Journal of Advanced Ceramics最新文献_第4页

Anisotropic Thermal Expansion of Zirconium Diboride: An Energy-Dispersive X-Ray Diffraction Study 二硼化锆的各向异性热膨胀:能量色散x射线衍射研究

IF 16.9 1区材料科学

Journal of Advanced Ceramics Pub Date : 2016-08-31 DOI: 10.1155/2016/8346563

W. Paxton, T. E. Özdemir, İ. Şavklıyıldız, T. Whalen, Hülya Biçer, E. K. Akdoğan, Z. Zhong, T. Tsakalakos

引用次数: 11

Mechanical Properties of ZTA: Correlation with Structural Properties and Influence of Ageing ZTA的力学性能:与组织性能的关系及时效的影响

IF 16.9 1区材料科学

Journal of Advanced Ceramics Pub Date : 2016-06-08 DOI: 10.1155/2016/4264062

C. Exare, J. Kiat, N. Guiblin, V. Petříček

引用次数: 8

Microelectrical Discharge Machining:A Suitable Process for Machining Ceramics 微电子放电加工:一种适合加工陶瓷的工艺

IF 16.9 1区材料科学

Journal of Advanced Ceramics Pub Date : 2015-08-31 DOI: 10.1155/2015/470801

A. Schubert, H. Zeidler, Ralf Kühn, M. Hackert-Oschätzchen

{"title":"Microelectrical Discharge Machining:A Suitable Process for Machining Ceramics","authors":"A. Schubert, H. Zeidler, Ralf Kühn, M. Hackert-Oschätzchen","doi":"10.1155/2015/470801","DOIUrl":"https://doi.org/10.1155/2015/470801","url":null,"abstract":"Today ceramics are used in many industrial applications, for example, in the biomedical field, for high-temperature components or for cutting tools. This is attributed to their excellent mechanical and physical properties, as low density, high strength, and hardness or chemical resistance. However, these specific mechanical properties lead to problems regarding the postprocessing of ceramics. In particular, cutting processes require expensive tools which cause high manufacturing costs to machine ceramics. Consequently, there is a demand for alternative machining processes. Microelectrical discharge machining (micro-EDM) is a thermal abrasion process which is based on electrical discharges between a tool and a workpiece. The advantages of micro-EDM are more and more in focus for ceramic machining. These advantages include the process of being a noncontact technology, an independency of material brittleness and hardness, a low impact on the material, and the achievable microstructures. This paper presents the current state of investigations regarding micro-EDM of ceramics. Beside the process principle of EDM, the used procedures for machining ceramics and insulating ceramics are described. Furthermore several machining examples are presented to demonstrate the possibilities of the micro-EDM process with regard to the machining of ceramics.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":"82 1","pages":"1-9"},"PeriodicalIF":16.9,"publicationDate":"2015-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76107414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22

Cubic Phases in the Gd2O3-ZrO2 and Dy2O3-TiO2 Systems for Nuclear Industry Applications 核工业用Gd2O3-ZrO2和Dy2O3-TiO2体系的立方相研究

IF 16.9 1区材料科学

Journal of Advanced Ceramics Pub Date : 2015-08-11 DOI: 10.1155/2015/298690

M. T. Malachevsky, Diego Rodríguez Salvador, S. Leiva, C. D’Ovidio

{"title":"Cubic Phases in the Gd2O3-ZrO2 and Dy2O3-TiO2 Systems for Nuclear Industry Applications","authors":"M. T. Malachevsky, Diego Rodríguez Salvador, S. Leiva, C. D’Ovidio","doi":"10.1155/2015/298690","DOIUrl":"https://doi.org/10.1155/2015/298690","url":null,"abstract":"Neutron absorbers are elements with a high neutron capture cross section that are employed at nuclear reactors to control excess fuel reactivity. If these absorbers are converted into materials of relatively low absorption cross section as the result of neutron absorption, they consume during the reactor core life and so are called burnable. These elements can be distributed inside an oxide ceramic that is stable under irradiation and thus called inert. Cubic zirconium oxide is one of the preferred materials to be used as inert matrix. It is stable under irradiation, experiments very low swelling, and is isomorphic to uranium oxide. The cubic phase is stabilized by adding small amounts of dopants like Dy2O3 and Gd2O3. As both dysprosium and gadolinium have a high neutron cross section, they are good candidates to prepare burnable neutron absorbers. Pyrochlores, like Gd2Zr2O7 and Dy2Ti2O7, allow the solid solution of a large quantity of elements besides being stable under irradiation. These characteristics make them also useful for safe storage of nuclear wastes. We present a preliminary study of the thermal analysis of different compositions in the systems Gd2O3-ZrO2 and Dy2O3-TiO2, investigating the feasibility to obtain oxide ceramics useful for the nuclear industry.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":"12 1","pages":"1-7"},"PeriodicalIF":16.9,"publicationDate":"2015-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75301891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The Effect of Thickness of Aluminium Films on Optical Reflectance 铝膜厚度对光学反射率的影响

