Science and Technology of Materials最新文献_第3页

Advanced liquid state processing techniques for ex-situ discontinuous particle reinforced nanocomposites: A review 非原位非连续颗粒增强纳米复合材料的先进液相处理技术综述

Science and Technology of Materials Pub Date : 2018-05-01 DOI: 10.1016/j.stmat.2018.05.005

C. Kannan, R. Ramanujam

{"title":"Advanced liquid state processing techniques for ex-situ discontinuous particle reinforced nanocomposites: A review","authors":"C. Kannan, R. Ramanujam","doi":"10.1016/j.stmat.2018.05.005","DOIUrl":"10.1016/j.stmat.2018.05.005","url":null,"abstract":"<div>Recent times, metal matrix composites (MMC) are considered as candidate materials for numerous applications such as aerospace, automotive and military industries due to improved properties over the conventional metals and alloys. Out of the different categories of metal matrix composites, discontinuous particulate reinforced composites are preferred for industrial applications due to low manufacturing cost. High fracture toughness, improved ductility and machinability characteristics support the selection of metal matrix nanocomposites (MMnC) over conventional composites for different applications. The majority of nanocomposites are produced through liquid state processing due to faster processing time and economy. However, the conventional liquid processing method leads to poor wetting of reinforced nanoparticles by molten metal that degrades the quality of the fabricated nanocomposite. This paper reviews some of the advanced liquid state processing techniques adopted for the improved wettable characteristics of nanoparticles and their uniform distribution in the metal matrix.</div>","PeriodicalId":101145,"journal":{"name":"Science and Technology of Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.stmat.2018.05.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83490446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Tensile behavior of aluminum alloy (AA7050) metal matrix composite reinforced with graphene fabricated by stir and squeeze cast processes 搅拌和挤压铸造法制备石墨烯增强铝合金(AA7050)金属基复合材料的拉伸性能

Science and Technology of Materials Pub Date : 2018-05-01 DOI: 10.1016/j.stmat.2018.02.005

S. Venkatesan, M. Anthony Xavior

{"title":"Tensile behavior of aluminum alloy (AA7050) metal matrix composite reinforced with graphene fabricated by stir and squeeze cast processes","authors":"S. Venkatesan, M. Anthony Xavior","doi":"10.1016/j.stmat.2018.02.005","DOIUrl":"10.1016/j.stmat.2018.02.005","url":null,"abstract":"<div>Metal matrix composites based on aluminum alloy AA7050 reinforced with graphene nanoparticles are fabricated using stir casting and squeeze casting techniques. Mechanical characteristics studies were performed on both the stir cast and squeeze cast composite specimen. Taguchi's L27 orthogonal array was used for the design of experiments. Certain parameters like melting temperature (775, 800 and 825   wt%) with three levels were considered for the experiments. Based on the experimental results, analysis of variance (ANOVA) was conducted to determine the level of influence of the parameters on the tensile strength of the specimens. The microstructural result shows that graphene particles are uniformly distributed in the aluminum matrix only in the composites with 0.3 wt % graphene irrespective of the process followed for the fabrication of composite samples. It is being found that the tensile properties of both stir cast and squeeze cast samples have been enhanced for 0.3  <!-->wt% results in cluster formation.</div>","PeriodicalId":101145,"journal":{"name":"Science and Technology of Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.stmat.2018.02.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78304669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 58

Physical and mechanical characterization of surface treated bamboo fibers 表面处理竹纤维的物理力学特性

Science and Technology of Materials Pub Date : 2018-05-01 DOI: 10.1016/j.stmat.2018.03.002

R.F. Buson , L.F.L. Melo , M.N. Oliveira , G.A.V.P. Rangel , E.P. Deus

{"title":"Physical and mechanical characterization of surface treated bamboo fibers","authors":"R.F. Buson , L.F.L. Melo , M.N. Oliveira , G.A.V.P. Rangel , E.P. Deus","doi":"10.1016/j.stmat.2018.03.002","DOIUrl":"10.1016/j.stmat.2018.03.002","url":null,"abstract":"<div>The bamboo fiber has been studied as composite reinforcement for offering lightness and more resistance to the material. Alkalization and acetylation are superficial chemical treatments based on alkaline solution and on a solution based in acid and acetic anhydride, respectively, which modify the fibers composition, introducing functional groups acetyl, turning it hydrophobic. In this project, it was aimed the application of the alkalinization and acetylation treatments, attempting to improve the fibers adhesion to the polymers when in a composite. The fibers were evaluated by moisture content, water absorption tests by immersion, density, infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, tensile tests, and morphological analysis. When acetylated, the bamboo fiber presented lower water absorption (62.98%), gained thermal stability of approximately 50 °C, presented lower crystallinity (62.47%) and, according to SEM images, the fibers has shown an increase of surface roughness, facts that contribute to the best fiber/matrix adhesion in composites. The acetylation decreased the mechanical strength of the fiber, supporting 19,820   <!-->MPa from the alkaline.</div>","PeriodicalId":101145,"journal":{"name":"Science and Technology of Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.stmat.2018.03.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88606398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 29

A review on the mechanical properties of areca fiber reinforced composites 槟榔纤维增强复合材料力学性能研究进展

