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@Article{OliveiraVernVieiSilv:2019:ObAlPo,
               author = "Oliveira, Isa{\'{\i}}as de and Vernilli Junior, Fernando and 
                         Vieira, Ricardo and Silva, Jorge Vicente Lopes da",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade de S{\~a}o Paulo (USP)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Three-dimensional Technologies 
                         Research Group}",
                title = "Obtainment of the alumina polyamide-coated spherical particles",
              journal = "Powder Technology",
                 year = "2019",
               volume = "356",
                pages = "112--118",
                month = "Nov.",
             keywords = "Additive manufacturing, Indirect-SLS, TIPS, Flowability, Alumina 
                         polyamide-coated, Spherical particles.",
             abstract = "The indirect selective laser sintering (SLS) process consists of a 
                         powder-based additive manufacturing (AM) technique. Recently, an 
                         attempt was carried out using the indirect-SLS method on ceramics 
                         to obtain complex geometric parts without the need to fabricate 
                         tools or molds. In this context, the ceramic particles employed in 
                         indirect-SLS must be coated with a polymer layer and retain 
                         spherical format. Currently, several processes of encapsulation 
                         and balling up of ceramic particles are available, among which 
                         thermally induced phase separation (TIPS) is noteworthy. The 
                         present study describes the synthesis, via TIPS, of spherical 
                         micrometric alumina particles coated with polyamide 12 to be 
                         employed in indirect-SLS. Dimethyl sulfoxide (DMSO) was used as a 
                         solvent to obtain these particles. After encapsulation, the 
                         agglomerates were characterized according to granulometry, 
                         microstructure, thermal behavior, and flowability. The obtained 
                         results delineated the ideal conditions to synthesize agglomerates 
                         with adequate flowability, particle size profile, and similar 
                         thermal behavior to that verified for PA-12, a currently used 
                         material in SLS printing. Based on the results of the present 
                         study, it is possible to confirm the effectiveness of the TIPS 
                         technique in obtaining ceramic polymer-coated spherical particles 
                         that are suitable for use in AM processes via indirect-SLS.",
                  doi = "10.1016/j.powtec.2019.08.003",
                  url = "http://dx.doi.org/10.1016/j.powtec.2019.08.003",
                 issn = "0032-5910",
             language = "en",
           targetfile = "oliveira_obtainment.pdf",
        urlaccessdate = "11 abr. 2021"
}


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