IF 16.9 1区材料科学

Journal of Advanced Ceramics Pub Date : 2015-02-09 DOI: 10.1155/2015/213635

Robert Lugolole, S. K. Obwoya

引用次数: 11

Structural and Ferroic Properties of La, Nd, and Dy Doped BiFeO3 Ceramics La、Nd和Dy掺杂BiFeO3陶瓷的结构和铁性能

IF 16.9 1区材料科学

Journal of Advanced Ceramics Pub Date : 2015-02-04 DOI: 10.1155/2015/869071

Ashwini Kumar, Poorva Sharma, D. Varshney

引用次数: 19

Preparation, Structural, Electrical, and Ferroelectric Properties of Lead Niobate–Lead Zirconate–Lead Titanate Ternary System 铌酸铅-锆酸铅-钛酸铅三元体系的制备、结构、电学和铁电性能

IF 16.9 1区材料科学

Journal of Advanced Ceramics Pub Date : 2015-02-04 DOI: 10.1155/2015/835150

Rashmi R. Gupta, S. Verma, Vishal Singh, K. Bamzai

{"title":"Preparation, Structural, Electrical, and Ferroelectric Properties of Lead Niobate–Lead Zirconate–Lead Titanate Ternary System","authors":"Rashmi R. Gupta, S. Verma, Vishal Singh, K. Bamzai","doi":"10.1155/2015/835150","DOIUrl":"https://doi.org/10.1155/2015/835150","url":null,"abstract":"A ternary system of lead niobate–lead zirconate–lead titanate with composition xPN–yPZ–(x-y)PT where and , 0.25, and 0.35 known as PNZT has been prepared by conventional mixed oxide route at a temperature of 1100°C. The formation of the perovskite phase was established by X-ray diffraction analysis. The surface morphology studied by scanning electron microscopy shows the formation of fairly dense grains and elemental composition was confirmed by energy dispersive X-ray analysis. Dielectric properties like dielectric constant and dielectric loss ( and ) indicate poly-dispersive nature of the material. The temperature dependent dielectric constant () curve indicates relaxor behaviour with two dielectric anomalies. The poly-dispersive nature of the material was analysed by Cole-Cole plots. The activation energy follows the Arrhenius law and is found to decrease with increasing frequency for each composition. The frequency dependence of ac conductivity follows the universal power law. The ac conductivity analysis suggests that hopping of charge carriers among the localized sites is responsible for electrical conduction. The ferroelectric studies reveal that these ternary systems are soft ferroelectric.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":"12 1","pages":"1-12"},"PeriodicalIF":16.9,"publicationDate":"2015-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81857053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Synthesis of β-SiC Fine Fibers by the Forcespinning Method with Microwave Irradiation 微波辐照挤压法合成β-SiC细纤维

IF 16.9 1区材料科学

Journal of Advanced Ceramics Pub Date : 2015-01-29 DOI: 10.1155/2015/217931

A. Salinas, M. Lizcano, K. Lozano

{"title":"Synthesis of β-SiC Fine Fibers by the Forcespinning Method with Microwave Irradiation","authors":"A. Salinas, M. Lizcano, K. Lozano","doi":"10.1155/2015/217931","DOIUrl":"https://doi.org/10.1155/2015/217931","url":null,"abstract":"A rapid method for synthesizing β-silicon carbide (β-SiC) fine fiber composite has been achieved by combining forcespinning technology with microwave energy processing. β-SiC has applications as composite reinforcements, refractory filtration systems, and other high temperature applications given their properties such as low density, oxidation resistance, thermal stability, and wear resistance. Nonwoven fine fiber mats were prepared through a solution based method using polystyrene (PS) and polycarbomethylsilane (PCmS) as the precursor materials. The fiber spinning was performed under different parameters to obtain high yield, fiber homogeneity, and small diameters. The spinning was carried out under controlled nitrogen environment to control and reduce oxygen content. Characterization was conducted using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The results show high yield, long continuous bead-free nonwoven fine fibers with diameters ranging from 270 nm to 2 µm depending on the selected processing parameters. The fine fiber mats show formation of highly crystalline β-SiC fine fiber after microwave irradiation.","PeriodicalId":14862,"journal":{"name":"Journal of Advanced Ceramics","volume":"94 1","pages":"1-5"},"PeriodicalIF":16.9,"publicationDate":"2015-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90520554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Coefficient of Thermal Diffusivity of Insulation Brick Developed from Sawdust and Clays 木屑和粘土保温砖的热扩散系数

IF 16.9 1区材料科学

Journal of Advanced Ceramics Pub Date : 2014-12-29 DOI: 10.1155/2014/861726

E. Bwayo, S. K. Obwoya

引用次数: 20

Modeling of Thermal and Mechanical Behavior of ZrB2-SiC Ceramics after High Temperature Oxidation ZrB2-SiC陶瓷高温氧化后热力学行为模拟

IF 16.9 1区材料科学

Journal of Advanced Ceramics Pub Date : 2014-11-11 DOI: 10.1155/2014/169748

Jun Wei, L. Dharani, K. Chandrashekhara, G. Hilmas, W. Fahrenholtz

引用次数: 6