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Characteristics of the microbial communities regulate soil multi-functionality under different cover crop amendments in Ultisol

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Journal of Integrative Agriculture 2024年第6期23卷 2099-2111页

作者： Guilong Li Xiaofen Chen Wenjing Qin Jingrui Chen Ke Leng Luyuan sun Ming Liu Meng Wu Jianbo Fan changxu Xu Jia Liu Soil and Fertilizer&Resources and Environment Institute Jiangxi Academy of Agricultural SciencesNanchang 330200China Key Laboratory of Acidified Soil Amelioration and Utilization Ministry of Agriculture and Rural AffairsNanchang 330200China Ecological Experimental Station of Red Soil Chinese Academy of SciencesYingtan 335211China

The use of cover crops is a promising strategy for influencing the soil microbial consortium,which is essential for the delivery of multiple soil functions(i.e.,soil multifunctionality).Nonetheless,relatively little is known about the role of the soil microbial consortium in mediating soil multifunctionality under different cover crop amendments in dryland Ultisols.Here,we assessed the multifunctionality of soils subjected to four cover crop amendments(control,non-amended treatment;RD,radish monoculture;HV,hairy vetch monoculture;and RDHV,radish-hairy vetch mixture),and we investigated the contributions of soil microbial richness,network complexity,and ecological clusters to soil multifunctionality.Our results demonstrated that cover crops whose chemical composition differed from that of the main plant crop promoted higher multifunctionality,and the radish-hairy vetch mixture rendered the highest enhancement.We obtained evidence that changes in soil microbial richness and network complexity triggered by the cover crops were associated with higher soil multifunctionality.Specifically,specialized microbes in a key ecological cluster(ecological cluster 2)of the soil microbial network were particularly important for maintaining soil multifunctionality.Our results highlight the importance of cover crop-induced variations in functionally important taxa for promoting the soil multifunctionality of dryland Ultisols.

关键词： cover crops soil multifunctionality microbial richness network complexity ecological cluster

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Solid electrolyte interphase on anodes in rechargeable lithium batteries

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Nano Research 2023年第9期16卷 11589-11603页

作者： Lihua Chu Yuxin Shi Ze Li changxu sun Hao Yan Jing Ma Xuchen Li Chaofeng Liu Jianan Gu Kai Liu Lehao Liu Bing Jiang Yingfeng Li Meicheng Li School of New Energy North China Electric Power UniversityBeijing 102206China School of Materials Science and Engineering Tongji UniversityShanghai 201804China

Highly safe and efficient rechargeable lithium batteries have become an indispensable component of the intelligent society powering smart electronics and electric vehicles.This review summarizes the formation principle,chemical compositions,and theoretical models of the solid electrolyte interphase(SEI)on the anode in the lithium battery,involving the functions and influences of the electroactive materials.The discrepancies of the SEI on different kinds of anode materials,as well as the choice and design of the electrolytes are detailedly clarified.Furthermore,the design strategies to obtain a stable and efficient SEI are outlined and discussed.Last but not least,the challenges and perspectives of artificial SEI technology are briefly proposed for the development of high-efficiency batteries in practice.

关键词： solid electrolyte interphase(SEI) lithium batteries anode materials electrolyte dendrite

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Resistive-type sensors based on few-layer MXene and SnO_(2)hollow spheres heterojunctions:Facile synthesis,ethanol sensing performances

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中国化学快报:英文版 2023年第8期34卷 502-507页

作者： Lihua Chu Hao Yan Wanfeng Xie Yuxin Shi Muhammad Hilal changxu sun Ze Li Meicheng Li School of New Energy North China Electric Power UniversityBeijing 102206China College of Electronics and Information University-Industry Joint Center for Ocean Observation and Broadband CommunicationQingdao UniversityQingdao 266071China Department of Physics Dongguk UniversitySeoul 04620Republic of Korea

High-performance and low-cost gas sensors are highly desirable and involved in industrial production and environmental detection.The combination of highly conductive MXene and metal oxide materials is a promising strategy to further improve the sensing performances.In this study,the hollow SnO_(2)nanospheres and few-layer MXene are assembled rationally via facile electrostatic synthesis processes,then the SnO_(2)/Ti_(3)C_(2)T_(x)nanocomposites were obtained.Compared with that based on either pure SnO_(2)nanoparticles or hollow nanospheres of SnO_(2),the SnO_(2)/Ti_(3)C_(2)T_(x)composite-based sensor exhibits much better sensing performances such as higher response(36.979),faster response time(5 s),and much improved selectivity as well as stability(15 days)to 100ppm C2H5OH at low working temperature(200°C).The improved sensing performances are mainly attributed to the large specific surface area and significantly increased oxygen vacancy concentration,which provides a large number of active sites for gas adsorption and surface catalytic reaction.In addition,the heterostructure interfaces between SnO_(2)hollow spheres and MXene layers are beneficial to gas sensing behaviors due to the synergistic effect.

