳、祁东等21家农科园为创新发展稳健类农科园,临湘、南县等8家农科园为创新发展起步类农科园。建议湖南省对照国家农科园“333”布局,加大农科园培育力度,完善层次分明的农科园体系;提升农科园自主创新能力,打造农业产业集群;建立常态化的全省农科园创新发展能力监测评价与服务机制。

关键词：农业科技园区创新发展能力 GIS空间分析多因子加权 K聚类分析

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Host-guest co-assembly triggered turn-on and ratiometric sensing of berberine and its detoxicating

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Chinese Chemical Letters 2021年第4期32卷 1385-1389页

作者： Chuanfeng Liu Zhixin Li Hai Yu Naibin Cui xiaoyu liao Haibin Zhang Zhengning Shu Peng Yang Wuya College of Innovation Shenyang Pharmaceutical UniversityShenyang 110016China School of Traditional Chinese Materia Medica Shenyang Pharmaceutical UniversityShenyang 110016China

Fluorescent sensing for specific detection of berberine is an important issue in view of its potential jeopardization to food safety and human health,but remains less investigated.To the best of our knowledge,there is no fluorescence turn-on and ratiometric sensors available for specific detection of berberine.In this study,calix[4]carbazole(3)has been synthesized and its property of recognizing berberine ha s been evaluated by UV-vis,fluorescence,NMR,DLS and TEM techniques.The results show that 3 selectively recognizes berberine among the tested drugs and detects it with turn-on and ratiometric fluorescence due to their co-assembly nature.Moreover,3 is not only low toxic and can reduce toxicity of berberine to human normal liver L02 cell,but also can release berberine to tumor HepG2 cells at acid micro-environment.It therefore holds a great potential for further exploration。

关键词： Recognition Macrocycle Host-guest Sensor Carbazole

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