Advances in Materials Science最新文献_第10页

Influence of Stick Electrode Coating’s Moisture Content on the Diffusible Hydrogen in Underwater Wet Shielded Metal Arc Welding 焊条涂层含水率对水下湿式保护金属电弧焊中可扩散氢的影响

IF 1.3

Advances in Materials Science Pub Date : 2020-12-01 DOI: 10.2478/adms-2020-0020

J. Klett, T. Hassel

引用次数: 10

Formulation of Clay Refractory Bricks: Influence of the Nature of Chamotte and the Alumina Content in the Clay 粘土耐火砖的配方:粘土性质和粘土中氧化铝含量的影响

IF 1.3

Advances in Materials Science Pub Date : 2020-11-24 DOI: 10.11648/J.AM.20200904.11

Moustapha Sawadogo, M. Seynou, L. Zerbo, B. Sorgho, G. Lecomte‐Nana, P. Blanchart, R. Ouedraogo

{"title":"Formulation of Clay Refractory Bricks: Influence of the Nature of Chamotte and the Alumina Content in the Clay","authors":"Moustapha Sawadogo, M. Seynou, L. Zerbo, B. Sorgho, G. Lecomte‐Nana, P. Blanchart, R. Ouedraogo","doi":"10.11648/J.AM.20200904.11","DOIUrl":"https://doi.org/10.11648/J.AM.20200904.11","url":null,"abstract":"Refractory materials from kaolinitic clays and clay chamotte or quartz were studied to increase the refractoriness under load at temperature above 1300°C. Two different clays mined in Burkina Faso were used and chamotte grains were obtained by preliminary firing a local clay. Fired materials at 1350-1400°C present a typical granular composite microstructure where large grains of chamotte or quartz are embedded in the clay matrix phase. Under load at high temperature, the behavior of material is influenced by the nature of the clay matrix phase that progressively melt at high temperature, the type of chamotte or quartz grains, the grain sizes of different phases and the sequence of the thermal transformations during firing. Kinetics of creep under a constant load were characterized against temperature and time. It gives the typical temperatures at fixed creep strains, that’s a well-recognized method for the refractoriness quantification. It’s shown that the kinetic of creep change with the variation of viscosity with temperature of the melted clay matrix phase, that’s related to both the chemical composition and the extend of the micro-composite nature of the heat transformed clays. Results also indicated that values of activation energy for creep are correlated to the refractoriness of materials.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87879667","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: 3

Synthesis and Characterization of Physical Properties of the NiO Thin Films by Various Concentrations 不同浓度NiO薄膜的合成及物理性能表征

IF 1.3

Advances in Materials Science Pub Date : 2020-09-01 DOI: 10.2478/adms-2020-0017

B. Maaoui, Y. Aoun, S. Benramache, A. Nid, R. Far, A. Touati

引用次数: 4

Characterization of Dissimilar Al-Cu BFSW Welds; Interfacial Microstructure, Flow Mechanism and Intermetallics Formation 不同Al-Cu BFSW焊缝的表征界面微观结构、流动机理及金属间化合物形成

IF 1.3

Advances in Materials Science Pub Date : 2020-09-01 DOI: 10.2478/adms-2020-0016

A. Tamadon, M. Abdali, D. Pons, D. Clucas

{"title":"Characterization of Dissimilar Al-Cu BFSW Welds; Interfacial Microstructure, Flow Mechanism and Intermetallics Formation","authors":"A. Tamadon, M. Abdali, D. Pons, D. Clucas","doi":"10.2478/adms-2020-0016","DOIUrl":"https://doi.org/10.2478/adms-2020-0016","url":null,"abstract":"Abstract The purpose of this study is to elucidate the flow features of the dissimilar Al-Cu welded plates. The welding method used is Bobbin Friction Stir Welding (BFSW), and the joint is between two dissimilar materials, aluminium alloy (AA6082-T6) and pure copper. Weld samples were cut from along the weld line, and the cross-sections were polished and observed under an optical microscope (OM). Particular regions of interest were examined under a scanning electron microscope (SEM) and analysed with Energy Dispersive X-ray Spectroscopy (EDS) using the AZtec software from Oxford Instruments. The results and images attained were compared to other similar studies. The reason for fracture was mainly attributed to the welding parameters used; a higher rotational speed may be required to achieve a successful BFSW between these two materials. The impact of welding parameters on the Al-Cu flow bonding and evolution of the intermetallic compounds were identified by studying the interfacial microstructure at the location of the tool action. The work makes an original contribution to identifying the solid-phase hybrid bonding in Al-Cu joints to improve the understanding of the flow behaviours during the BFSW welding process. The microstructural evolution of the dissimilar weld has made it possible to develop a physical model proposed for the flow failure mechanism.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74068546","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: 3

