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Material tested that could guarantee body protheses for more than 150 years
Date:2/23/2010

rmendia investigated the capacity for the displacement and dispersion of the composite obtained from the previous process, and also looked for its suitable point of density. Based on this and aided by plaster, she achieved the first compact pieces.

Subsequently, Ms Garmendia specified the number of coated nanotubes each piece had to have in order to achieve the optimum density at the end of the process. According to the researcher, adding zirconia nanoparticles to the nanotubes facilitates the dispersion of the material and reduces its viscosity, apart from helping to increase its density for the next and last stage: the synterisation stage. Synterisation is a process, used particularly in ceramics, in order to transform the material from powder to a compact solid. Not just any quantity is useful to achieve this maximum possible density and, thus, before synterisation, it has to be decided how many nanotubes are to be introduced and, of course, synterisation has to be subsequently carried out correctly.

As Ms Garmendia calculated, if the intention is to obtain the maximum possible density (98%), in order to start the composition, 1% of its volume must be of coated nanotubes. Finally, the material has to be synterised in argon for one hour at 1,300 degrees; not more nor less.


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Contact: Amaia Portugal
a.portugal@elhuyar.com
34-943-363-040
Elhuyar Fundazioa
Source:Eurekalert

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