检索结果-南通市图书馆

Data-driven mapping-relationship mining between hardness and mechanical properties of dual-phase titanium alloys via random forest and statistical analysis

引用

Rare Metals 2024年第2期43卷 829-841页

作者： Hai-Chao Gong Qun-Bo Fan Hong-Mei Zhang Xing-Wang Cheng wen-qiang Xie Kai Chen Lin Yang Jun-Jie Zhang Bing-qiang Wei Shun Xu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China National Key Laboratory of Science and Technology on Materials Under Shock and Impact Beijing100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing401135China Department of Mechanical and Materials Engineering University of Nebraska-LincolnLincolnNE68588USA

In order to accelerate the research on the property optimization of titanium alloy based on high-throughput methods,it is necessary to reveal the relationship between hardness and other mechanical properties which is still *** this work,taking Ti20C alloy as research object,almost all the microstructure of dual-phase titanium alloys were covered by traversing over 100 heat treatment ***,massive experiments including microstructure characterization and performance test were conducted,obtaining 51,590 pieces of microstructure data and 3591 pieces of mechanical property ***,based on large-scale data-driven technology,the quantitative mapping relationship between hardness and other mechanical properties was deeply *** results of random forest models showed that the correlation between hardness(H)and Charpy impact energy(A_(k))(or elongation,A)was hardly dependent on the microstructure types,while the relationship between H and tensile strength(R_(m))(or yield strength,R_(p0.2))was highly dependent on microstructure ***,combined with statistical analysis,it was found that the relationship between H and Ak(or A)were negatively ***,the relationship between H and strength was positively linear for equiaxed microstructure,and strength was linked to d^(−1/2)(d,equivalent circle diameter)ofα-grains in the form of classical Hall–Petch formula;but for other microstructures,the relationships were ***,the above rules were nearly the same in the rolling direction and transverse ***,a"four-quadrant partition map"between H and R_(p0.2)/R_(m) was established as a versatile material-screening tool,which can provide guidance for on-demand selection of titanium alloys.

关键词： Dual-phase titanium alloy Data-driven Hardness Mapping relationship

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Microstructure,mechanical and thermal properties of Ni-P(-SiC)coating on high volume fraction SiC_(p)/Al composite

引用

Rare Metals 2023年第2期42卷 705-712页

作者： Gui-Wu Liu wen-qiang Luo Xiang-Zhao Zhang Hai-Cheng Shao Tie-Zheng Pan Guan-Jun Qiao School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China Suzhou Pant Piezoelectric Tech Co.Ltd. Suzhou215300China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an710049China

Ni-P(-SiC)composite coatings were successfully deposited on 70 vol%SiC_(p)/Al composite by electroless *** surface microstructures and the phase structures of the Ni-P(-SiC)coatings were examined and analyzed by scanning electron microscopy(SEM)and X-ray diffraction(XRD)before and after heat-treatment at200-400℃for 2 *** thermal diffusivity of the deposited samples and the interface adhesion between the coating and the substrate were *** experimental results show that SiC content in the coatings increases obviously and XRD peaks are enhanced with SiC content in the bath increasing from 3 to 9 g·L^(-1).After heat-treatment,the surface of the coating becomes smoother and no diffusion layer is produced at the interface.A new phase Ni3P forms in the coating during heat-treatment at 400℃.The critical load(L_(c))of Ni-P-SiC composite coating on SiC_(p)/Al composite reaches the maximum value of 84.9 N with SiC content of 3 g·L^(-1)after heat-treatment at 200℃and more or less decreases with the increase in SiC content and heat-treatment *** thermal diffusivity of deposited samples gradually increases as the temperature increases;however,it reduces firstly and then climbs with the increase in SiC content.

关键词： Ni-P-SiC coating SiC_(p)/Al composite Microstructure Adhesion force Thermal diffusivity

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Trimer formation of 6-methyl-1,3,5-triazine-2,4-diamine in salt with organic and inorganic acids:analysis of supramolecular architecture

引用

Science China Chemistry 2014年第12期57卷 1731-1737,1-2页

作者： XIAO Zhen Yu WANG wen qiang XUE Rui Yu ZHAO Lei WANG Lei ZHANG YiHeng College of Chemistry and Molecular Engineering Qingdao University of Science and Technology

