检索结果-南通市图书馆

选区激光熔化扫描间距对AlSi10Mg合金致密度的影响

在线全文

学校读者我要写书评

暂无评论

热加工工艺 2024年第3期53卷 14-18页

作者：申川章桥新余金桂刘蓉武汉理工大学机电学院湖北武汉430000 哈尔滨工业大学先进焊接与连接国家重点研究室黑龙江哈尔滨150001

在确保熔池的稳定性基础上,采用AlSi10Mg合金单道选区激光熔化(SLM)试验确定了激光功率和扫描速度的合理范围,分别为150~180 W,600~1200 mm/s。选择180 W、800 mm/s,以及170 W、600 mm/s两组参数进行多道多层SLM试验,研究扫描间距(0.05~... 详细信息

在确保熔池的稳定性基础上,采用AlSi10Mg合金单道选区激光熔化(SLM)试验确定了激光功率和扫描速度的合理范围,分别为150~180 W,600~1200 mm/s。选择180 W、800 mm/s,以及170 W、600 mm/s两组参数进行多道多层SLM试验,研究扫描间距(0.05~0.16 mm)对合金致密度的影响,以及扫描间距和拉伸方向对拉伸力学性能的影响。结果表明:致密度随着扫描间距的增加呈现先增加后减小的趋势。过小的扫描间距会产生球化颗粒,恶化致密度;而扫描间距过大时,熔池的搭接区下方会有未熔化粉末,降低了致密度。当拉伸方向和扫描方向垂直时,合金的抗拉强度和伸长率随着扫描间距的减小而略微增加,而且合金的拉伸性能明显好于拉伸方向和扫描方向平行时的。

关键词：选区激光熔化扫描间距致密度

新型CIIR/NR共混橡胶减振器的三向减振特性

在线全文

学校读者我要写书评

暂无评论

兵器材料科学与工程 2024年第3期47卷 90-96页

作者：李昊徽章桥新孙泽睿余金桂武汉理工大学机电工程学院湖北武汉430070

为探究共混橡胶的减振效果,制备一种基于氯化丁基橡胶(CIIR)和天然橡胶(NR)共混的新型橡胶减振器,通过简谐振动与随机振动试验,研究其在0~5kHz范围内的减振特性。结果表明:增大扭矩可增加共振频率,减小振幅、传递率。中低频和中高频的... 详细信息

为探究共混橡胶的减振效果,制备一种基于氯化丁基橡胶(CIIR)和天然橡胶(NR)共混的新型橡胶减振器,通过简谐振动与随机振动试验,研究其在0~5kHz范围内的减振特性。结果表明:增大扭矩可增加共振频率,减小振幅、传递率。中低频和中高频的减振效果良好,传递率最小在10^(-6)数量级。

关键词： CIIR/NR共混橡胶减振器简谐振动随机振动传递率

同方期刊数据库

C_(5)石油树脂用量对天然橡胶胶料性能的影响

在线全文

学校读者我要写书评

暂无评论

橡胶工业 2024年第7期71卷 523-528页

作者：陆展康章桥新余金桂周瑞平武汉理工大学机电工程学院湖北武汉430070 武汉理工大学能源与动力工程学院湖北武汉430070

研究C_(5)石油树脂用量对天然橡胶(NR)胶料性能的影响。结果表明:随着C_(5)石油树脂用量的增大,NR胶料的邵尔A型硬度、定伸应力、拉伸强度、拉断伸长率和交联密度减小,但加入40份C_(5)石油树脂的NR胶料的拉断伸长率仍达654%,表明其弹性... 详细信息

研究C_(5)石油树脂用量对天然橡胶(NR)胶料性能的影响。结果表明:随着C_(5)石油树脂用量的增大,NR胶料的邵尔A型硬度、定伸应力、拉伸强度、拉断伸长率和交联密度减小,但加入40份C_(5)石油树脂的NR胶料的拉断伸长率仍达654%,表明其弹性仍较好;加入C_(5)石油树脂的NR胶料的损耗因子(tanδ)-温度曲线仅出现单个损耗峰,即C_(5)石油树脂与NR的相容性好;随着C_(5)石油树脂用量的增大,NR胶料的tanδ峰值减小,玻璃化温度向高温方向移动,有效阻尼温域拓宽,阻尼性能明显提升;未加入C_(5)石油树脂的NR胶料的断面较为粗糙,加入C_(5)石油树脂的NR胶料的断面较平滑。