关键词： Heterostructure Few-layer MXene SnO_(2)hollow spheres Ethanol sensor Synergistic effect SnO_(2)/Ti_(3)C_(2)T_(x)composites

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Martensite decomposition under thermal-mechanical coupling conditions to fabricate an ultrafine-grained Ti6Al4Mo4Zr1W0.2Si alloy

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Journal of Materials Science & Technology 2024年第1期168卷 157-168页

作者： Taoyu Zhou Jiuxu Yang Nan Li Hao sun Bohua Zhang Zibo Zhao Qingjiang Wang Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

The fabrication of ultrafine-grained microstructures(grain size below 1μm)in titanium alloys is beneficial for improving their mechanical properties at room temperature and medium tempera-tures(400-550°C).However,a long-standing challenge involves the low-cost manufacturing of bulk ultrafine-grained titanium alloys.In this work,we developed a facile strategy through martensite de-composition at thermal-mechanical coupling conditions,to fabricate an equiaxed microstructure in a Ti6Al4Mo4Zr1W0.2Si model alloy with an averageαgrain size of 315±62 nm.The formation of the ultrafine-grained microstructure was because the lattice strain stored in the martensitic initial mi-crostructure enhanced the nucleation rate of dynamic recrystallization,meanwhile,the pinning role of martensite decomposition productsβand(Ti,Zr)_(5)Si_(3)phases suppressed grain coarsening at high tem-peratures.Compared to conventional(α+β)alloys,the tensile strength of this alloy improved by 20%-30%at both room temperature and 550°C,without decreasing its ductility.In situ SEM observations revealed that the ultrafine-grained microstructure would not only suppress dislocation motions but also contribute to the homogenous deformation in the matrix of the material,therefore,it resulted in higher mechanical performance.The research results may be of great significance to the development of next-generation aviation titanium alloys.

关键词： Ultrafine-grained Titanium alloy In situ observation Deformation mechanism Thermostability

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High-Speed Rubbing Behavior of Abrasive Coating Coated on Titanium Alloy Blade Tips

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Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 749-762页

作者： Wenshuang Gu Shuai Yang Shiyi Zhang Zhiliang Pei Weihai Xue Deli Duan Jun Gong Chao sun Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China

In aero-engines, abrasive coatings are typically utilized to protect the blade tip from excessive wear caused by the harder abradable sealing coating and thereby improve the sealing performance of engines. Therefore, a Ni/cBN abrasive coating was prepared on titanium alloy using electrodeposition. The high-speed rubbing tests with a linear velocity of 350 m/s and different incursion rates were performed to investigate the effect of the Ni/cBN abrasive coating on the wear behavior against NiCrAl/diatomite seal coating. Results showed that melting wear and adhesive transfer occurred on the bare blades, causing the bare blade to suffer excessive wear. While the Ni/cBN abrasive coating exhibited superior wear resistance and cutting performance. The cBN grits pullout, the abrasion of Ni matrix and transfer of seal coating to the cBN grits were the main wear mechanism of the Ni/cBN abrasive coating. Additionally, it was found that the relationship between the incursion rate and high-speed rubbing behavior is quite different for the bare blade and Ni/cBN coating. The reason for the difference in wear behavior of bare blade and Ni/cBN coating at different incursion rates was discussed in detail.

关键词： Gas turbine sealing Abrasive coating High-speed rubbing Material transfer Abradable coating

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Facile preparation of a SiC@SiO_(2)nanowire-toughened ZrB_(2)-SiC/SiC bilayer coating with good interfacial bonding,high toughness,and excellent cyclic ablation resistance on C/CA composites

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Journal of Advanced Ceramics 2024年第4期13卷 486-495页

作者： Meng Yan Chenglong Hu Jian Li Shengyang Pang Bohui sun Rida Zhao Bin Liang Rui Luo Sufang Tang Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

