Nayak, Kanhu C.
Kim, Se-Hoon
Lee, Jin-Won
Bae, Donghyun
Ahn, Jae-Pyong
Lee, Kon-Bae
Choi, Hyun-Joo
2025-06-18T03:00:15Z
2025-06-18T03:00:15Z
2025-06-13
2025-05
2238-7854
https://pubs.kist.re.kr/handle/201004/152626
Giga-strength Al/SiC composites with exceptional strength (>1 GPa) and stiffness (>200 GPa), yet low density (<3.0 g/cm(3)), are produced through a simple yet transformative process that utilizes nitrogen's critical influence on the matrix-reinforcement interface, known as Nitrogen-Induced Self-Forming Aluminum Composites (NISFAC). The Al matrix, reinforced with 20-50 vol% microsized SiC particles, exhibited significant enhancements of mechanical properties, with a 471.93 % increase in compressive strength and a 189.33 % improvement in Young's modulus compared to monolithic aluminum. These improvements are attributed to the formation of aluminum nitride (AlN) and aluminum oxynitride (Al(O)N), which originate on the Al powder surface and integrate into the matrix and Al-SiC interface during the nitrogen-induced self-sintering process. Detailed microstructural analysis revealed the critical role of these phases in load transfer from the matrix to the reinforcement. Mechanistic insights and novel predictive models further validated the contributions of reinforcements to the yield strength and Young's modulus. The Al/50 %SiC composite achieved compressive strength over 1 GPa and Young's modulus over 200 GPa, highlighting its potential for advanced structural applications.
English
Elsevier Editora Ltda
Advancing giga-strength and high-modulus aluminum matrix composites via nitrogen-induced self-forming process
Article
10.1016/j.jmrt.2025.05.067
1
Journal of Materials Research and Technology, v.36, pp.8876 - 8894
Journal of Materials Research and Technology
36
8876
8894
Y
scie
scopus
001499281500024
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Materials Science
Metallurgy & Metallurgical Engineering
Article
MECHANICAL-PROPERTIES
ELASTIC-MODULUS
YOUNGS MODULUS
PARTICLE-SIZE
MICROSTRUCTURE
NANOCOMPOSITES
REINFORCEMENT
INDENTATION
BEHAVIOR
FRACTURE
Al/SiC composite
Nitrogen-induced self-sintering
Interface
Giga-strength
Nanoindentation
Strengthening mechanism