Effect of Rare-Earth Co-Doping on the Microstructural and Magnetic Properties of BaFe12O19 稀土共掺杂对BaFe12O19微观结构和磁性能的影响

IF 1.3

Advances in Materials Science Pub Date : 2020-09-01 DOI: 10.2478/adms-2020-0014

P. Güler, B. Ertuğ, N. İ. Işıkcı, A. Kara

{"title":"Effect of Rare-Earth Co-Doping on the Microstructural and Magnetic Properties of BaFe12O19","authors":"P. Güler, B. Ertuğ, N. İ. Işıkcı, A. Kara","doi":"10.2478/adms-2020-0014","DOIUrl":"https://doi.org/10.2478/adms-2020-0014","url":null,"abstract":"Abstract Ba0.85(La,Y)0.15Fe12O19 hexaferrite magnets were produced using the powder metallurgy method. The phase analysis of the ferrite magnets was carried out by X-ray diffraction (XRD) technique. A single hexaferrite phase was present in both samples as revealed by XRD patterns. The microstructural evolution in the hexaferrite samples was examined using Scanning Electron Microscopy (SEM) equipped with Energy Dispersive X-Ray Spectroscopy (EDS). The grain morphology altered with the sintering temperature. Room temperature ferrimagnetic hysteresis curves were obtained by Vibrating Sample Magnetometer (VSM). The crystallite size and the lattice parameters (a,c) were also calculated after sintering at 1150ºC and 1250ºC. Saturation magnetizations, Ms were determined to be 48.60 emu/g and 52.95 emu/g for the samples sintered at 1150ºC and 1250ºC, respectively whereas the remanent magnetizations, Mr were 29.26 emu/g and 31.17 emu/g. The coercivity, Hc decreased from 3.95 kOe to the value of 2.44 kOe with the sintering temperature due to the increase of the crystallite size. The squareness ratios (Mr/Ms) of the ferrimagnetic samples were different because the uniaxial anisotropies altered after sintering at 1150ºC and 1250ºC. The maximum energy product, (BH)max dropped from 35.81 kJ/m3 to 27.38 kJ/m3 when the sintering temperature increased. This result can be attributed to a combination of higher magnetization and the lower coercivity.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79919242","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: 4

Innovations in Poly(Vinyl Alcohol) Derived Nanomaterials 聚乙烯醇衍生纳米材料的创新

IF 1.3

Advances in Materials Science Pub Date : 2020-09-01 DOI: 10.2478/adms-2020-0013

Ayesha Kausar

引用次数: 7

Effect of Temperature on the Properties of Nickel Sulfide Films Performed by Spray Pyrolysis Technique 温度对喷雾热解法制备硫化镍薄膜性能的影响