Preparing antioxidant coatings to address the inherent oxidation sensitivity of carbon fiber-reinforced carbon aerogel(C/CA)composites is a feasible way to promote their application in oxidizing environments as thermal insulation materials.However,preparing the coatings with excellent oxidation and ablation resistance while avoiding evident damage to the C/CA substrate still remains a challenge.Herein,a SiC@SiO_(2)nanowire-toughened ZrB2–SiC/SiC bilayer coating with a large thickness of 500μm was prepared on C/CA using a one-step low-temperature reaction sintering method,which simultaneously formed a sintered outer layer with even-distributed nanowires and a siliconized gradient inner layer.By courtesy of the synergic thermal response of the layers and the crack deflection induced by the nanowires,the resulting coating has moderate residual compressive stress of 0.08–1.22 GPa in the interface,high interfacial bonding strength of 6.02 MPa,and good fracture toughness of 4.36 MPa·m1/2.Benefited from the optimum components and improved structure,the coating shows excellent cyclic ablation resistance with linear ablation rates of 0.1μm/s at 1650℃for 1500 s(300 s×5 cycles)and 0.4μm/s at 1850℃for 900 s(300 s×3 cycles).The one-step preparation strategy contributes to little damage to the substrate,thus showing the well-preserved mechanical and thermal insulation properties.

关键词： coating carbon fiber reinforced carbon aerogel(C/CA)composites toughness interface residual stress

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Hot Compression Behavior and Tensile Property of a Novel Ni-Co-Based Superalloy Prepared by Electron Beam Smelting Layered Solidification Technology

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Acta Metallurgica Sinica(English Letters) 2024年第2期37卷 283-292页

作者： Yong-Chao Gai Rui Zhang Chuan-Yong Cui Zi-Jian Zhou Yi Tan Yi-Zhou Zhou Xiao-Feng sun Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Shi-changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

The hot compression behavior and tensile strength after compression of a new Ni-Co-based superalloy produced using electron beam smelting layered(EBSL)solidification technology were investigated.Isothermal compression tests were performed at temperatures of 1120℃and 1150℃,with strain rates of 1 s^(-1) and 0.01 s^(-1),reaching a true strain of 0.51.Tensile strength was evaluated at room temperature.The results revealed that this EBSL technology accelerates dynamic recrystallization(DRX),without compromising the strength of alloy.A significant correlation between the volume fraction of DRX and the strain rate was observed,with higher fractions at lower strain rates,leading to higher tensile strength.Additionally,at the same strain rate,the specimens compressed at 1120℃exhibited higher tensile strength due to undissolvedγ′precipitates.After solution and aging heat treatment,the alloy maintained high tensile strength.The results suggested that the EBSL Ni-Co-based superalloy offers excellent prospects for practical applications.

关键词： Ni-Co-based superalloy Hot deformation Electron beam smelting Tensile strength

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一种第三代单晶高温合金的组织稳定性与持久性能

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金属学报 2024年第6期60卷 770-776页

作者：刘金来孙晶霞孟杰李金国中国科学院金属研究所师昌绪先进材料创新中心沈阳110016 中国科学技术大学材料科学与工程学院沈阳110016

针对第三代单晶高温合金研制过程中析出少量拓扑密排相(TCP相)和中温性能偏低的问题,采用电子空位数计算,确定了对合金组织稳定性影响最显著的元素为Al,通过将Al含量降低0.4%,合金在1100℃、1000 h长期时效后完全无TCP相析出,实现了合... 详细信息

针对第三代单晶高温合金研制过程中析出少量拓扑密排相(TCP相)和中温性能偏低的问题,采用电子空位数计算,确定了对合金组织稳定性影响最显著的元素为Al,通过将Al含量降低0.4%,合金在1100℃、1000 h长期时效后完全无TCP相析出,实现了合金良好的组织稳定性。根据中温变形机制,认为合金中温持久性能偏低的原因为合金层错能偏低。确定合金成分的优化方案为在Al含量降低0.4%的基础上,少量降低Re和Co的含量以提高合金的层错能,通过将Re和Co含量分别降低0.25%和1%,合金在760℃、800 MPa的持久寿命由40 h提高到150 h,且合金的高温持久性能保持不变。在此基础上,确定了组织稳定且中/高温性能平衡的一种第三代单晶合金的最佳成分,并讨论了稳定合金组织和提高中温蠕变性能的原因。

关键词：第三代单晶高温合金组织稳定性持久性能 Re 变形机制

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Cross-interaction of volatiles from co-pyrolysis of lignin with pig manure and their effects on properties of the resulting biochar