关键词：天然橡胶 C_(5)石油树脂物理性能阻尼性能

树脂黏度对碳纤维与环氧树脂浸润性及界面结合性能的影响

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

化工新型材料 2024年第6期52卷 149-154页

作者：韩亚磊章桥新高列义赵飞李资聪郑磊武汉理工大学材料科学与工程学院武汉430070 湖北航天技术研究院总体设计所武汉430048

碳纤维与环氧树脂基体形成良好的界面结合是发挥复合材料基本性能的保障,考察3种国产T700级碳纤维,研究树脂黏度对碳纤维浸润性以及界面结合性能的影响。结果表明:由室温升到60℃,树脂体系黏度从1401.9mPa·s降低到102.77mPa·s,碳纤维... 详细信息

碳纤维与环氧树脂基体形成良好的界面结合是发挥复合材料基本性能的保障,考察3种国产T700级碳纤维,研究树脂黏度对碳纤维浸润性以及界面结合性能的影响。结果表明:由室温升到60℃,树脂体系黏度从1401.9mPa·s降低到102.77mPa·s,碳纤维与树脂的接触角减小,浸润能力增强,从而提高复合材料的界面结合强度,在60℃下制备的复合材料层间剪切强度提高了17.44%。同时纤维表面的沟槽结构能够加强物理机械互锁作用,加强复合材料的界面结合强度。

关键词：碳纤维复合材料黏度浸润性界面结合性能层间剪切强度

同方期刊数据库

Microstructures and electrochemical behaviors of casting magnesium alloys with enhanced compression strengths and decomposition rates

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2023年第4期11卷 1213-1223页

作者： Xuewu Li Qingyuan Yu Xi Chen qiaoxin zhang State Key Laboratory of Tribology Tsinghua UniversityBeijing 100084China School of Mechanical Engineering Xi’an University of Science and Technology58 Yanta RoadXi’an 710054China School of Mechanical and Electronic Engineering Wuhan University of Technology122 Luoshi RoadWuhan 430070China

New-type magnesium alloy with prominent solubility and mechanical property lays foundation for preparing fracturing part in petroleum ***,Mg-xZn-Zr-SiC alloy is prepared with casting *** and compression tests are conducted to assess the feasibility as decomposable ***,composition,phase and distribution are characterized to investigate decomposition *** indicate that floccule,substrate component and reticulate secondary phase are formed on as-prepared *** also acts out enhanced compression strength to maintain pressure and guarantee stability in dissolution ***,as decomposition time and zinc content increase,couple corrosion intensifies,resulting in gradually enhanced decomposition *** sample decomposition is mainly due to basal anode dissolution,micro particle exfoliation and poor decomposition resistance of corroding *** work shows profound significance in preparing new-type accessible alloy to ensure rapid dissolution of fracturing part and guarantee stable compression strength in oil-gas reservoir exploitation.

关键词： Magnesium alloy Corrosion dissolution Compression strength Electrochemical test Decomposition mechanism

Polydopamine/polyethyleneimine co-crosslinked graphene oxide for the enhanced tribological performance of epoxy resin coatings

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第5期136卷 13-20页

作者： Shaofeng Zhou Jin Yan Jialin Chen Huimin Yan Yin zhang Jin Huang Guizhe Zhao qiaoxin zhang Yaqing Liu Shanxi Province Key Laboratory of Functional Nanocomposites and School of Materials Science and EngineeringNorth University of ChinaTaiyuan 030051China School of Mechanical and Electronic Engineering Wuhan University of TechnologyWuhan 430070China Queen Marry University of London Engineering School Northwestern Polytechnical UniversityXi’an 710129China Southwest Technology and Engineering Research Institute Chongqing 400039China School of Chemistry and Chemical Engineering and Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function ManufacturingSouthwest UniversityChongqing 400715China

