Materials Literature
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Abstract Melting reactions of CuBr, BiBr3 and Bi2Q3 (Q = S or Se) resulted in black needles of quaternary chalcogenide bromides. Cu1.5Bi2.64S3.42Br2.58 has a melting point of 708(5) K and crystallizes in the monoclinic space group C2/m with a = 1315.1(3) pm, b = 410.28(5) pm, c = 937.2(2) pm, β = 90.33(2)° at T = 293(…
High strength and ductile Mg96Zn2Y2 (at%) alloys with multi-modal microstructure are developed. Microstructure of the extruded Mg96Zn2Y2 alloy consists of three regions; the dynamically recrystallized -Mg fine-grains region, the hot-worked -Mg coarse-grains region elongated along extrusion direction, and the long-pe…
Glycerol (Gy) and di-hydroxyl stearic acid (DHSA) were selected for potential plasticizers of kenaf filled chitosan bio-composites (KCB). Plasticized KCB at various concentrations of plasticizers (0.2%, 0.4% and 0.6%) were obtained by mixing using high speed homogenizer (10,000 to 29,000 rpm) followed by simple castin…
Two series of nanocomposite films were prepared from waterborne poly(ester-urethane) and chitin whisker with and without ultrasound treatment coded as CW/WPU and CHW/WPU, respectively. The effects of ultra-sonification method and chitin whisker content on the chemical compositions, crystallization behavior and miscibi…
The concept of microfibrillar composite (MFC) has been used to create a new type of polymer composites, in which the reinforcing microfibrils are loaded with carbon nanotubes (CNT). Polyamide 66 (PA66) has been melt blended with polypropylene in a twin screw extruder with and without CNT, and thereafter cold drawn to…
The nanometer carbon black (CB) was employed to prepare epoxy resin/carbon black (EP/CB) composites by blending-casting method. The different modified methods of silicone coupling agent were used to improve the dispersion of CB in epoxy resin. The mechanical and thermal properties of EP/CB composites were investigated…
Scanning electron microscope (SEM) image contrasts have been investigated for dislocations in semiconductor and metal materials. It is revealed that single dislocations can be observed in a high contrast in SEM images formed by backscattered electrons (BSE) under the condition of a normal configuration of SEM. The BSE…
The nanocomposites of boron-nitrogen containing phenol formaldehyde resin (BNPFR) and organic-montmorillonite (O-MMT) (BNPFR/MMT) were synthesized from phenol, formaldehyde, boric acid, ammonia water and montmorillonite. The thermal properties of nanocomposites were characterized. The results show that the remaining w…
We report the synthesis and characterization of NiSn dendrimer-encapsulated nanoparticles (DENs) with sizes in the range of approximately 1.2 nm. These types of materials have potential applications in energy storage, and particles in the 1-3 nm size range are particularly attractive for this use. The NiSn DENs descri…
Self-formation of MgO or Al 2O3 surface layer on CuMg or CuAl alloys by annealing in H 2 gas was investigated theoretically and experimentally. Theoretical consideration shows that Mg or Al can segregate to the surface of Cu during the annealing, while the enrichment ability is much stronger for Mg . Meanwhile, the Mg…
Lean duplex stainless steels have been developed in Korea for the purpose of being used in the seawater systems of industries. The flow velocity of some part of seawater systems in nuclear power plants is high and damages of components from corrosion are severe. Therefore, this environment requires using high strength…
Due to the water absorption of wood fillers and poor adhesion between wood fillers and polymer matrix, the loosen material structure always appears in wood/polymer composites after injection molding process, which results in reduced composites mechanical properties. In this study, two kinds of wood particles with diff…
Zn1-xCoxO thin films ( ) have been grown on Si (100) substrates by pulsed laser deposition. The as-prepared films showed paramagnetic characteristics at room temperature, while the films after annealing in a H2 atmosphere exhibited clear ferromagnetic behaviors. Raman scattering has been used to study the influence of…
Este trabalho foi desenvolvido com o objetivo de avaliar a qualidade de painéis MDF produzidos pelas indústrias brasileiras com base nos resultados de propriedades físicas e mecânicas dos painéis tipo “standard” com 15 mm de espessura. Foram selecionadas quatro empresas produtoras de painéis MDF, que foram identificad…
We prove that every diband of subdimonoids of type Γ is a semilattice of subdimonoids each of which is a rectangular diband of subdimonoids of type Γ. А. В. Жучок.Дисвязки поддимоноидов // Мат.Студiї.-2010.-Т.33, №2.-C.120-124.Доказано, что каждая дисвязка поддимоноидов типа Γ является полурешеткой поддимоноидов, кажд…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionORIGINAL ARTICLEThis notice is a correctionMultistep Crystal Nucleation: A Kinetic Study Based on Colloidal CrystallizationTian Hui Zhang and Xiang Yang Liu*Cite this: J. Phys. Chem. B 2010, 114, 29, 9720Publication Date (Web):June 30, 2010Publication History Publish…
A near-α high temperature titanium alloy, Ti-6Al-2.5Sn-4Zr-0.7Mo-0.30Si, was produced with various Y contents from 0 to 0.7wt% by arc-melting technique to study the influence of Y on its microstructure and mechanical properties. It was found that small amount of Y obviously refines the grain size of Ti-6Al-2.5Sn-4Zr-0…
제주도 표선리 현무암 원광을 이용하여 연속 방사에 의해 현무암 섬유를 제조하였다. 먼저 현무암의 용융특성을 확인하기 위하여 현무암 원광을 백금도가니에 넣고 $1550^{\circ}C$ 로 용융시킨 후, 물속에서 급냉하였다. 냉각한 후 X-선 회절, 열팽창, 고온 점도, 고온 전기전도도와 고온 현미경을 측정 분석하여 연속방사 조건을 조사하였다. 연속 섬유를 제조하기 위한 최적의 방사 온도와 고온 점도는 각각 $1264^{\circ}C$ 와 $10^{2.8}$ poise이었다. 제조된 방사 섬유의 특성은 인장강도, 전자현미경 관찰, 내열시험 등으로 확인하였다. 부싱 온…
Silicon carbide ( SiC ) materials have been extensively studied for high temperature components in advanced energy system and advanced gas turbine. The SiC ceramics have been fabricated by a NITE (Nano Infiltration Transient Eutectic Phase) Process, using Nano- SiC powder. The sintering additives used for forming liqu…
Composites of jute fabric and gelatin were prepared by solution casting or solution-impregnation technique. Jute content in the composite was optimized on the basis of their mechanical properties. Composite containing 50% jute showed best mechanical properties in terms of tensile strength (TS), tensile modulus (TM), b…