Although the numbers of co-crystals,salts,polymorphs,hydrates,and solvates are growing steadily,trimers that contain both inorganic and organic acids are still very rare in the Cambridge Structural Database(CSD).When 3,5-dihydroxybenzoic acid was crystallized readily with 6-methyl-1,3,5-triazine-2,4-diamine in a 4:3 ratio of ethanol and water by adding a few drops of nitric acid upon slow evaporation in ambient conditions,6-methyl-1,3,5-triazine-2,4-diamine and 3,5-dihydroxybenzoic acid with the nitric acid form of 1:1:1 an inorganic-organic salt formulated as[(C4H8N5+)·(NO3-)·(C7H6O4)].The supramolecular architecture,which is quite elegant and simple,appeared as stacking of a 3D network in *** transfer from the HNO3to 6-methyl-1,3,5-triazine-2,4-diamine N acceptor(triazine N)occurred in the organic salt and led to the ionic heterosynthon in the *** among the–COOH,–OH,NO3–,and–NH–functional groups for the observed hydrogen bond synthon was examined in the *** adduct,recognition among the constituents is established through N–H···O,O–H···N,and O–H···O hydrogen *** agomelatine molecules are linked through the intermolecular hydrogen bonding interactions(O–H···O)to form a 1D *** addition,the nitric acid anions and base cations act as donors and acceptors of hydrogen bonds and interlink,almost to co-planarity,the hydrogen-bonded chains through interchain N–H···O,O–H···N,as well as O–H···O interactions into a 2D sheet *** N–H···O interactions were found to play an important role in the formation of the final 3D *** salt was characterized by elemental analysis,IR,thermogravimetric analysis,and singlecrystal X-ray diffraction,to better understand how intermolecular interactions influence its supramolecular assembly.

关键词： supramolecular hydrogen bonds crystal structure salt

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Aggregation structures of organic conjugated molecules on their optoelectronic properties

引用

Chinese Chemical Letters 2016年第8期27卷 1350-1356,1469页

作者： Jia-Dong Zhou wen-qiang Zhang Lin-Lin Liu Zeng-Qi Xie Yu-Guang Ma Institute of Polymer Optoelectronic Materials & Devices State Key Laboratory of Luminescent Materials & DevicesSouth China University of Technology

The intimate connection between stacking modes and optoelectronic properties of organic conjugated materials has been discussed from the viewpoints of developing microscopic models and further understanding of their functions and potential *** particular,three basal dimer configurations（cofacial configuration,staggered configuration,and crossed configuration） and their respective optical（including radiative and non-radiative） and electrical properties are expatiated in ***,we put forward the perspective on achieving the promising laser material that features high fluorescence quantum yield and charge mobility.

关键词： Fluorescence efficiency Mobility Aggregation Transition dipole

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of Co-addition of DBS and PEG on Wetting Performance of TiO_2 Film

引用

Chemical Research in Chinese Universities 2011年第1期27卷 1-5页

作者： QU Yi-chun JING Li-qiang WANG wen-xin FU Hong-gang LIU Yang Key Laboratory of Functional Inorganic Materials Chemistry Ministry of EducationSchool of Chemistry and Materials Science Heilongjiang University Harbin 150080 P. R. China

Nanocrystalline anatase TiO2 films with indium tin oxide（ITO） coated glass as the film substrate were fabricated through spin-coating technique. The TiO2 pastes were prepared with sodium dodecylbenzenesulfonate（DBS） modified TiO2 nanocrystals, synthesized by sol-hydrotherrnal processes in advance, together with different amounts of polyethylene glycol（PEG） macromolecules. The as-prepared films were mainly characterized by ultraviolet-visible （UV-Vis） spectroscopy, field emission scanning electron microscopy（FE-SEM） and water contact angle（WCA） measurement. Effects of the addition of DBS and PEG on the wetting performance of the resulting films and relevant mechanisms were principally investigated. The results show that the as-prepared film displays super-hydrophilic property after co-addition of DBS and PEG although it is not exposed to ultraviolet light prior to the WCA measure- ment. This appealing result is mainly attributed to the produced micro- and nanometer-scale hierarchical surface structure with uniformly dispersed micro papillae. Each papilla was made up of a great number of TiO2 nanoparticles. The possible formation mechanisms related to the DBS amphiphilic property of the characteristic surface were also suggested. Moreover, the resulting film also exhibits considerable durability in the superhydrophilicity, which is very useful for practical application in self-cleaning, anti-fogging, and bacteria-resistant fields.

