检索结果-南通市图书馆

Enhanced tribological properties of aligned graphene-epoxy composites

Friction 2022年第6期10卷 854-865页

作者： Yuefeng DU Zhenyu ZHANG Dong WANG Lezhen ZHANG Junfeng CUI Yapeng CHEN Mingliang WU Ruiyang KANG Yunxiang LU Jinhong YU Nan JIANG Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education Dalian University of TechnologyDalian 116024China Beijing Spacecrafts Manufacturing Factory Co. Ltd.China Academy of Space TechnologyBeijing 100094China Weichai Power Co. Ltd.Weifang 261061China Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and Engineering(NIMTE)Chinese Academy of SciencesNingbo 315201China

The random distribution of graphene in epoxy matrix hinders the further applications of grapheneepoxy composites in the field of tribology.Hence,in order to fully utilize the anisotropic properties of graphene,highly aligned graphene-epoxy composites(AGEC)with horizontally oriented structure have been fabricated via an improved vacuum filtration freeze-drying method.The frictional tests results indicated that the wear rate of AGEC slowly increased from 5.19x10^(-6)mm^(3)/(N-m)to 2.87x10^(-5)mm^(3)/(N-m)with the increasing of the normal load from 2 to 10 N,whereas the friction coefficient(COF)remained a constant of 0.109.Compared to the neat epoxy and random graphene-epoxy composites(RGEC),the COF of AGEC was reduced by 87.5%and 71.2%,and the reduction of wear rate was 86.6%and 85.4%at most,respectively.Scanning electron microscope(SEM)observations illustrated that a compact graphene self-lubricant film was formed on the worn surface of AGEC,which enables AGEC to possess excellent tribological performance.Finally,in light of the excellent tribological properties of AGEC,this study highlights a pathway to expand the tribological applications of graphene-epoxy composites.

关键词： graphene aligned epoxy composite tribological performance

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

Experimental investigation and prediction of tribological behavior of unidirectional short castor oil fiber reinforced epoxy composites

引用

Friction 2021年第2期9卷 250-272页

作者： Rajesh EGALA G V JAGADEESH Srinivasu Gangi SETTI Department of Mechanical Engineering National Institute of Technology RaipurChhattisgarh 492010India Department of Mechanical Engineering Gudlavalleru Engineering CollegeGudlavalleruAndhra Pradesh 521356India

The present study aims at introducing a newly developed natural fiber called castor oil fiber,termed ricinus communis,as a possible reinforcement in tribo-composites.Unidirectional short castor oil fiber reinforced epoxy resin composites of different fiber lengths with 40%volume fraction were fabricated using hand layup technique.Dry sliding wear tests were performed on a pin-on-disc tribometer based on full factorial design of experiments(DoE)at four fiber lengths(5,10,15,and 20 mm),three normal loads(15,30,and 45 N),and three sliding distances(1,000,2,000,and 3,000 m).The effect of individual parameters on the amount of wear,interfacial temperature,and coefficient of friction was studied using analysis of variance(ANOVA).The composite with 5 mm fiber length provided the best tribological properties than 10,15,and 20 mm fiber length composites.The worn surfaces were analyzed under scanning electron microscope.Also,the tribological behavior of the composites was predicted using regression,artificial neural network(ANN)-single hidden layer,and ANN-multi hidden layer models.The confirmatory test results show the reliability of predicted models.ANN with multi hidden layers are found to predict the tribological performance accurately and then followed by ANN with single hidden layer and regression model.

关键词： natural fiber castor oil fiber epoxy composite full factorial design of experiments(DoE) analysis of variance(ANOVA) prediction regression artificial neural network(ANN)

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

Value-Added Utilization of Agro-Waste Derived Oil Palm Ash in epoxy composites

引用

Journal of Renewable Materials 2019年第12期7卷 1269-1278页

作者： Samsul Rizal Fizree.H.M Chaturbhuj K.Saurabh Deepu A.Gopakumar N.A.Sri Aprilia D.Hermawan A.Banerjee Fazita M.R.M Haafiz M.K.M Abdul Khalil H.P.S Department of Mechanical Engineering Universitas Syiah KualaBanda AcehIndonesia School of Industrial Technology Universiti Sains MalaysiaPenangMalaysia Food Technology Division Bhabha Atomic Research CentreTrombayMumbaiIndia Department of Chemical Engineering Universitas Syiah KualaBanda AcehIndonesia Department of Forestry Kampus IPBDarmagaBogor Agricultural UniversityBogorWest JavaIndonesia Department of Biotechnology and Microbiology Tilak College of Science and CommerceUniversity of MumbaiMumbaiIndia.

