Materials Literature
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The mixed structures of bainite matrix, austenite and nodular graphite were obtained in nodular cast iron treated by controlled cooling and austempering in electric oven instead of nitrate salt bath. The relations between bainitic morphology and mechanical properties were investigated. Experimental results show that,…
A modified bio-polymers was prepared by melt reactive blending Poly(3-hydroxybutyrate-co-4-hydroxybutyrate) [P(3HB-co-4HB)] with commercial chain extenders (ADR-4367). Steady shear and oscillatory measurements were employed to characterize viscoelastic properties of the chain extended bio-polymres. The results show th…
Interest in the behavior and resistance of structures for blast mitigation of high explosive charges is growing more and more. In this paper, the residual axial resistance of steel compressive members damaged by blast loading was precisely evaluated using the explicit-to-implicit finite element analysis method. The em…
SUMMARY Manganese doped biphasic calcium phosphate powders have been synthesized via sol-gel method. The powders are of nanosize and high crystallinity. Dense pure BCP and Mn-doped BCP ceramics were fabricated via uniaxial pressing using the sol-gel derived powders. The compacted discs were sintered in air atmosphere…
No abstract.
주거 건축 및 가구산업의 자재로써 합성목재(Wood-Plastic Composites)는 점차 각광받고 있다. 본 연구에서는 합성목재의 연소특성을 살펴보기 위하여 한계산소지수 측정(ASTM D 2863) 및 콘칼로리미터 시험(ISO 5660-1)을 실시하였으며 또한 일반목재인 적송(red pine)과 방부 처리를 한 방부목에 대하여도 동일한 시험을 통하여 합성목재와 연소특성을 비교ㆍ검토하였다. 한계산소지수 측정결과 합성목재가 적송 및 방부목에 비해 가장 낮게 측정되었다. 콘칼로리미터 시험결과 합성목재의 열방출률값이 가장 빨리 피크치에 도달하였고 점차적으로 감소하였다…
Abstract Background: Polymerized liposomal nanoparticles (PLNs) are a promising new technology for delivery of chemotherapeutic drugs to cancer cells. They are easy to prepare, biocompatible, and can carry a wide variety of therapeutics. Additionally, PLNs have the potential to be conjugated to a tumor targeting agent…
Recent developments in the ITER experimental fusion reactor require that a 316L stainless steel substructure be bonded to a precipitation strengthened CuCrZr heat sink alloy, C18150. This bond defines the cooling water pressure boundary. Given the importance of this interface, a variety of experiments with fusion weld…
A two-dimensional thermal response and ablation analysis code for predicting charring material ablation and shape change on solid rocket nozzle is presented. The thermogravimetric analysis (TGA) techniques have been used to characterize the thermal decomposition constants for Arrhenius parameters. Two heterogeneous re…
A WIG(Wing-In-Ground effect) craft flies close to the water surface by utilizing a cushion of relatively high pressurized air between its wing and water surface. This implies that when one designs such craft it is important to have lightweight structures with adequate strength to resist external loads with some margin…
Silk sericin protein was hydrolyzed by seven proteolytic enzymes to examine the effectiveness of the hydrolysates to bind iron. The amino acid nitrogen contents of hydrolysates by Flavourzyme were higher than the others enzymes, and its iron binding capacity showed dose-dependent increase. The bioavailability of iron…
티타늄 표면처리방법 중 gold 코팅, TiN 코팅, 그리고 전용결합재를 복합적으로 사용하여 티타늄과 세라믹의 결합강도에 미치는 영향을 분석하고자 하였다. 티타늄과 세라믹의 3점 굽힘 결합강도를 측정한 결과, TiN 코팅과 전용결합재로 처리한 SPTB군이 72.20(±5.25)㎫로 가장 높게 나타났으며, 전용결합재로 처리한 SPB군(67.66(±12.10)㎫), gold 코팅과 전용결합재로 처리한 SPGB군(46.95(±12.48)㎫), 코팅과 전용결합재로 처리하지 않은 SP군(43.80(±5.12)㎫) 순으로 나타났다. 시편들의 결합강도를 통계 분석한 결과, 전용…
A simple half order system is proposed to approximate the pore diffusion model describing the mass transfer dynamics in a particle. It is shown to approximate the entire frequency response of the pore diffusion model and can be used for any operation pattern. Implementation issues for the half order system are investi…
El ciment de fosfat, obtingut d’una reaccio acid-base en medi aquos entre KH2PO4 i MgO, presenta unes bones propietats mecaniques , pero tot i que no es competitiu front d’altres tipus de ciment, hi ha bastants estudis que demostren amb exit possibles aplicacions com a morters reparadors, encapsuladors de residus radi…
??During the gasification of waste materials, syngas (mainly CO, H₂) can be used to convert to electricity by gas engine. However, it is not suitable for generating electricity because syngas has low heating value; 3,500~4,000 ㎉/㎏ in the gasification process. So incombustible CO₂ among the syngas is selectively requir…
For few years, carbon nanotubes (CNTs) are added to in various materials. As CNTs have high mechanical, thermal and electrical properties, it is expected to boost by adding CNTs the performances of the matrix material. Usually carbon nanotubes are used as additive to an organic matrix and in small quantities, below 1…
스마트그리드 실증 연구단지 구축에 있어 계통과 풍력발전의 연계 사이에 풍력발전의 전압안정화 및 무효전력 보상을 위하여 현재 실증용으로 소용량 STATCOM이 적용될 예정이다 본 논문에서는 1MVA STATCOM의 실제 제작에 앞서 설계 검증을 위한 PSCAD/EMTDC를 이용한 모델링을 수행하고, 기본적인 모의를 통하여 모델링이 올바르게 이루어졌는지 확인하였다.
O presente trabalho, com vista à obtenção do grau de Mestre em Engenharia Electromecânica, tem como objectivo estudar um problema real existente num equipamento do sector têxtil, apresentando algumas soluções para esse efeito. A falha deste equipamento deve-se à rotura de um veio quando solicitado por diversos esforço…
Active metal template synthesis is an efficient strategy for the preparation of mechanically interlocked molecules. The main feature of this new procedure is that the metal plays a dual role during the formation of the interlocked molecule, acting as both a template for threa- ding the submolecular components and as a…
4-methyl anisole is oxidized, in a first stage to produce a cation radical that undergoes deprotonation. Although a single oxidation peak is reported in literature corresponding to the loss of two electrons, we have been able to split it into a couple of peaks for one electron each. The cation radical is deprotonated…