Materials science

Linear Horn: The linear horn, also known as the straight-sided horn, is a cone-shaped shell with no curvature, it is the oldest and simplest design. The pressure change through the horn is linear as a sound wave moves through it, so there is no distortion of the sound. The gradual change in the cross-sectional area of the horn decreases distortion and provides a good phase response due to compressed air in the throat. Devices intended to reproduce human voices, such as the megaphone, are…

Titanium is a low-density element (has 60% density of steel), that be able to be highly modified by alloying and distortion processing. Titanium is non magnetic, non toxic and has good heat transfer properties. Titanium and its alloys have melting points advanced those of steels, but maximum useful temperatures for structural applications usually range from 425-540C°. Titanium has good resistance to attack by most mineral acids and chlorides [ASM]. The combination of high strength, stiffness,…

interfacial attachment is the use of bioactive materials (type3). The concept of bioactive materials is intermediate between resorbable and bioinert. Certain compositions of glasses, ceramics, glass-ceramics, and composites have been shown to bond to bone. These materials are also called bioactive ceramics. Some, even more specialized compositions of bioactive glasses, will bond to soft tissues as well as bone. A common characteristic of such bioactive materials is a modification of the surface…

4.TAGUCHI ANALYSIS FOR THE EXPERIMENTAL RESULTS To examine the 100Cr6 bearing steel through DCT, and to identify the optimum parameter condition of the DCT process, the prediction of the Taguchi analysis is used. The Taguchi analysis and ANOVA, gives the optimized parameter setting and the most influential factor of the DCT process respectively. The quality performance of the deep cryo-treated 100Cr6 steel samples based on the L9 OA was evaluated by conducting the reciprocatory wear tests.…

the extraordinary range of properties. Polymers are among the most widely used and important type of materials today. Polymers have been with us from the beginning of time; they form the very basis (building blocks) of life. Animals, plants all classes of living organisms are composed of polymers. Polymers can be classified according to origin: synthetic macromolecules made of fossil raw materials (such as petrochemicals produced by cracking or refining of crude oil), or naturally occurring…

CHARACTERISTICS Often materials are subject to forces (loads) when they are used. The mooring lines have to withstand the loads acting on the moored structure in addition to loads acting directly on the mooring components (Bjørnsen 2014). Mechanical engineers calculate those forces and material scientists how materials deform (elongate, compress, and twist) or break as a function of applied load, time, temperature, and other conditions (Virginia.edu 2013). 1.4.1. Tensile Load The mooring line…

Paragraph 1 The crystal chemical relationship between quartz (SiO2) and FePO4 can be studied by putting them under a temperature range of 294K to 1073K in an attempt to study the evolution of their structures. In doing so, we would able to examine the other quartz homeotypes that emerge during high temperatures and known to show a-b transitions. This study of quartz homeotypes were essential because the new information that was gathered would aid greatly in the creation of new products and more…

for Granite epoxy specimens is documented and listed in Table 5.1. Table 5.1 Compression Test results for Granite Epoxy Specimens Figure 5.1 shows the compressive strength plot of granite epoxy composite specimens without the inclusion of filler material. From the graph, it is observed that the compressive strength of the fabricated specimen’s increases up to 70% granite content and further decreases with the increase in epoxy percentage. The maximal compressive strength obtained is 112MPa for…

HARDNESS Hardness of a material is most commonly defined as the measure of its resistance to penentration by an indenter.Hardness is also measure of strength and often has the units of stress .The indenter is often fabricated from a hard material such as diamond or hardened steel.The tips of the indenters may be conical,pyramidal,or spherical in shape.The indenter tips may also be relatively small(nano-or micro-indenters) or very large(macroindenters).Since indentation tests are relatively easy…

The SEM result was also in good agreement of XRD analysis. The average particle size of CuMnRC1, CuMnRC2 and CuMnRC3 catalyst was 0.675µm, 3.127µm and 7.435µm respectively. The particles of CuMnRC1 catalyst was least agglomerated, highly porous, high surface area and uniformly distributed. The choice of different precipitant in the CuMnOx catalysts leads to the change of the surface distribution of Cu, Mn and O elements, which might be related to the CO oxidation catalytic performance of the…