Oil palm ash(OPA)is an agro-industry waste and it has disposable problems.In the present study,an effort was made for value addition to OPA by incorporating it as a micro-filler in different concentration(0,10,20,30,40,and 50%)and sizes(100,200,and 300 mesh size particles)in the epoxy matrix.Prepared micro OPA was having a crystallinity index of 65.4%,high inorganic elements,and smooth surface morphology.Fabricated composites had higher void content as compared to neat epoxy matrix.Mechanical properties of fabricated composites had a maximum value at 30%loading of 300 mesh-size filler due to its low void content and size as compared to filler of 100 and 200 mesh size.Further increase in the concentration of OPA filler after 30 wt%of loading leads to the agglomeration of OPA microparticles and thereby resulted in the reduction of mechanical characteristics such as tensile strength,tensile modulus,flexural strength and flexural modulus of the composites.However,elongation at break decreased with increase in filler content at all percentage.Thermal stability and char residue percentage of composite increased with the concentration of filler at all percentage.Surface morphology of composite showed that OPA incorporation lead towards its roughness and cracks were originated from the site of OPA embedded in the epoxy matrix.The 300 mesh-size particles were having the best effect on composite as compared to 100 and 200 mesh-size filler.

关键词： Oil palm ash micro filler epoxy composite

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

Tribological properties of short carbon fibers reinforced epoxy composites

引用

Friction 2014年第3期2卷 226-239页

作者： Nay Win KHUN He ZHANG Lee Hoon LIM Chee Yoon YUE Xiao HU Jinglei YANG School of Mechanical and Aerospace Engineering 2School of Materials Science and EngineeringNanyang Technological University50 Nanyang AvenueSingapore 639798Singapore

Short carbon fiber(SCF)reinforced epoxy composites with different SCF contents were developed to investigate their tribological properties.The friction coefficient and wear of the epoxy composites slid in a circular path against a steel pin inclined at 45°to a vertical axis and a steel ball significantly decreased with increased SCF content due to the solid lubricating effect of SCFs along with the improved mechanical strength of the composites.The scanning electron microscope(SEM)observation showed that the epoxy composites had less sensitive to surface fatigue caused by the repeated sliding of the counterparts than the epoxy.The tribological results clearly showed that the incorporation of SCFs was an effective way to improve the tribological properties of the epoxy composites.

关键词： epoxy composite short carbon fiber friction wear

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

Mechanical and tribological properties of epoxy matrix composites modified with microencapsulated mixture of wax lubricant and multi-walled carbon nanotubes

引用

Friction 2013年第4期1卷 341-349页

作者： Nay Win KHUN He ZHANG Jinglei YANG Erjia LIU School of Mechanical and Aerospace Engineering Nanyang Technological University50 Nanyang AvenueSingapore 639798Singapore

The mechanical and tribological properties of epoxy composites modified with microencapsulated wax lubricant and multi-walled carbon nanotubes(MWCNTs)were investigated.The increased soft microcapsules embedded in the epoxy matrices were responsible for the reduced micro-hardness and Young’s modulus of the epoxy composites.It was found that the friction of the epoxy composites greatly decreased with increased microcapsule content due to combined lubricating effects of the both wax lubricant and MWCNTs.As a result,the wear of the epoxy composites apparently decreased with increased microcapsule content.

关键词： epoxy composite microcapsule wax lubricant MWCNT tribology

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

Super-low friction of ta-C coating in presence of oleic acid

引用

Friction 2014年第2期2卷 156-163页

作者： Makoto KANO Jean Michel MARTIN Kentaro YOSHIDA Maria Isabel DE BARROS BOUCHET Division of Mechanical&Material Engineering Kanagawa Industrial Technology Center705-1 Shimo-ImaizumiEbinaKanagawaJapan LTDS Ecole Centrale de Lyon 69380EcullyFrance

Friction tests have been carried out on bearing steel friction pairs coated with a-C:H and ta-C under lubricated conditions with 1-hexadecene and pure oleic acid,respectively.Main results show that ta-C leads to the super-low regime with oleic acid(friction coefficient below 0.01)and that a-C:H is quite well lubricated by 1-hexadecen.Surface analyses by coupling X-ray photoelectron spectroscopy(XPS)and secondary ion mass spectrometry(SIMS)have been carried out in the case of oleic acid with ta-C and a-C:H coatings.Results show that tribochemical reactions have occurred.OH groups terminate the ta-C surface whereas a-C:H is covered by a thin tribofilm and is terminated by oleic acid monolayers.The superlow regime in the case of ta-C is mainly attributed to the presence of the OH-termination.

关键词： epoxy composite short carbon fiber friction wear

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

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

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：