Journal: Materials最新文献_第4页

Structural Characteristics and Magnetic Properties of Al2O3 Matrix-Based Co-Cermet Nanogranular Films Al2O3基共金属陶瓷纳米颗粒膜的结构特征和磁性能

Journal: Materials Pub Date : 2015-11-11 DOI: 10.1155/2015/834267

G. Cuong, N. Tuan, N. Anh, Dinh Van Tuong, Nguyen Anh Tue, N. Nga, Do Phuong Lien

{"title":"Structural Characteristics and Magnetic Properties of Al2O3 Matrix-Based Co-Cermet Nanogranular Films","authors":"G. Cuong, N. Tuan, N. Anh, Dinh Van Tuong, Nguyen Anh Tue, N. Nga, Do Phuong Lien","doi":"10.1155/2015/834267","DOIUrl":"https://doi.org/10.1155/2015/834267","url":null,"abstract":"Magnetic micro- and nanogranular materials prepared by different methods have been used widely in studies of magnetooptical response. However, among them there seems to be nothing about magnetic nanogranular thin films prepared by a cosputtering technique for both metals and insulators till now. This paper presented and discussed preparation, structural characteristics, and magnetic properties of alumina ( ) matrix-based granular Co-cermet thin films deposited by means of the cosputtering technique for both Co and . By varying the ferromagnetic (Co) atomic fraction, , from 0.04 to 0.63, several dominant features of deposition for these thin films were shown. Structural characteristics by X-ray diffraction confirmed a cermet-type structure for these films. Furthermore, magnetic behaviours presented a transition from paramagnetic- to superparamagnetic- and then to ferromagnetic-like properties, indicating agglomeration and growth following Co components of Co clusters or nanoparticles. These results show a typical granular Co-cermet feature for the Co- thin films prepared, in which Co magnetic nanogranules are dispersed in a ceramic matrix. Such nanomaterials can be applied suitably for our investigations in future on the magnetooptical responses of spinplasmonics.","PeriodicalId":17611,"journal":{"name":"Journal: Materials","volume":"49 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2015-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73437651","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

Early-Age Strength Measurement of Shotcrete 喷射混凝土早期强度测定

Journal: Materials Pub Date : 2015-11-10 DOI: 10.1155/2015/470160

A. Mohajerani, Daniel Rodrigues, Christopher Ricciuti, C. M. Wilson

{"title":"Early-Age Strength Measurement of Shotcrete","authors":"A. Mohajerani, Daniel Rodrigues, Christopher Ricciuti, C. M. Wilson","doi":"10.1155/2015/470160","DOIUrl":"https://doi.org/10.1155/2015/470160","url":null,"abstract":"Shotcrete or sprayed concrete is a special concrete designed for spraying onto a surface, as a construction material. With shotcrete application as a ground support system ever-present in both mining and tunnelling sectors, a major requirement of drive progression is to determine when it is safe to reenter beneath freshly sprayed concrete. Accurately determining this time is of paramount importance. Generally, this reentry time is based on measuring the developing strength of shotcrete until an adequate strength value is reached. The issue with current practice is that there is no widely accepted or generally preferred method that accurately assesses the shotcrete lining’s true early-age strength. However, there are a number of strength tests that are commercially available and used in the industry; these include the soil penetrometer, needle penetrometer, bolt screws, beam end testers, and drilled core samples. This paper researches into these testing methods and their characteristics in order to determine their accuracy, testing ranges, and suitability for in situ use in the tunnelling and mining industry. The investigation ultimately reveals that current methods all have substantial shortcomings. Based on these findings, recommendations are proposed for the applicable use of the current testing methods and recommendations for future improvements.","PeriodicalId":17611,"journal":{"name":"Journal: Materials","volume":"89 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2015-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81478807","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: 14

Biodegradation Study of Nanocomposites of Phenol Novolac Epoxy/Unsaturated Polyester Resin/Egg Shell Nanoparticles Using Natural Polymers 天然聚合物降解苯酚-环氧树脂/不饱和聚酯树脂/纳米蛋壳复合材料的研究

Journal: Materials Pub Date : 2015-11-08 DOI: 10.1155/2015/131957

S. Mousavi, H. Esmaeili, O. Arjmand, S. Karimi, S. Hashemi

{"title":"Biodegradation Study of Nanocomposites of Phenol Novolac Epoxy/Unsaturated Polyester Resin/Egg Shell Nanoparticles Using Natural Polymers","authors":"S. Mousavi, H. Esmaeili, O. Arjmand, S. Karimi, S. Hashemi","doi":"10.1155/2015/131957","DOIUrl":"https://doi.org/10.1155/2015/131957","url":null,"abstract":"Nanocomposite materials refer to those materials whose reinforcing phase has dimensions on a scale from one to one hundred nanometers. In this study, the nanocomposite biodegradation of the phenol Novolac epoxy and the unsaturated polyester resins was investigated using the egg shell nanoparticle as bioceramic as well as starch and glycerin as natural polymers to modify their properties. The phenol Novolac epoxy resin has a good compatibility with the unsaturated polyester resin. The prepared samples with different composition of materials for specified time were buried under soil and their biodegradation was studied using FTIR and SEM. The FTIR results before and after degradation showed that the presence of the hydroxyl group increased the samples degradation. Also adding the egg shell nanoparticle to samples had a positive effect on its degradation. The SEM results with and without the egg shell nanoparticle also showed that use of the egg shell nanoparticle increases the samples degradation. Additionally, increasing the amount of starch, and glycerol and the presence of egg shell nanoparticles can increase water adsorption.","PeriodicalId":17611,"journal":{"name":"Journal: Materials","volume":"92 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2015-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81262807","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: 31

