Materials Literature
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A phenolic copolymer (GASA) was synthesized from gallic acid (GA) and sulfamic acid (SAA) using horseradish peroxides (HRP)/H2O2 as catalyst. The effect of the main factors on yield of the copolymer was discussed. The results showed that the maximum yield of copolymer was obtained when molar ratios of GA and SAA was 1…
ADVERTISEMENT RETURN TO BOOKPREVSubject IndexSubject IndexDOI: 10.1021/bk-2012-1096.ix002Publication Date (Web):May 7, 2012Publication History Published online7 May 2012Published inprint 1 January 2012RIGHTS & PERMISSIONSPolymers for Energy Storage and Delivery: Polyelectrolytes for Batteries and Fuel Cellspp 311-315A…
Corrosion resistance of MgO-Spinel (M-S) composite refractories containing various amounts of ZrSiO4-Y2O3 constituents was investigated. Density and open porosity values were measured and evaluated. Corrosion tests of refractories were carried out statically under standard conditions using cylindrical shaped samples i…
Progressive collapse is defined as total or remarkable partial collapse of structure following the damage occurred at a small portion of the structure. In most cases, the study is focused on progressive collapse of structures due to explosion, vehicle impact, fire and other man-made hazards; with less attention on pro…
In this paper, the the micro crystallization behavior of MgO-SiO2-Al2O3-B2O3-KF glass-ceramics which was prepared by sintering and water quenching method was discussed. The study indicated that the compacts shrinkage of MgO-SiO2-Al2O3-B2O3-KF glass-ceramics were related to its vitrification and its component crystalli…
The ABAQUS software was used to analyze the residual stress of TiN film treated by the single point micro-scale laser shock peening (μLSP). In view of the multi-factor effect of μLSP, the response surface methodology (RSM) of Design-Expert software was utilized to analyze the influence of laser process parameters on t…
The variations and developments with the reasons on the mechanical properties of MgO-MgAl2O4 and MgO-ZnO-Al2O3 composite refractories were examined and thermal parameters affecting the durability of composites at high temperatures were investigated. The density, porosity, strength, modulus of elasticity, fracture toug…
The interaction of atomized Co, Ni and CoNi with multi-walled carbon nanotubes has been studied by thermogravimetric analysis (TGA) and electrochemical polarization studies. The composites of the above materials have been prepared in different atomic ratios and investigated for examining the spin polarization. The com…
Chitosan is α (1 → 4) 2-amino 2-deoxy β-D-glucan, having structural characteristics similar to glycosaminoglycans (Figure 1-1). This polycationic biopolymer is generally obtained by alkaline deacetylation at 120°C for 1-3h from chitin, which is the main component of the exoskeleton of crustaceans, such as shrimps [1].…
Critical dimensions for an axial double heterostructure nanowire are studied by using finite-element method based on the energy equilibrium criteria. The results are in good agreement with the experimental data.
Scope1.1 This terminology and acronyms standard covers and defines commonly used terms and acronyms in the field of corrosion. Related terms may be found in Terminologies D16, D4538, G40, or other ASTM terminology standards. 1.2 This terminology and acron
SBGf -Sociedade Brasileira de Geofísica Este texto foi preparado para a apresentação no V Simpósio Brasileiro de Geofísica, Salvador, 27 a 29 de novembro de 2012.Seu conteúdo foi revisado pelo Comitê Técnico do V SimBGf, mas não necessariamente representa a opinião da SBGf ou de seus associados.É proibida a reprodução…
X20CrMoV121 is a 12%Cr martensitic steel which has been used in power plants in Europe for many decades. Superheater tubes exposed for various durations up to 135,000 h in power plants in Denmark at steam temperatures varying from 450 to 575°C were investigated. Light optical and scanning electron microscopy was used…
The durability of alkali-activated slag mortar in seawater environment, compared with that of ordinary portland cement mortar, was studied by drying-wetting test in accelerated laboratory seawater. The drying-wetting resistance, porosity, performance mechanism, and depth of chloride ingress were analyzed. The results…
By using the FEM code LS-DYNA, Hanchak’s test of penetrating concrete slabs was simulated with two concrete models respectively. The two models were K&C and HJC (MAT72R3 and MAT111) which have been added the maximum principal strain as a material erosion criterion. The impact response of concrete slab and projectile h…
.71-4.39 ) (3.011.51-6.18 ) (0.49 0.30-0.80 ) (1.881.15-3.07 ) (13 120.410.21-0.78 ) (0.270.10-0.71 ) (0 Ex/1-23 Ex/0.340.14-0.86 ) (2.771.13-6.76 ) (3.261.07-9.96 )
[…] Ο σκοπός της παρούσας μελέτης ασθενών-μαρτύρων είναι η αναζήτηση σημείων θυρεοειδικής δυσλειτουργίας σε ενήλικες γυναίκες που προσέρχονται στο εξωτερικό δερματολογικό ιατρείο για διερεύνηση ακμής καθώς και η μελέτη της δραστηριότητας του υποθαλαμο-υποφυσιακού επινεφριδιακού (ΗΡΑ) άξονα σε αυτές τις ασθενείς. Επίση…
Ferritic stainless steel is an economical stainless steel which doesn’t contain nickel or a little nickel. It has the broad prospects of application. By using 21% Cr ferritic stainless steel as test material, the paper analyses the microstructure of the joint. The different welding parameters have the different effect…
Concrete degradation in sulfuric acid environment had been widely recognized and the corrosion mechanism needs be further understood. A long time immersion test of concrete specimens in dilute sulfuric acid is carried out. The experiment is designed by uniform design method and through which eight groups of concrete s…
The amounts of waste plastics discarded in developed countries are increasing drastically, and most are not recycled. The small fractions of the post-consumer plastics which are recycled find few new uses as their quality is degraded; they cannot be reused in their original applications. However, the high energy densi…