Jang, Haneul Kim, Sung-Hoon Lee, Nohyun Cha, Pil-Ryung Ahn, Jae-Pyong Choi, Hyunjoo Lee, Kon-Bae 2024-01-19T12:02:39Z 2024-01-19T12:02:39Z 2022-05-27 2022-05 2238-7854 https://pubs.kist.re.kr/handle/201004/115217 In our previous work, we introduced a simple process of manufacturing Al matrix composites (AMCs) without vacuum or external pressure, which employs an exothermic reaction accompanying the nitridation of Al, called nitridation-induced self-forming Al composites (NISFAC). This paper investigates the self-sintering mechanism of AMCs in this NISFAC to understand why self-sintering only occurs in nitrogen (no other gas atmospheres) and surface modification of Al and SiC particles occurs during heating only in this atmosphere. The surfaces of the Al powder change from an oxide film to an Al(O)N film, an Al droplet containing Al(O)N, Al-O, and then come into contact with the liquid Al, thereby improving wettability between the liquid Al and SiC particles. By employing combined examination of microscopic and thermal analysis, we found that the interface structures of the prepared AMCs are advantageous in very close contact. (c) 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). English Elsevier Editora Ltda Mechanism for self-formation of Al matrix composites using nitridation-induced manufacturing processes Article 10.1016/j.jmrt.2022.03.130 1 Journal of Materials Research and Technology, v.18, pp.2331 - 2342 Journal of Materials Research and Technology 18 2331 2342 Y scie scopus 000793121000005 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article SURFACE-TENSION ALUMINA LAYER PURE ALUMINUM PARAMETERS NITROGEN BEHAVIOR AL2O3 Aluminum matrix composites Nitridation Sintering mechanism