Improvement of Ti Processing through Colloidal Techniques

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Show simple item record García das Neves, Roberto Escribano Quintana, Juan Antonio Ferrari, Begoña Gordo Odériz, Elena Sánchez-Herencia, A. J. 2013-05-17T10:11:54Z 2013-05-17T10:11:54Z 2012-08-01
dc.identifier.bibliographicCitation Key Engineering Materials, 2012, v. 520, 335-340.
dc.identifier.issn 1013-9826
dc.description.abstract The colloid-chemistry control of metallic powders in aqueous slurries is proposed as a way to prepare Ti powders with small particle size for a better pressing behavior through the spray dry process. The chemical-physic behavior of titanium powders with two different particle size distributions dispersed in water has been studied by measuring the zeta potential as a function of pH, and dispersant concentration. The employment of poly-acrylic dispersants allowed the fabrication of stable slurries with solid contents up to 50 vol% that have been sprayed under different conditions to form agglomerates ranging between 50 and 200 µm. Conditions were selected to achieve spherical agglomerates formed by a broad distribution of particle sizes that shown excellent flowability. Agglomerates were pressed in a uniaxial die to measure the compressibility, showing an improvement in pressing behavior with respect to powders with bigger particle size. The sintering behavior is also improved, as values of 96 % of the theoretical density were obtained for compacts sintered in vacuum at 1100 ºC for 30 minutes.
dc.format.mimetype text/plain
dc.format.mimetype application/pdf
dc.language.iso eng
dc.rights © Trans Tech Publications
dc.subject.other Slurries
dc.subject.other Dispersant
dc.subject.other Spray dry
dc.subject.other Particle size distribution
dc.subject.other Water
dc.title Improvement of Ti Processing through Colloidal Techniques
dc.type article
dc.subject.eciencia Ingeniería Industrial
dc.subject.eciencia Materiales
dc.subject.eciencia Química
dc.identifier.doi 10.4028/
dc.rights.accessRights openAccess
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 335
dc.identifier.publicationlastpage 340
dc.identifier.publicationtitle Key engineering materials
dc.identifier.publicationvolume 520
dc.identifier.uxxi AR/0000012489
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