Materials Literature
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The specific activity of 238U, 232Th and 40K was determined in 60 soil samples were collected from sites around the uranium mine in the Abu - Skhair in Najaf province, Iraq. The samples were determined using NaI(Tl) gamma ray spectrometry system. Mean values for 238U, 232Th and 40K specific activity were found to be (…
This is first such study on porosity formation phenomena observed in dual-scale fiber preforms during the synthesis of metal matrix composites (MMCs) using the gas-based pressure infiltration process (gas PIP). In this thesis, different mechanisms of porosity formation during pressure infiltration of Al-Si alloys into…
Anodic oxidation of carbon fabricated on an FTO-glass electrode was done to improve the electrochemical active area of the carbon electrode, which is anticipated for use as a platinum-free counter electrode of Dye-sensitized Solar Cells (DSCs). The electrochemical properties of the carbon electrode with various anodiz…
Generally, fly ash particles are very fine, mainly spherical and glassy materials form an outer shell on it. This paper deals with the laboratory investigation of ground fly ash based geopolymer. This material can be applied in many fields, mainly in the construction industry, e.g. non-structural elements, concrete, p…
Aquesta tesi es basa en un tipus de dispositius fotovoltaics, les cel•les solars sensitivitzades amb colorant. Des de fa un parell de decades, l’estudi d’aquests dispositius ha anat en augment i actualment ja s’han publicat resultats amb mes d’un 13% d’eficiencia. S’estudien els diferents components d’aquest dispositi…
Magneto-electro-elastic (MEE) materials belong to the category of multi-phase materials where different phases within the materials including elastic, electric, and magnetic ones can interact for the optimal response.These materials are usually composites made of multi-phases or laminae and exhibit magnetoelectric (ME…
Exhaust heat recovery systems are used to make use of otherwise wasted heat from a car engine. The unique system design described herein utilises thermoelectric generators (TEGs) and heat pipes with its key advantage being it is a passive solid state design. The use of these components creates a few design constraints…
Cement mortar is a semi liquid formed by a composite of cement, sand and water. Generally, cement mortar is used as a medium for bricks laying in construction. Nowadays, the properties of various types of waste materials are studied as construction material in buildings such as blast furnace ash, fly ash and palm oil…
The mining company Luossavaara-Kiirunavaara AB (LKAB) operates two underground iron ore mines in Sweden. Both mines use large scale sublevel caving to extract the ore at a depth of nearly one kilometre and are, since 2008, regarded as seismically active. Rock support is therefore essential in order to maintain safe an…
In this research some metal surfaces, includes; Stainless steel 316,carbon steel, Copper, Aluminum ,and Zinc, were coated with thin and homogeneous polyaniline (PANI) via electro-polymerization of aniline monomer in sulfuric acid, then the corrosion protectiveness of these coatings in artificial seawater solution (3.5…
Single crystals of L-Alanine 2-Furoic acid (LAL2FA) were grown from aqueous solution by slow evaporation method at room temperature. The grown crystal was characterized by XRD, FTIR, optical, thermal, dielectric and second order nonlinear optical property. LAL2FA crystallizes into orthorhombic crystal system with spac…
ABSTRACTAn experimental study for obtaining a high performance ceramics of titanium diboride and tungsten carbide composites (TBWC) are described. WC content 10 to 90 volume percent tungsten was examined. The TBWC is inexpensive and can be fabricated by a hotpress-sintering process. The TBWC with density 95 % and abov…
In the present work silver nanoparticles was synthesized from stem bark extract of Terminalia tomentosa Roxb. (Wight & Arn.), a plant widely found in a large region in India, as reducing agent. Terminalia tomentosa Roxb. (Wight & Arn.) is known to be rich in antioxidant molecules which was used as reducing agents. Sil…
X ray magnetic circular dichroism XMCD , longitudinal ac and transverse TS ac magnetic susceptibility have been measured in the RCo2 series R Ho, and Tm as a functionof temperature and applied magnetic field. We show that parimagnetism is a general behavior among the RCo2 ferrimagnetic series R being a heavy rare eart…
The corrosion of austenitic stainless steel (type 304) in dilute sulphuric acid solutions in addition to recrystalized sodium chloride concentrates in the presence of specific proportions of phenylamine was studied with the aid of polarization resistance technique, electrode potential monitoring and coupon method. Res…
Functional graded materials are extensively applied in many innovative technologies, e.g. solid oxide fuel cells, solar cells, membranes, piezoactuators, capacitors, and thermoelectric systems. The synergy of advantageous combinations of composites with different composition and/or microstructure together with recentl…
Titanium dioxide(TiO2)thin films were synthesized via sol-gel spin coating method using titanium tetra isopropoxide (TTIP) as starting material. TTIP is dissolved in ethanol stabilized by glacial acetic acid. TiO2 thin films were prepared for different proportions of acetic acid. The prepared samples were dried at 250…
Steel is an incombustible substrate, but at elevated temperatures structural steel suffers from a drastic reduction in mechanical strength. In the event of a fire, the reduced strength may lead to collapse of the structure. A method to prolong the time before steel reaches the critical temperature (450 - 600 °C), at w…
Of the various feedstocks for cellulose bioethanol, wood appears to be an excellent energy source because it requires relatively less energy to grow and process. The exact chemical composition is wood-species specific and plays an important role in determining the material properties. In the context of hydrolyzing the…
It is significant to evaluate the corrosion resistance of a new stainless steel, SUS443J1, in atmospheric environment. In this study, the growth behavior of pits on the surface of a ferritic stainless steel, SUS443J1, and an austenitic stainless steel, SUS304, were compared by field exposure tests and electrochemical…