Bioceramics: Materials and Applications IV, Volume 147 - download pdf or read online

ISBN-10: 1118406060

ISBN-13: 9781118406069

ISBN-10: 1574982028

ISBN-13: 9781574982022

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G. at the nozzle of the spray-drier). Figures 3 and 4 show a discontinuity in the storage modulus at low shear rates. The increase of the storage modulus is caused by 28 Bioceramics: Materials and Applications IV formation of structures of particles and surfactants which are broken up at higher shear rates. Addition of the binder has caused a narrowing of the critical shear stress range. The viscosity is at a low value, ensuring good pumpability. Fig. 000 Shear stress [Pa] The agglomeration of the suspensions was carried out by means of a top down cocurrent flow spray-drying tower of the IMTCCC.

J 22 23 24 25 26 27 28 29 30 31 32 33 34 35 2Θ Scale Fig. M 33 32 In particular regarding to TCP coatings is it of crucial importance to know whether a- or ß-phase is present, or eventually a combination of the two, because of their different solubilities in the human body. Our experiments evidenced that is it possible to obtain thermally sprayed coatings made of pure a- TCP (fig. 8) but also coatings made of a mixture of the two phases (fig. 9). This is possible by means of a very accurate tuning of the processing parameters, achieving this way the melting only of the powder external surface, whereas the core is not subjected to phase transformations.

In aqueous solution with calcium and phosphate ions, the reduction reaction at cathode in an electrolytic system causes local increase in pH that reduces the solubility of CaP minerals. As a result, CaP minerals with various morphologies deposit onto the cathode surface. With modification of solution parameters it is possible to control the coating microstructure. Since ECD is usually performed at relatively low temperatures cracking may be ameliorated. In this study, we describe an ECD protocol that produced crack-free CaP coatings with controllable nano-scale texture.

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Bioceramics: Materials and Applications IV, Volume 147


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