In this paper, the construction, and operation of a locally design cold plasma reactor are described. The anode diameter effect is studied in three inner diameters 5 mm, 10 mm, and 15 mm. This effect on the discharge and plasma characteristics is studied using oxygen and argon gases. It was found that the optimum diameter is 10 mm. Moreover, the plasma density and temperature are investigated using a cylindrical Langmuir probe at the optimum diameter. It is found that the electron temperature reaches 1.6 eV and the electron density reaches 2.3x108 cm−3 in the case of oxygen gas. On the other hand the X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier-transform infrared spectroscopy (FTIR) analysis are used for chractrized the manganese cobalt doped ferrite (Mn0.5Co0.5Fe2O4) nanoparticles sample before and after oxygen plasma irradiation. The obtained results showed that cold plasma reactor is constructed with high efficiency to meet the required applications such as surface modification, plasma deposition and etching.
{"title":"Design, characterization and applications of direct current plasma source","authors":"A. Atta, A. M. Abdel reheem, H. El-Khabeary","doi":"10.1680/jemmr.22.00008","DOIUrl":"https://doi.org/10.1680/jemmr.22.00008","url":null,"abstract":"In this paper, the construction, and operation of a locally design cold plasma reactor are described. The anode diameter effect is studied in three inner diameters 5 mm, 10 mm, and 15 mm. This effect on the discharge and plasma characteristics is studied using oxygen and argon gases. It was found that the optimum diameter is 10 mm. Moreover, the plasma density and temperature are investigated using a cylindrical Langmuir probe at the optimum diameter. It is found that the electron temperature reaches 1.6 eV and the electron density reaches 2.3x108 cm−3 in the case of oxygen gas. On the other hand the X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier-transform infrared spectroscopy (FTIR) analysis are used for chractrized the manganese cobalt doped ferrite (Mn0.5Co0.5Fe2O4) nanoparticles sample before and after oxygen plasma irradiation. The obtained results showed that cold plasma reactor is constructed with high efficiency to meet the required applications such as surface modification, plasma deposition and etching.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45351004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nowadays, optical filters with high-level performances are highly demanded. While examining the light transmission properties of both periodic and random one-dimensional photonic crystals, it is observed that the random 1D photonic structures have more favorable properties to meet these demands. With the influence of randomness, the novel single and dual-channel narrowband filters at 1550 nm wavelength for optical telecommunication are presented in this study. For designing the narrowband filters, the central wavelength precision, quality factor, and peak transmission are of great importance. The randomness can be attained by permuting the refractive indices of two dielectric materials via the binomial coefficient method. Wherein the light transmission properties are calculated using the Transfer Matrix Method. The proposed filters show ultra-narrowband transmission peaks with the very minimum Full Width at Half Maximum of 0.24 nm in the single-channel narrowband filter; 0.08 nm and 0.095 nm in the dual-channel narrowband filter at the chosen spectral region than the existing narrowband filters based on the defective 1D photonic structures.
{"title":"1D randomised photonic crystals: the influence as single and dual channel narrowband filter","authors":"L. R., P. Aruna Priya, C. Nayak","doi":"10.1680/jemmr.21.00178","DOIUrl":"https://doi.org/10.1680/jemmr.21.00178","url":null,"abstract":"Nowadays, optical filters with high-level performances are highly demanded. While examining the light transmission properties of both periodic and random one-dimensional photonic crystals, it is observed that the random 1D photonic structures have more favorable properties to meet these demands. With the influence of randomness, the novel single and dual-channel narrowband filters at 1550 nm wavelength for optical telecommunication are presented in this study. For designing the narrowband filters, the central wavelength precision, quality factor, and peak transmission are of great importance. The randomness can be attained by permuting the refractive indices of two dielectric materials via the binomial coefficient method. Wherein the light transmission properties are calculated using the Transfer Matrix Method. The proposed filters show ultra-narrowband transmission peaks with the very minimum Full Width at Half Maximum of 0.24 nm in the single-channel narrowband filter; 0.08 nm and 0.095 nm in the dual-channel narrowband filter at the chosen spectral region than the existing narrowband filters based on the defective 1D photonic structures.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44662381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Volcanic tuffs extracted from the quarries of Bayburt province in Turkey are of three different types locally identified as White, Yellow, and Green Bayburt stone, deriving from their colours. In t...
{"title":"Determination of Some Physical-Mechanical Properties of Volcanic Tuff Using Non-Destructive Method","authors":"CanÖmer","doi":"10.1680/JEMMR.21.00056","DOIUrl":"https://doi.org/10.1680/JEMMR.21.00056","url":null,"abstract":"Volcanic tuffs extracted from the quarries of Bayburt province in Turkey are of three different types locally identified as White, Yellow, and Green Bayburt stone, deriving from their colours. In t...","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49108765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study carries out free-vibration analysis of a cracked tapered beam with a constant width and a linearly varying thickness. The finite-element and component mode synthesis methods are used to ...