关键词： Thin film Chemical synthesis Surface property

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

^(131)I-chTNT-mediated radioimmunotherapy for non-uptaking ^(131)I pulmonary metastases from differentiated thyroid carcinoma

引用

Nuclear Science and Techniques 2013年第6期24卷 56-60页

作者： GAO Shi JI Tiefeng wen qiang CHEN Bin MA Qingjie CHEN Zuowei LIU Lin China-Japan Union Hospital Jilin University Department of Nuclear Medicine People's Hospital of Shenzhen

In this paper,the safety and efficacy of 131I-labeled mouse/human chimeric monoclonal antibody(131I-chTNT)-mediated radioimmunotherapy are evaluated because the patients have non-uptaking 131I pulmonary metastases from differentiated thyroid carcinoma(DTC).The 16 patients were injected intravenously by 29.6±3.7MBq·kg–1 using *** chest computer tomography was performed before treatment,as well as 28 and 70days after *** and safety were assessed during the *** results show that the 131I-chTNT infusion was well tolerated with the 12.5%complete response,18.8%partial response,25.0%progressive disease,and the 43.8%stable disease,indicating that most treatment-related adverse effects are mild transient and ***131I-chTNT is promising for patients with non-uptaking the 131I pulmonary metastases from DTC.

关键词：免疫治疗甲状腺癌吸收分化放射介导肺不良反应

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A new preparation technology of structural- gradient materials without a brittle transition zone in a Mn-Si-Cr-B bainitic cast steel

引用

China Foundry 2018年第4期15卷 283-290页

作者： yu-guang zhao zhe wang xiao-feng xu ming-zhe zhang wen-qiang jiang key laboratory of automobile of ministry of Education ＆school of Materials Science and Engineering Nanling Campusjilin UniversityNO.5988 Renmin streetchangchun 130025china

In the present work, a unique gradient cooling heat treatment process(GCHT) for a Mn-Si-Cr-B bainitic cast steel was developed, and microstructure and mechanical properties were examined by OM, SEM, EBSD and a uniaxial tensile test. The results showed that the structural-gradient-material(SGM) with a gradient microstructure from granular bainite to martensite was successfully produced, and it exhibited a good ductility(~13.8%) at one end and an excellent ultimate strength(~1,720 MPa) at the other end. In between the bainite and martensite, a transition region with a superior combination of tensile strength and ductility(1,700 MPa and 11.1%) was obtained, which is different from the normal knowledge of a brittle transition region. Moreover, through changing the gradient of cooling rate, the optimized SGM with a new gradient microstructure from pearlite to martensite showed a more stable structural gradient and an improved ductility(22.8%) at one end. The microstructure variation in the sample was mainly related to the carbon diffusion rate during heat treatment, and the diffusion rate could be controlled by regulating the cooling velocity. Therefore, the SGMs with different gradient microstructures could be designed to meet the needs of different properties. As a result, this work provides a new approach for preparation of the gradient structured steel, which has potential for practical application for dual-property automobile parts.

关键词： bainitic cast steel gradient cooling heat treatment structural-gradient-materials

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nitrogen-doped pyrogenic carbonaceous matter facilitates azo dye decolorization by sulfide: The important role of graphitic nitrogen

引用

Chinese Chemical Letters 2023年第2期34卷 230-235页

作者： Han-Qing Zhao wen-qiang Li Nannan Hou Lei Li Yiran Wang Peili Lu Yang Mu CAS Key Laboratory of Urban Pollutant Conversion Department of Environmental Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China College of Environment and Ecology Chongqing UniversityChongqing 400044China

Pyrogenic carbonaceous matter(PCM) catalyzes azo dye decolorization by sulfide, but the nitrogen doping catalytic mechanisms are poorly understood. In this study, we found that stagnate time of azo dye methyl orange(MO) decolorization was reduced to 0.54-18.28 min in the presence of various nitrogen-doped graphenes(NGs), remarkably lower compared to graphene itself. Particularly, graphitic nitrogen played a critical role in NGs-catalyzed MO decolorization by sulfide. Gas chromatography-mass spectrometry and in-situ surface Raman analysis demonstrated that doping nitrogen, especially graphite one facilitated reactive intermediate polysulfides formation. This is attributed to the improved electron conductivity through graphitic nitrogen doping, and the enhanced interactions between sulfide and carbon atoms bonded to graphitic nitrogen. This study not only provides a better understanding of PCM impact on transformations and fates of organic pollutants in natural environments, but also offer a new regulation strategy for more efficient wastewater treatment processes in PCM-catalyzed engineering systems.

