Tensile properties and microstructures of Al composite reinforced with BN particles

Structural evolution of Al/BN mixture during mechanical alloying

“…Hexagonal boron nitride (h-BN), which exhibits comprehensive properties [5][6] of low density, excellent stability, high thermal conductivity, good lubricity and so on, is a promising reinforcement in aluminum metal matrix composites (AMMCs) for automotive and aerospace industrial applications [7]. In recent years, many researchers have paid much attention to the fabrication of AMMCs reinforced by BN, including by high-energy ball milling [8], pressureless infiltration [9][10] and other methods. MA process is generally involved in all these methods in the early stage of the fabrication.…”

Light Metal Matrix Composites

“…However, in the Al-B 4 C composite, two secondary phases consisting of carbon, aluminum, and boron were observed which based on the fracture studies give rise to a strong interface due to effective interfacial bonding. Investigation on squeeze cast Al-Mg-BN-reinforced composites showed the formation of interfacial AlB 2 phase and in situ AlN phase which resulted in significant grain refinement (Lee et al 2002). The interfacial reaction products of the Al/B 4 C p composite fabricated by the pressureless infiltration method were analyzed by Lee et al (2001) using XRD, SEM, EDS, AES, and TEM.…”

The Effect of Ti Addition on the Microstructure and Fracture Toughness of Bn-Al Composite Materials Synthesized by Vacuum Infiltration

“…This confirms that the addition of the [Ti+BN] preform simultaneously into molten Al leads to reaction (2). [17] Al(l) + BN(s) → αAlB 12 (s) + B(inAl) + AlN(s)atT > 985…”