{"title":"Free-vibration analysis of cracked beam with constant width and linearly varying thickness","authors":"HaskulMehmet, KisaMurat","doi":"10.1680/JEMMR.21.00015A","DOIUrl":"https://doi.org/10.1680/JEMMR.21.00015A","url":null,"abstract":"This study carries out free-vibration analysis of a cracked tapered beam with a constant width and a linearly varying thickness. The finite-element and component mode synthesis methods are used to ...","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67476591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, Mg65Ni25Y5B5 metallic glass by melt spinning technique was examined in terms of its electrochemical hydrogen storage characteristic, mechanical and thermal behaviors. The XRD and SEM results indicated that the alloy ribbon has a fully amorphous structure. The thermal behavior of the alloy ribbon was determined using flash differential scanning calorimetry (Flash DSC). According to Flash DSC results, the amorphous alloy ribbon exhibited distinct glass transition temperature (T g ) and wide supercooled liquid region (ΔT x = T x − T g ) before crystallization. Accordingly, T g and ΔT x are 195 °C and 63 °C, respectively. Mechanical behavior of the Mg-based alloy at room temperature was determined by means of Vickers microhardness (HV) tester. The microhardness value of the alloy ribbon was measured 336,8 HV. The discharge capacity of the Mg65Ni25Y5B5 alloy reached 313 mAhg−1. The cycle stability revealed that the alloy ribbon protected at least 76.7% of its initial discharge capacity at 12th charge-discharge cycle.
研究了熔融纺丝法制备的Mg65Ni25Y5B5金属玻璃的电化学储氢特性、力学性能和热性能。XRD和SEM结果表明，合金带具有完全非晶结构。采用flash差示扫描量热法(flash DSC)测定了合金带的热行为。根据Flash DSC结果，非晶合金带在结晶前表现出明显的玻璃化转变温度(T g)和较宽的过冷液区(ΔT x = T x−T g)。因此，T g和ΔT x分别为195℃和63℃。采用维氏显微硬度计(HV)测定了镁基合金的室温力学行为。合金带的显微硬度值为336,8 HV。Mg65Ni25Y5B5合金的放电容量达到313 mAhg−1。循环稳定性分析表明，在第12次充放电循环时，合金带至少保护了76.7%的初始放电容量。
{"title":"Electrochemical hydrogen storage, mechanical and thermal behaviors of novel Mg-based alloy","authors":"Celal Kursun","doi":"10.1680/jemmr.22.00044","DOIUrl":"https://doi.org/10.1680/jemmr.22.00044","url":null,"abstract":"In this study, Mg65Ni25Y5B5 metallic glass by melt spinning technique was examined in terms of its electrochemical hydrogen storage characteristic, mechanical and thermal behaviors. The XRD and SEM results indicated that the alloy ribbon has a fully amorphous structure. The thermal behavior of the alloy ribbon was determined using flash differential scanning calorimetry (Flash DSC). According to Flash DSC results, the amorphous alloy ribbon exhibited distinct glass transition temperature (T g ) and wide supercooled liquid region (ΔT x = T x − T g ) before crystallization. Accordingly, T g and ΔT x are 195 °C and 63 °C, respectively. Mechanical behavior of the Mg-based alloy at room temperature was determined by means of Vickers microhardness (HV) tester. The microhardness value of the alloy ribbon was measured 336,8 HV. The discharge capacity of the Mg65Ni25Y5B5 alloy reached 313 mAhg−1. The cycle stability revealed that the alloy ribbon protected at least 76.7% of its initial discharge capacity at 12th charge-discharge cycle.","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67478013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The use of steel plates in the joints of wooden structures is a common practice. However, because of the presence of natural moisture in the wood, steel sheets are easily corroded and for this reas...
在木结构的接缝处使用钢板是一种常见的做法。然而，由于木材中存在天然水分，钢板很容易被腐蚀，因此……
{"title":"Use of The FRP Plates Instead of Steel Sheets in the Joints of Wooden Structures","authors":"AlsheghriAbdullah, AkgülTahir","doi":"10.1680/JEMMR.21.00057","DOIUrl":"https://doi.org/10.1680/JEMMR.21.00057","url":null,"abstract":"The use of steel plates in the joints of wooden structures is a common practice. However, because of the presence of natural moisture in the wood, steel sheets are easily corroded and for this reas...","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67476604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of Structural Parameters on Bending Behaviour of Honeycomb Sandwich Panel","authors":"Çetin Karakaya, S. Ekşi","doi":"10.1680/jemmr.21.00082","DOIUrl":"https://doi.org/10.1680/jemmr.21.00082","url":null,"abstract":"","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67476680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of Fiber Direction & Density on Mechanic Behavior of Robotic 3D Printed Composites","authors":"A. İpekçi, B. Ekici","doi":"10.1680/jemmr.21.00120","DOIUrl":"https://doi.org/10.1680/jemmr.21.00120","url":null,"abstract":"","PeriodicalId":11537,"journal":{"name":"Emerging Materials Research","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67477373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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