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Biochar 2021年第3期3卷 391-405页

作者： Chao Li Yifan sun Lijun Zhang changxu Wang Shu Zhang Qiaoling Li Leilei Xu Xun Hu School of Material Science and Engineering University of JinanJinan 250022People’s Republic of China Joint International Research Laboratory of Biomass Energy and Materials Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesCollege of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China Technology Center China Tobacco Fujian Industrial CompanyXiamen 361021FujianPeople’s Republic of China School of Environmental Science and Technology Nanjing University of Information Science and TechnologyNanjing 210000People’s Republic of China

Biomass and pig manure have distinct compositions and the co-pyrolysis of them has gained much attention.However,the influence of volatiles interaction on the properties of the char was still unclear.In this study,lignin was selected as the model component of biomass with pig manure for co-pyrolysis at 600°C.The results indicate that volatiles from co-pyrolysis promoted re-condensation reaction,resulting in the higher char yield(48.0%in co-pyrolysis versus 31.0%in pyrolysis of single manure)and the formation of more aromatics in bio-oil.The co-pyrolysis also facilitated the dehydrogenation and dehydration reactions,which accounted for the elimination of oxygen and nitrogen contents and thus a higher carbon content(64.7%in the co-pyrolysis versus the averaged value of 46.4%from the pyrolysis of single feedstock),higher crystallinity and thermal stability of the char.The in-situ diffuse reflection infrared Fourier transform spectroscopy(DRIFTS)characterization results demonstrated that the functionalities abundances of char with temperature was influenced by volatiles interaction via accelerating the carbonization reaction.In addition,the high heating value(HHV)of char was obviously improved by cross-interaction of volatiles during co-pyrolysis(24.4 MJ/Kg in co-pyrolysis versus averaged value of 15.1 MJ/Kg from single pyrolysis),implying that the co-pyrolysis enhanced the energy density of the resulting char.

关键词： Co-pyrolysis Lignin and pig manure Volatiles interaction Char properties Reaction network

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A nomogram-based immune-serum scoring system predicts overall survival in patients with lung adenocarcinoma

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Cancer Biology & Medicine 2021年第2期18卷 517-529页

作者： Qiujuan Huang Tongyuan Qu Lisha Qi changxu Liu Yuhong Guo Qianru Guo Guangning Li Yalei Wang Wenshuai Zhang Wei Zhao Danyang Ren Leina sun Shengguang Wang Bin Meng Baocun sun Bin Zhang Wenjuan Ma Wenfeng Cao Department of Pathology Tianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin’s Clinical Research Center for CancerTianjin 300060China Department of Pathology Tianjin Academy of Traditional Chinese Medicine Affiliated HospitalTianjin 300120China Department of Lung Cancer Tianjin Lung Cancer Center Department of Breast Cancer Department of Breast Imaging Key Laboratory of Breast Cancer Prevention and TherapyTianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin’s Clinical Research Center for CancerTianjin 300060China

Objective:The immunoscore,which is used to quantify immune infiltrates,has greater relative prognostic value than tumor,node,and metastasis(TNM)stage and might serve as a new system for classification of colorectal cancer.However,a comparable immunoscore for predicting lung adenocarcinoma(LUAD)prognosis is currently lacking.Methods:We analyzed the expression of 18 immune features by immunohistochemistry in 171 specimens.The relationship of immune marker expression and clinicopathologic factors to the overall survival(OS)was analyzed with the Kaplan-Meier method.A nomogram was developed by using the optimal features selected by least absolute shrinkage and selection operator(LASSO)regression in the training cohort(n=111)and evaluated in the validation cohort(n=60).Results:The indicators integrated in the nomogram were TNM stage,neuron-specific enolase,carcino-embryonic antigen,CD8 center of tumor(CT),CD8 invasive margin(IM),Fox P3 CT,and CD45 ROCT.The calibration curve showed prominent agreement between the observed 2-and 5-year OS and that predicted by the nomogram.To simplify the nomogram,we developed a new immune-serum scoring system(I-SSS)based on the points awarded for each factor in the nomogram.Our I-SSS was able to stratify same-stage patients into different risk subgroups.The combination of I-SSS and TNM stage had better prognostic value than the TNM stage alone.Conclusions:Our new I-SSS can accurately and individually predict LUAD prognosis and may be used to supplement prognostication based on the TNM stage.

关键词： Lung adenocarcinoma immune microenvironment nomogram immunoscore prognosis

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