Fabrication of Al/AlN composites by in situ reaction

• Published in: Journal of materials science Vol. 41; no. 19; pp. 6347 - 6352
• Main Authors: LEE, K. B, SIM, H. S, KWON, H
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 01.10.2006; Springer Nature B.V
• Subjects: Alloy powders; Alloying additive; Alloys; Aluminum; Aluminum base alloys; Aluminum nitride; Applied sciences; Dispersion hardening metals; Elasticity. Plasticity; Exact sciences and technology; Infiltration; Materials science; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metals. Metallurgy; Particulate composites; Powder beds; Powder metallurgy. Composite materials; Production techniques; Tensile properties; Scanning electron microscopy; Strengthening; Metal matrix composite; Aluminium nitride; Tensile property; Aluminium alloy; X ray diffraction; Composite material; Dispersion strengthened metal; Tensile strength; Hardening; Transmission electron microscopy; Infiltration; Microstructure
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-006-0711-6

The tensile properties and microstructures of various Al alloys fabricated by the pressureless infiltration method under a nitrogen atmosphere were examined. The spontaneous infiltration of molten metal into the powder bed occurred at 800 °C for 1 h under a nitrogen atmosphere. As a result, it was possible to fabricate Al alloys reinforced with AlN particles formed by in situ reaction. A significant strengthening even in the control alloy occurred due to the formation of in situ AlN particle even without an addition of artificial reinforcement. Strength values of the control alloy were increased with decreasing Al powders in bottom powders bed. In addition, tensile strength in Al–Mg alloys was increased with Mg content.