Science and Technology of Materials Pub Date : 2018-05-01 DOI: 10.1016/j.stmat.2018.05.004

R.B. Ashok , C.V. Srinivasa , B. Basavaraju

引用次数: 32

Synthesis of highly crystalline phase pure calcium metastannate by molten salt method 熔盐法合成高结晶相纯亚metastate钙

Science and Technology of Materials Pub Date : 2018-05-01 DOI: 10.1016/j.stmat.2018.04.002

I.A. Disher Al-Hydary, S.J. Edress Al-Mohana, M.M. Hussein Al-Marzooqee

{"title":"Synthesis of highly crystalline phase pure calcium metastannate by molten salt method","authors":"I.A. Disher Al-Hydary, S.J. Edress Al-Mohana, M.M. Hussein Al-Marzooqee","doi":"10.1016/j.stmat.2018.04.002","DOIUrl":"10.1016/j.stmat.2018.04.002","url":null,"abstract":"<div>Calcium metastannate CaSnO3 with orthorhombic crystal system has been synthesized at low temperature by molten salt method using KCl-LiCl as a reaction medium and equimolar of SnO2 and CaCO3 as precursors. The process parameters including the reaction temperature, salt type, and salt to precursor weight ratio were investigated. Rietveld refinements on X-ray powder diffraction patterns were performed using X'Pert HighScore Plus software to calculate phase percent of each phase present in the obtained powder. The results of these calculations were followed in order to choose the salt system that requires the least reaction temperature to produce the highest CaSnO3 percent. The as-prepared compound was characterized by various techniques such as X-Ray diffraction (XRD), energy dispersive X-Ray spectrometry (EDX), Fourier transform infrared spectrometry (FTIR), and field emission scanning electron microscope (FE-SEM). The experimental results showed that highly crystalline phase pure CaSnO3 laminar plates could be prepared at 1000 °C for short period of time without any other detectable secondary phases.</div>","PeriodicalId":101145,"journal":{"name":"Science and Technology of Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.stmat.2018.04.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82617655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of cooling medium on microstructure evolution and tensile properties of creep-strength-enhanced ferritic steel 冷却介质对蠕变强度增强铁素体钢组织演变及拉伸性能的影响

Science and Technology of Materials Pub Date : 2018-05-01 DOI: 10.1016/j.stmat.2018.01.005

C. Pandey , N. Saini , J.G. Thakre , M.M. Mahapatra , P. Kumar

引用次数: 2

Development of SLM cellular structures for injection molds manufacturing 用于注射模具制造的SLM细胞结构的发展

Science and Technology of Materials Pub Date : 2018-01-01 DOI: 10.1016/j.stmat.2018.03.001

C. Malca , C. Santos , M. Sena , A. Mateus

{"title":"Development of SLM cellular structures for injection molds manufacturing","authors":"C. Malca , C. Santos , M. Sena , A. Mateus","doi":"10.1016/j.stmat.2018.03.001","DOIUrl":"10.1016/j.stmat.2018.03.001","url":null,"abstract":"<div>Using selective laser melting (SLM) is possible to manufacture molds with cellular internal structures with different porosity degree. Furthermore, internal geometry design can be improved as a function of the desired structural and thermal stress solicitations. In this work two types of cellular internal structures – hexagonal and cub-octahedral – were developed and manufactured using the SLM process. These topologies were generated with the purpose of creating a high degree of internal porosity and getting satisfactory results in terms of thermal and mechanical behavior when compared with similar dimensional bulk structures. The mechanical and thermal behaviors of each cellular topology were evaluated numerically and experimentally through compression and thermal tests. From numeric and experimental results, it can be concluded that hexagonal cellular internal topology provides a higher mechanical strength when compared to the cub-octahedral cellular structure while the thermal analysis shows that cub-octahedral topology is more efficient for heat dissipation. Both cellular topologies have demonstrated, however, to be appropriate for use in injection mold structures. In addition, the use of these cellular topologies provides light weight structuring with an approximate 58% weight reduction, which represents a considerable saving of material total cost to manufacturing of an injection mold.</div>","PeriodicalId":101145,"journal":{"name":"Science and Technology of Materials","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.stmat.2018.03.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81211494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Modelling and effective properties prediction of metal foams 金属泡沫的建模与有效性能预测

Science and Technology of Materials Pub Date : 2018-01-01 DOI: 10.1016/j.stmat.2018.01.004

José Aquino, Isabel Duarte, João Dias-de-Oliveira

引用次数: 6

A multiscale homogenization procedure using the fabric tensor concept 使用织物张量概念的多尺度均匀化过程

Science and Technology of Materials Pub Date : 2018-01-01 DOI: 10.1016/j.stmat.2018.01.002

M. Marques , J. Belinha , A.F. Oliveira , M.C. Manzanares Céspedes , R.N. Jorge

引用次数: 2

Special Issue on Cellular Materials 细胞材料特刊

Science and Technology of Materials Pub Date : 2018-01-01 DOI: 10.1016/j.stmat.2018.05.001

I. Duarte , N. Peixinho , A. Andrade-Campos , R. Valente

引用次数: 17