Diclofenac Potassium Transdermal Patches Using Natural Rubber Latex Biomembranes as Carrier 以天然胶乳生物膜为载体的双氯芬酸钾透皮贴剂

Journal: Materials Pub Date : 2015-11-08 DOI: 10.1155/2015/807948

N. Barros, Paulo A. M. Chagas, F. Borges, J. L. P. Gemeinder, M. C. R. Miranda, B. C. Garms, R. Herculano

引用次数: 29

Removal of Indigo Carmine Dye from Aqueous Solution Using Magnesium Hydroxide as an Adsorbent 用氢氧化镁作为吸附剂去除水溶液中的靛蓝胭脂红染料

Journal: Materials Pub Date : 2015-11-01 DOI: 10.1155/2015/753057

T. N. Ramesh, Vani Pavagada Sreenivasa

引用次数: 30

Plasma Induced Physicochemical Changes and Reactive Dyeing of Wool Fabrics 等离子体诱导羊毛织物的物理化学变化及活性染色

Journal: Materials Pub Date : 2015-10-27 DOI: 10.1155/2015/620370

J. Udakhe, Smita Honade, Neeraj Shrivastava

{"title":"Plasma Induced Physicochemical Changes and Reactive Dyeing of Wool Fabrics","authors":"J. Udakhe, Smita Honade, Neeraj Shrivastava","doi":"10.1155/2015/620370","DOIUrl":"https://doi.org/10.1155/2015/620370","url":null,"abstract":"This study focuses on the effect of dielectric barrier discharge (DBD) plasma treatment on physical and chemical properties of wool fabric and its relation to exhaustion of Drimalan Navy Blue FBI reactive dye. AFM analysis of plasma treated wool fabric has shown partial removal of epicuticle and thus reduced scale height. FD spectroscopy has shown improvement in hydrophilicity by many folds after plasma treatment. ATR graphs depict the removal of hydrophobic layer of 18-MEA and introduction of hydrophilic groups like cysteic acid after plasma treatment. Alkali solubility of wool fabric increases with increasing plasma treatment time. Wetting time for plasma treated fabric reduces drastically when compared to untreated wool fabric. It is found that plasma treated fabric takes much lesser time to reach maximum dye exhaustion than untreated fabric. Substantivity of the dye increases significantly after plasma treatment. Colour fastness properties improve with increase in plasma treatment time. Chemical oxygen demand (COD) of spent dyebath liquor is found to reduce with increase in plasma treatment time. Biological oxygen demand (BOD) is found to be higher for plasma treated samples, while ratio of COD/BOD has reduced with increase in the plasma treatment time.","PeriodicalId":17611,"journal":{"name":"Journal: Materials","volume":"12 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2015-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84123383","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

Molecular Dynamics Study on Lubrication Mechanism in Crystalline Structure between Copper and Sulfur 铜与硫晶体结构润滑机理的分子动力学研究

Journal: Materials Pub Date : 2015-10-26 DOI: 10.1155/2015/963257

K. Saitoh, Tomohiro Sato, M. Takuma, Y. Takahashi, R. Chin

{"title":"Molecular Dynamics Study on Lubrication Mechanism in Crystalline Structure between Copper and Sulfur","authors":"K. Saitoh, Tomohiro Sato, M. Takuma, Y. Takahashi, R. Chin","doi":"10.1155/2015/963257","DOIUrl":"https://doi.org/10.1155/2015/963257","url":null,"abstract":"To clarify the nanosized mechanism of good lubrication in copper disulfide (Cu2S) crystal which is used as a sliding material, atomistic modeling of Cu2S is conducted and molecular dynamics (MD) simulations are performed in this paper. The interatomic interaction between atoms and crystalline structure in the phase of hexagonal crystal of Cu2S are carefully estimated by first-principle calculations. Then, approximating these interactions, we originally construct a conventional interatomic potential function of Cu2S crystal in its hexagonal phase. By using this potential function, we perform MD simulation of Cu2S crystal which is subjected to shear loading parallel to the basal plane. We compare results obtained by different conditions of sliding directions. Unlike ordinary hexagonal metallic crystals, it is found that the easy-glide direction does not always show small shear stress for Cu2S crystal. Besides, it is found that shearing velocity affects largely the magnitude of averaged shear stress. Generally speaking, higher velocity results in higher resistance against shear deformation. As a result, it is understood that Cu2S crystal exhibits somewhat liquid-like (amorphous) behavior in sliding condition and shear resistance increases with increase of sliding speed.","PeriodicalId":17611,"journal":{"name":"Journal: Materials","volume":"27 1","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2015-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81865198","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 Vanadium Doped Zinc Oxide Thick Film for Chemical Sensor Application 化学传感器用掺钒氧化锌厚膜的合成与表征

Journal: Materials Pub Date : 2015-10-26 DOI: 10.1155/2015/196545

R. Zargar, M. Arora, Masroor Ahmad, A. K. Hafiz

引用次数: 15

Strength Performance Based on Flexibility from Laterite Soil Using Tire Powder and Micro Silica 基于轮胎粉和微二氧化硅的红土柔韧性强度性能研究

Journal: Materials Pub Date : 2015-10-26 DOI: 10.1155/2015/830903

B. Gordan, A. Adnan

引用次数: 6

Rutherford Backscattering Spectrometry Analysis and Structural Properties of Thin Films Deposited by Chemical Spray Pyrolysis 化学喷雾热解沉积薄膜的卢瑟福后向散射光谱分析及结构特性

Journal: Materials Pub Date : 2015-10-08 DOI: 10.1155/2015/215210

Abiodun Eyitayo Adeoye, E. Ajenifuja, B. Taleatu, A. Fasasi

引用次数: 17