IF 1.3

Advances in Materials Science Pub Date : 2020-09-01 DOI: 10.2478/adms-2020-0015

A. Gahtar, S. Benramache, C. Zaouche, A. Boukacham, A. Sayah

{"title":"Effect of Temperature on the Properties of Nickel Sulfide Films Performed by Spray Pyrolysis Technique","authors":"A. Gahtar, S. Benramache, C. Zaouche, A. Boukacham, A. Sayah","doi":"10.2478/adms-2020-0015","DOIUrl":"https://doi.org/10.2478/adms-2020-0015","url":null,"abstract":"Abstract In this work, we have prepared new materials of the nickel sulfide thin films by using the spray pyrolysis technique for promising co-catalyst to improve the photocatalytic performance or superconductivity. The effect of deposition temperature (523, 573 and 623 K) on structural, optical and electrical properties was investigated. The XRD diffraction shows that the prepared nickel sulfide at 523, 573 and 623 K having an orthorhombic, hexagonal and hexagonal structure, which were Ni3S2, Ni17S18 and NiS2, respectively. The minimum value of crystallite size (45,9 nm) was measured of deposited film at 573K. The thin films prepared at 523 and 573 K have an average transmittance is about 20 %. The prepared Ni1S2 thin film at T=623 K has the lowest calculated optical band gap and Urbach energy. The Ni1S2 thin film also has the best calculated of the refractive index and the extinction coefficient. The FTIR spectrums of the nickel sulfide have various bands such as Ni-S, C-H, O-H, N–H and C-S. The maximum electrical conductivity is 4,29x105 (Ω.cm)−1 was obtained at 573K of the Ni17S18. The nickel sulfide thin films sprayed at 573K have good structural, optical and electrical properties.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90450916","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: 8

Thermophysical Characterization of an Insulating Bio-material Based on the Macerate of ''Néré'' (Parkiabiglobosa) Pods and Cow Dung 基于“nassir”豆荚和牛粪浸渍的绝缘生物材料的热物理特性研究

IF 1.3

Advances in Materials Science Pub Date : 2020-07-23 DOI: 10.11648/j.am.20200902.13

D. Armand, Adamon Gildas David, Houngbeme Carlos, H. Aristide, Houehanou C. Ernesto, Vianou Antoine

{"title":"Thermophysical Characterization of an Insulating Bio-material Based on the Macerate of ''Néré'' (Parkiabiglobosa) Pods and Cow Dung","authors":"D. Armand, Adamon Gildas David, Houngbeme Carlos, H. Aristide, Houehanou C. Ernesto, Vianou Antoine","doi":"10.11648/j.am.20200902.13","DOIUrl":"https://doi.org/10.11648/j.am.20200902.13","url":null,"abstract":"This work concerns the thermophysical characterization of a bio-eco-material made from cow dung and the macerate of nere pods. To achieve this, chemical tests based on tannin concentration determination of four different solutions of nere pods (60 g.l-1; 120 g.l-1; 180 g.l-1 and 240 g.l-1) were prepared at 100°C, then brought to the boil for 5 minutes. After three different maceration times (6 h; 24 h and 48 h), the analysis of the solutions obtained using a spectrometer made it possible to select the solutions of 120 g.l-1 and 180 g.l-1 which offer best tannin concentrations in 24 hours, necessary for making test pieces. Thermal tests based on thermal effusivity and thermal conductivity measurements were then carried out in transient mode, with hot strip method. In order to compare the thermal performance of developed eco-material with that of ordinary insulators, the thermophysical properties of plywood and plaster were also measured. The results obtained showed that for the two dosages of 120 g.l-1 and 180 g.l-1, the thermal effusivity of eco-insulator varies from 247.732 J.K-1.m-2.s-0,5 to 270.732 J.K-1.m-2.s-0,5 respectively and the thermal conductivity from 0.082 W.m-1.K-1 to 0.080 W.m-1.K-1. For the same dosages, the thermal diffusivity varies from 1.106.10-7 m².s-¹ to 0.881.10-7 m².s-¹ respectively. A comparative study has shown that the eco-material developed and tested offers better insulating power due to its relatively weak thermophysical properties compared to ordinary insulating materials, namely plaster and plywood.","PeriodicalId":7327,"journal":{"name":"Advances in Materials Science","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2020-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79227283","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: 0

Effect of Depth Surface Defects in Carbon Fibre Reinforced Composite Material on the Selected Recurrence Quantifications 碳纤维增强复合材料表面深度缺陷对重复量化选择的影响

IF 1.3

Advances in Materials Science Pub Date : 2020-06-01 DOI: 10.2478/adms-2020-0011

K. Ciecieląg, K. Kęcik, K. Zaleski

引用次数: 4

Towards the Optimization of Process Parameters for Impact Strength of Natural Fiber Reinforced Composites: Taguchi Method 天然纤维增强复合材料冲击强度工艺参数优化:田口法

IF 1.3

Advances in Materials Science Pub Date : 2020-06-01 DOI: 10.2478/adms-2020-0010

S. S. Yusuf, M. N. Islam, M. H. Ali, M. Akram, M. Siddique

引用次数: 4