García das Neves, RobertoEscribano Quintana, Juan AntonioFerrari, BegoñaGordo Odériz, ElenaSánchez-Herencia, A. J.2013-05-172013-05-172012-08-01Key Engineering Materials, 2012, v. 520, 335-340.1013-9826https://hdl.handle.net/10016/16983The 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.text/plainapplication/pdfeng© Trans Tech PublicationsSlurriesDispersantSpray dryParticle size distributionWaterresearch articleIngeniería IndustrialMaterialesQuímica10.4028/www.scientific.net/KEM.520.335open access335340Key engineering materials520AR/0000012489