Formation of spherical alloy microparticles in a porous salt medium

作     者：Hayk HNersisyan Suk Cheol Kwon Vladislav E.Ri Wan Bae Kim Woo Seok Choi Jong Hyeon Lee Hayk H.Nersisyan;Suk Cheol Kwon;Vladislav E.Ri;Wan Bae Kim;Woo Seok Choi;Jong Hyeon Lee

作者机构：RASOMChungnam National University99 Daehak-roYuseong-guDaejeon 34134Republic of Korea Graduate School of Materials Science and EngineeringChungnam National University99 Daehak-roYuseong-guDaejeon 34134Republic of Korea 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2020年第36卷第8期

页      面：189-196页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the Technology Innovation Program(10063427,development of eco-friendly smelting technology for the production of rare metal production for lowering manufacturing costs using solid oxide membrane)funded by the Ministry of Trade,Industry&Energy(MOTIE,Korea) the Competency Development Program for Industry Specialists of the Korean Ministry of Trade,Industry and Energy(MOTIE),operated by Korea Institute for Advancement of Technology(KIAT).(No.P0002019,HRD Program for High Value-Added Metallic Material Expert) supported by the Basic Research Laboratory Program through the Ministry of Education of the Republic of Korea(2019R1A4A1026125) 

主　　题：AlSi(12)alloy Morphology evaluation Particle distribution Simulation Solid-liquid transition Spheroidization 

摘      要：This study describes the development of a one-pot strategy to produce spherical alloy microparticles for advanced near-net-shape manufacturing processes, including additive manufacturing and powder injection molding. The Al Si12 eutectic alloy(ca. 12 wt% Si) system was chosen as the model with which the main experiments were carried out. The proposed process synergistically integrates a few common,low-cost processing techniques including the mixing of Al micrometer size particles with silicon and sodium chloride, heat-treating the mixture at temperatures of 650–810°C, and the dissolution of salt in water to produce spherical Al Si12 alloy particles without the need to rely on costly melting and atomizing techniques. This new process can use laow-cost source Al and Si powders as the raw materials to produce10–200 um-sized spherical particles of Al Si12. The Ansys-CFX computational fluid dynamics software was used to analyze the flow behavior of Al Si12 liquid droplets and particle size refinement in the narrow voids of the sample.