Materials Literature
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Let Fn be the nth Fibonacci number. The order of appearance z(n) of a natural number n is defined as the smallest natural number k such that n divides Fk. In 1975, J. Sallé proved that z(n) ≤ 2n, for all positive integers n. In this paper, we shall provide sharper upper bounds for z(n) which are substantially smaller…
Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.
The growth of series of actual laser crystals belonging to dierent structural types by the Czochralski method is presented. The primary attention is given to single crystalline compounds and their solid solutions with garnet structure (scandium-containing rare-earth garnets with general formula {LnSc}3[ScMe]2Me3O12, M…
Fe2O3 doped MnO2 (Fe-HEMD) with various mole percents had been synthesized via a simple solid-state synthesis using electrolytic manganese dioxide (EMD). Structure and morphology of synthesized materials were characterized by X-ray diffraction and scanning electron microscope, respectively. The XRD results revealed th…
Durch Druckeinwirkung auf den herkömmlichen Zeolith ITQ-29 gelang erstmals die druckinduzierte Festphasensynthese eines Zeoliths (siehe Schema; Si gelb, O rot): Das Produkt, ITQ-50, hat eine einzigartige mikroporöse Struktur und ist leistungsfähiger in der Propen-Propan-Trennung als das Ausgangsmaterial ITQ-29.
Abstract The grain size of coated cemented carbide tools may significantly affect the tool life by influencing either the coating adhesion to the substrate or the coating growth during deposition. In the present study three variously grained cemented carbides were coated with two different PVD films. Various pre‐ and…
A study of the characteristics of ferromagnetic signatures obtained by magnetoelectric (ME) laminate sensors has been performed. Anderson functions were used to analyze the signatures, which were found to be dependent on several parameters. An array imager was then developed using multiple ME sensors, which demonstrat…
Aim of this study was to combine the well-known biocompatibility and ostoeconductivity of thin calcium phosphate coatings on titanium with proangiogenic signals from codeposited copper species. Copper species could be integrated in mineral layers based on hydroxyapatite by means of electrochemically assisted depositio…
The variable output of renewables such as wind and solar causes fluctuations of power flow that can adversely affect power system operation, especially at high levels of penetration. The coordination of multiple energy storage solutions can mitigate integration challenges by providing a buffer from variable renewables…
Exchange coupling between two magnetic layers through an interlayer is of broad interest for numerous recent applications of nano-magnetic systems. In this letter, we study ferromagnetic exchange coupling through amorphous paramagnetic Fe-Ta alloys. We show that the exchange coupling depends exponentially on spacer th…
Method for joint synthesis of C 60 fullerene and new carbon molecules in the form of C 3 -C 15 and quasifullerenes C 48 , C 42 , and C 40 , alternative to arc-discharge technique, was developed for the first time. The process of fullerenization of benzene molecules into carbon molecules is performed at comparatively l…
The electrical properties of the structure of GaN grown on an Si (111) substrate with low-temperature (LT) AlN interlayers by metal—organic chemical-vapour deposition are investigated. An abnormal P-type conduction is observed in our GaN-on-Si structure by Hall effect measurement, which is mainly due to the Al atom di…
Nickel–phosphorus carbon nanotube (CNT) composite coatings were prepared via brush electroplating. The CNTs were added in amounts of 0, 0·5, 1·0 and 2·0 g L−1. Half samples of these coatings were heated at 400°C for 1 h to obtain crystalline Ni–P CNT composite coatings. The hardness and internal stress of two kinds of…
In this work, a new glucose amperometric biosensor was developed by directly electrospinning poly(vinyl alcohol)/chitostan nanofibers on the surface of the platinum electrode, in which glucose oxidase (GOD) was effectively immobilized in nanofibers by encapsulation. After been cross-linked in glutaraldehyde vapor and…
REX-10 is a fully-passive small modular reactor in which the coolant flow is driven by natural circulation, the RCS is pressurized by a steam-gas pressurizer, and the decay heat is removed by the PRHRS. To confirm design decisions and analyze the transient responses of an integral PWR such as REX-10, a thermal-hydraul…
Composites sheets based on short wool fibres and polypropylene were fabricated by extrusion process. A three-factor two-level experimental design using Taguchi method was applied in manufacturing the composites to explore the contribution of each parameter on mechanical properties. Fire retardant behaviour of the comp…
Complex functional perovskite oxides find use in a wide range of applications as dielectric, electronic, photocatalytic, optical, and ion-conducting materials. The ability to synthesize perovskites in hierarchical structures can allow for new properties or phenomena not observable in bulk morphologies. Herein we repor…
NASA Astronaut Dr. Pettit carried out a thermocapillary flow experiment onboard the International Space Station in 2003. In this experiment a thin water film containing milk powder was formed in a stainless-steel wire ring. Heating a section of the ring by a soldering iron induced in the water film a thermocapillary f…
Abstract The thermoreactive deposition and diffusion process is a heat-treatment-based method to form coatings with compacted layers of carbides, nitrides, or carbonitrides, onto some carbon/nitrogen-containing materials, including steels. The amount of active carbide forming elements/nitride forming elements, coating…
Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.