Materials Literature
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He criterion and method of the solution of a problem of the theory of a bending of thin plates on decrease in concentration of stresses in a composite plate is given by optimization of the form of border of connection of various elastic materials.
My current research investigates one and two-dimensional tiling. This thesis will discuss two major categories, periodic and aperiodic tiling, as well as, tiling patterns of many different types and structures. Initially, I will define periodic tiling as a process of decomposing the flat surface into numerous small po…
Os fluxantes so misturas de minerais que em contato com ao iro fundir e gerar uma escria lquida que ir permitir a troca trmica e favorecer a lubrificao ao longo da interface placa/molde. Durante o processo de lingotamento contnuo de placas parte do filme de escria ir solidificar-se tendendo a formar fases amorfas e/ou…
ResumoO estudo do sopro de oxigênio no EOF é muito complexo e envolve diferentes fenômenos, incluindo o desenvolvimento do jato supersônico, a interação do jato com o ambiente ao seu redor e o banho metálico, onde ocorrem importantes reações.No presente trabalho, diferentes alternativas de desenho de lança e bicos e a…
ResumoDefeitos internos do tipo trinca off-corner são um dos principais problemas relacionados à qualidade em tarugos de aços especiais lingotados continuamente.Este tipo de defeito é bastante crítico, pois além de se apresentar de forma descontínua no tarugo e, consequentemente na barra laminada, não é detectável pel…
A espectrometria de emisso ptica uma metodologia de anlise de amostras slidas utilizada pelas indstrias no controle da composio qumica de seus materiais. Nesta tcnica, uma centelha direcionada amostra a ser analisada provocando a excitao dos eltrons de seus elementos, seguida pela emisso de radiao que convertida em co…
Pittini Group has contracted Danieli in 2011 for the supply and replacement of the existing EAF at Ferriere Nord Plant in Osoppo. This was a very challenging project: giving the fact that the Meltshop was operating already under very high performance level, there were many elements involved for the project to improve…
During the BOFs general repair in CSN, the refractories activities like demolition of lining, tuyeres exchange, tapping well block assembly and work and safety lining assembly, belongs to critical path in schedule and are directly responsible in the event dynamics. The tapping well block assembly demanded many activit…
La mayor parte de las mquinas de colada continua de palanquillas que utilizan buzas calibradas y lubricacin con aceite se operan con alta velocidad de colada en secuencias largas, obteniendo alta productividad. Muchos de ellos todava practican la inyeccin de aluminio en el molde, para desoxidar el acero lquido sin rie…
Silver borate glasses doped with Praseodymium of different concentration has been prepared by melt quench technique. X-ray diffraction pattern shows that there is no sharp peak it confirms the amorphous nature of the present glasses. The glass transition temperature (Tg) of this glass system have been studied using th…
Background and Objectives:Helicobacter pylori is a helix-shaped, gram-negative and microaerophilic bacterium. This bacterium is one of the main causes of peptic ulcer disease. Nowadays, multidrug therapy is used to eliminate the bacterium. Unfortunately, drug resistance to these drugs has difficulty in the treatment.…
An examination is made of the effect of ageing on the specific heat of metal-filled polyvinyl butyral, the structure of which is formed in the temperature and pressure regime of pressing at elevated pressures.
Undoped and Li-doped ZnO(LZO) thin films were grown on quartz substrates by a sol-gel spin- coating method. The effects of Li contents on the structural and optical properties of the ZnO thin flims were investigated by X-ray diffraction (XRD), photoluminescence (PL), and ultraviolet-visible spectrophotometer. In the X…
It is shown that the strength characteristics of plastics are influenced significantly by the surface effects at the glass fibre-epoxy binder boundary – wetting, impregnation, and adhesion – depending on the chemical composition of the initial glass and the content of reactive groups in the polymer.
The rheological and physicomechanical properties of homopolymers and block copolymers of propylene and their blends modified with organic peroxide compounds with a structure-forming mode of action were investigated, including at subzero temperatures. A tendency for the strength of the matrices of the initial polypropy…
Plastics Engineering is the official publication of the Society of Plastics Engineers (SPE). We provide plastics professionals with a wealth of information about machinery, technological advances, materials innovations, sustainability, and more.
The paper has conducted a study on the variation of tensile strength for four woven fabrics made from wool type yarns depending on fiber composition, warp and weft yarns tensile strength and technological density using ANCOVA regression model. In instances where surveyed groups may have a known history of responding t…
An investigation was made of the influence of the production equipment on the homogeneity and physicomechanical properties of composites based on polyolefins filled with aluminium trihydrate. The quality of mixing and the degree of dispersion of the components were assessed from the magnitude of the coefficient of var…
The fire safety and physicomechanical properties of three grades of developed composites based on thermoplastic elastomers are given. A method for lowering the flammability of polymers by introducing fireproofing agents is examined.
Work has been carried out to optimise the production of polyamide 6 and layered nanocomposites by anionic polymerisation, during which a layered aluminosilicate is mixed directly with the monomer, catalyst, and activator, and polymerisation of the monomer (oligomer) results in intercalation of the polymer in the inter…