关键词： Azo dye Decolorization Graphitic N Nitrogen doped graphene Sulfide

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Clinical and neuroimaging features of enterovirus71 related acute flaccid paralysis in patients with hand-foot-mouth disease

引用

Asian Pacific Journal of Tropical Medicine 2013年第1期6卷 68-72页

作者： Feng Chen Jian-Jun Li Tao Liu Guo-qiang wen Wei Xiang Department of Radiology People's Hospital of Hainan Province Department of Neurology People's Hospital of Hainan Province Department of Pediatrics People's Hospital of Hainan Province

Objective:To investigate clinical and neuroimaging features of enterovirus71(EV71) related acute flaccid paralysis in patients with hand-fool-mouth ***:Nine patients with acute flaccid paralysis met the criterion of EV71 induced hand-foot-mouth disease underwent spinal and brain MR imaging from May 2008 to Sep ***:One extremity flaccid was found in four cases(3 with lower limb,1 with upper limb),two limbs flaccid in three cases(2 with lower limbs,1 with upper limbs),and four limbs flaccid in two *** MRI studies showed lesion with high signal in T2-weighted images(T2WI) and low signal T1-weighted images(T1WI) in the spinal cord of all nine cases,and the lesions were mainly in bilateral and unilateral anterior hom of cervical spinal cord and spinal cord below thoracic 9(T9) *** addition,the midbrain,pons, and medulla,which were involved in 3 cases with brainstem encephalitis,demonstrated abnormal ***,spinal cord contrast MRI studies showed mild enhancement in corresponding anterior hom of the involved side,and strong enhancement in its ventral ***: EV71 related acute flaccid paralysis in patients with hand-foot-mouth disease mainly affected the anterior hom regions and ventral root of cervical spinal cord and spinal cord below T9 level. MR imaging could efficiendy show the characteristic pattern and extent of the lesions which correlated well with the clinical features.

关键词： Enterovirus infection Hand-foot-mouth disease Acute flaccid paralysis Magnetic resonance imaging

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Multidimensional hollow SiO_(2)/C nanofibers modified by magnetic nanocrystals for electromagnetic energy conversion and lithium battery storage

引用

Nano Research 2024年第8期17卷 7301-7314页

作者： Chen Han Qi Zheng Juncheng Jin Jiajia Zhang wen-qiang Cao Kun Xiang Min Zhang Mao-Sheng Cao Anhui Provincial Laboratory of Biomimetic Sensor and Detecting Technology College of Materials and Chemical EngineeringWest Anhui UniversityLu’an 237012China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Department of Physics Beijing Technology and Business UniversityBeijing 100048China

Multifunctional materials are powerful tools to support the advancement of energy conversion *** with prominent electromagnetic and electrochemical properties can realize the conversion of electromagnetic energy and solve the subsequent storage ***,an electrospinning-thermal reduction method is employed to construct ultrafine nickel nanoparticle modified porous SiO_(2)/C(Ni-SiO_(2)/C)hollow nanofibers as promising materials for applications in both electromagnetic wave absorption(EMA)and lithium-ion ***,when used as an EMA material,the reflection loss(RL)of Ni-SiO_(2)/C can reach−47.8 dB at 15.8 GHz with a matching thickness of 2.2 *** excellent microwave absorption performance can be attributed to the enhanced conduction loss,polarization relaxation,synergistic magnetic loss,and preferred impedance matching,which result from multi-component magnetic/dielectric synergy and the unique interconnected multidimensional hollow ***,the electronic conductivity and electrochemical activity of the samples are significantly enhanced due to the uniform distribution of ultrafine Ni nanoparticles in the amorphous SiO_(2)/C ***,the hierarchical hollow porous structure provides sufficient free space for volume change during lithiation/delithiation ***,the Ni-SiO_(2)/C nanocomposite exhibits a high reversible capacity of 917.6 mAh·g^(−1)at 0.1 A·g^(−1).At a high current density of 2 A·g^(−1),a capacity of 563.9 mAh·g^(−1)can be maintained after 300 *** energy conversion-storage device is designed to store waste electromagnetic energy in the form of useful electrical *** work inspires the development of high-performance bifunctional materials.

关键词： Ni-SiO_(2)/C nanofiber electromagnetic absorption lithium-ion storage electrospinning multidimensional structure

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：