3 research outputs found

    Analysis of bulk behaviour of particles based on their individual properties

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    An in-depth understanding of bulk behaviour of particles based on their individual properties is a vital step for the powder handling industries, a good example is the selection of appropriate powder material and their flow consistency in additive manufacturing process which would have significant effects on the quality of the final products. Identification of the most reliable method to characterise powder flow behaviour in correlation to the conditions of powder spreading is still challenging. For instance, the low consolidation state of the powders within the process requires a characterisation technique which is capable of measurement for such conditions

    Analysis of the osteogenic and mechanical characteristics of iron (Fe2+/Fe3+)-doped 尾鈥慶alcium pyrophosphate

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    The calcium phosphate is the main mineral constituent of bone. Although there has been significant amount of research on finding ideal synthetic bone, no suitable scaffold material has yet been found. In this investigation, the iron doped brushite (CaHPO4路2H2O) has been investigated for osteogenic potential and mechanical properties. The synthesis of iron-oxide doping in the form of Fe2+,3+-ions were carried out using the solution based method in which the ammonium hydrogen phosphate and calcium nitrate solutions were used in stoichiometric ratio for synthesizing CaHPO4路2H2O, with doping concentrations of Fe2+,3+-ions between 5鈥痬ol% and 30鈥痬ol%. The synthesized powders were analysed using X-ray powder diffraction, FTIR, SEM and Raman spectroscopic techniques. The heat treatment of synthesized powder was carried out at 1000鈥癈 in air for 5鈥痟, and it was found that the dominant crystalline phase in samples with <20鈥痬ol% was 尾-CPP, which also formed an iron-rich solid solution phase. Increasing the concentrations of Fe2+,3+-ions enhances the phase fraction of FePO4 and amorphous phase. Amongst the Fe2+,3+-doped 尾-CPP minerals, it was found that the 10鈥痬ol% Fe2+,3+-doped 尾-CPP offers the best combination of bio-mechanical and osteogenic properties as a scaffold for bone tissue regenerative engineering
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