Hardness

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    this case, sodium alginate (SA) was used to be mixed with hydroxyapatite (HA) by using precipitation method to increase the mechanical and physical properties. The mixing of hydroxyapatite/sodium alginate effectively increases the densification and hardness of hydroxyapatite. It could contribute to the development of the artificial implants of hydroxyapatite (HA) for bone implants applications in load bearing area. The behaviors during densification were studied together with the mechanical…

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    Yttrium Alloying Essay

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    surface alloying technique (DG technique). The results showed that the Zr-Y alloyed layer was comprised of deposited sub-layer and diffused sub-layer, with a total layer thickness of about 20μm. The nano-indentation test result showed that the nano-hardness of Zr-Y alloyed layer was 2.35 times that of γ-TiAl. The scratch test…

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    SAMPLE PREPARATION: Wilcox shale and Pottsville shale samples are tested with the indentation method in this experiment. Both samples are quartz rich and silty shales which contain about 45 to 50% of quartz, 40 to 45% of clays and about 5% of plagioclase. Wilcox shale sample is from Louisiana and formed in upper Cretaceous while Pottsville shale samples are from Alabama and formed in upper Pennsylvanian. These two type of shale rocks are chosen because they are “local” rocks which was abundant…

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    materials have Poisson's ratio between 0.3 and 0.5 (55 ,56). Accordingly, Poisson's ratio of the investigated glass is about 0.2 for 0 mole% and 0.5 mole% Er2O3 content, while it is greater than 0.2 up 0.33 at 2 mole% Er2O3 content, Figure (11). Micro-hardness expresses the required…

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    and bulletproof vests as an armor material. Silicon carbide is also used as a support and shelving material in high temperature kilns such as firing ceramics, glass fusing, or glass casting Abrasive and cutting tools Silicon carbide is used for its hardness and high wear resistance in abrasive machining processes like grinding, honing, sand blasting and water jet cutting Engineering…

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    dissolution enhancer (improve dissolution). Method: Six Formulations were developed with varying concentration of polymer like HPMC and other excipients like tamarind seed powder, magnesium oxide and lactose. Result: The formulations were evaluated for hardness, thickness, surface pH, weight variation, content uniformity, and swelling index. The maximum in vitro drug profile was achieved with the formulation F4 which contain drug , tamarind seed powder,…

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    as a disintegrating agent were used. Tablets were evaluated for the hardness and disintegration time. 5% sodium starch glycolate indicated less disintegration time and optimum hardness. Binders are used to improve the mechanical strength of the formulation. Starch as a binder was tried with three different concentrations, 3 mg, 5 mg and 7 mg, and tablets were evaluated for the hardness and disintegration time. From optimum hardness and less disintefration time, 5% starch is optimised as a…

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    Special Gem Research

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    When shopping for jewelry, you have probably experienced the overwhelming excitement of searching for that Special Gem; the one specifically made for you. With an infinite combination of gems from diamonds to jadeite and everything in between, how do you recognize whether to pick a diamond from a colored gem? Usually you walk in with several ideas, while trying to leave without having buyer’s remorse. It can be like walking into a fancy restaurant unable to decide between Lobster and Steak. The…

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    achieve it’s uses and maintain a balanced biological life, there must be a level of water quality maintained within it. There are many factors that affect the life of water bodies that include; concentrations of common ions, total dissolved solids, hardness, turbidity, acidity, dissolved oxygen and biochemical oxygen demand, heavy metal pollution, eutrophication. A major change in any of these areas can have detrimental affects on marine life and…

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    Particle Deformation and Fragmentation: As compaction force increases, contact area between particles increases, particle deformation starts to occur. Elastic deformation: granules attempt to return to their original shape or form after stress is released. Plastic deformation: granules do not totally recover after stress is released. Fragmentation occurs when compaction force continues to increase Particles fracture, create multiple new surface sites, additional contact points and potential…

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