To enhance the wear resistance of graphene oxide(GO)nano-filled epoxy resin(EP)coatings with ex-cellent dispersion,GO were modified using a co-crosslinking strategy between polydopamine(PDA)and polyethyleneimine(PEI)through an environmentally friendly,simple and low-cost ***-density amino-branched PEI and highly adhesive PDA formed covalent bond cross-links with GO(PDA/PEI-GO)through the Michael addition and Schiffbase *** the introduction of amino active sites,the PDA self-polymerization reaction time was significantly shorted from 24 to 6 *** covalently cross-linked network increased the lamellar spacing of GO and enhanced the interfacial bonds between the PDA/PEI-GO lamellae and EP *** to the improved dispersion and surface activity of GO,the PDA/PEI-GO nano-filled EP coating exhibited excellent wear *** friction with GCr15 stainless steel ball,the average friction coefficient and wear rate of the coating were reduced by 31.9%and 62.7%,respectively,compared to the pure EP *** addition,the wear mechanism of the PDA/PEI-GO/EP coating changed from adhesive and fatigue wear to abrasive wear,and it maintained good wear resistance by forming a GO lubrication transfer film on the counterpart ***,this study may provide a new strategy for improving the dispersion of graphene in wear-resistant polymer materials for practical applications.

关键词： Graphene oxide Co-crosslinking Epoxy coatings Tribological properties

Simple Fabrication of Hierarchical Micro/Nanostructure Superhydrophobic Surface with Stable and Superior Anticorrosion Silicon Steel via Laser Marking Treatment

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

Journal of Wuhan University of Technology(Materials Science) 2020年第2期35卷 411-417页

作者： FU Jing TANG Mingkai zhang qiaoxin School of Mechanical and Electronic Engineering Henan Institute of TechnologyXinxiang 453003China School of Mechanical and Electronic Engineering Wuhan University of TechnologyWuhan 430070China

To improve the weak corrosion resistance of silicon steel to acid solution and alkaline solution with high temperature,a stable hierarchical micro/nanostructure superhydrophobic surface with myriad irregular micro-scale hump and sheet-like nanostructure was successfully prepared on silicon steel by a simple,efficient and facile operation in large-area laser marking *** morphology,composition,wettability of the as-prepared surface were *** superhydrophobic performance of the surface was investigated as ***,the corrosion resistance of the superhydrophobic surface to acidic solutions at room temperature and alkaline solutions at high temperature (80 ℃) was carefully *** corrosion resistance mechanism was ***,considering the practical application of the surface in the future,the hardness of the hierarchical micro/nanostructure superhydrophobic surface was *** experimental results indicate that the hierarchical micro/nanostructure surface with texture spacing of 100 μm treated at laser scanning speed of 100 mms/ presents superior superhydrophobicity after decreasing surface *** contact angle can be as high as 156.6°.Additionally,the superhydrophobic surface provide superior and stable anticorrosive protection for silicon steel in various corrosive *** importantly,the prepared structure of the surface shows high hardness,which ensures that the surface of the superhydrophobic surface cannot be destroyed *** surface is able to maintain great superhydrophobic performance when it suffers from slight impacting and abrasion.

关键词： silicon steel laser marking hierarchical micro/nanostructure superhydrophobic surface corrosion resistance

Microstructure and of Mechanics Microwave Boriding

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2008年第4期23卷 528-531页

作者： YE Weiping HUANG Zilin zhang qiaoxin zhang Qinyi School of Materials ScienceandEngineering Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Microwave boriding layer microstructure of carbon steels and its diffusion mechanics were studied. The results show that the existence of microwave field in the boriding can＇t change the growth mechanics of boriding layer. Compared with conventional boriding, if the treatment temperature and time remain constantly, the descend rate of the boriding layer thickness with the increase of carbon content of steel is smaller. The diffusion activation energy ofT8 steel is 2.6× 10^5 J/mol between the temperature of 750 ℃ and 900 ℃ in microwave field, which is in the same order of conventional boriding.

关键词： microwave boriding boriding layer diffusion activation energy

MICROWAVE JOINING OF ALUMINA CERAMIC AND HYDROXYLAPATITE BIOCERAMIC

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 1999年第2期14卷 46-49页

作者： Zhou, Jian zhang, qiaoxin Mei, Bingchu Yan, Yuhua Wuhan Univ Technol State Key Lab Adv Technol Mat Synth & Proc Wuhan 430070 Peoples R China

Microwave joining is a rapid developmental new technique in recent years. This paper introduces a new microwave joining equipment which was made by our lab, succeeds in alumina ceramic - hydroxylapatite bioceramic join in the equipment, and analyzes the join situation of join boundary by using scanning electron microscope (SEM), this paper analyzes the mechanism of microwave joining also. (Author abstract) 4 Refs.

关键词： Al2O3 ceramic hydroxylapatite bioceramic microwave joining