Production of Boron Carbide Reinforced 2024 Aluminum Matrix Composites by Mechanical Alloying

Abstract

Boron carbide particulates reinforced 2024 Aluminum matrix composites were fabricated by mechanical alloying-hot extrusion technology successfully. The morphology and microstructure of B 4 C p /2024Al composite were investigated by optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). A clean interface of B 4 C between aluminum was obtained in this experiment, and matrix alloy revealed the typical microstructure of high energy milling with average grain size about 300 nm. Nanosized oxide and carbide formed after the composites subjected to high energy milling and hot consolidation process. The yield strength and Young's modulus values were improved significantly over the monolithic 2024 alloy.

Effect of mechanical and thermal loading on boron carbide particles reinforced Al-6061 alloy

“…Further, despite the above mentioned attributes, B 4 C p have not been preferred as reinforcements in Al matrix compared to other ceramic fillers such as Al 2 O 3 and SiC, probably due to higher cost of B 4 C particles compared to other two ceramic particles mentioned and poor wetting [15,20]. Accordingly, limited studies have been carried out with B 4 C as reinforcements ϱ in Al and its alloys to prepare both micro and nano composites as well as hybrid composites by various techniques and have been evaluated for physical, mechanical and tribological properties , while some are focused on the wettability and chemical reaction between aluminum and boron carbide [24], microstructure and interface of B 4 C P /Al composites fabricated by Boralyn process [25].…”

“…It has also been found that this alloy is one of the popular choices as matrix material in the preparation of MMCs due to its better formability [15] including for boron carbide particle (B 4 Cp) reinforced composites, although not much is reported for this system [15][16][17]. B 4 Cp, a robust material, exhibits attractive properties, such as low specific gravity, high hardness, high elastic modulus and excellent neutron absorption chemical and thermal stability, as well as corrosion resistance, [15,[18][19][20]. Also, it is the third hardest material after diamond and boron nitride with the hardness of 200VHN, which is higher than Al 2 O 3 and SiC.…”

WC-Co Particles Reinforced Aluminum Matrix by Conventional and Microwave Sintering

“…The PRAMCs have been usually produced via powder metallurgy and casting, while achieving a homogenous distribution of reinforcement in the base alloy in comparison with casting technique 1 . Low density, high conductivity and high toughness accompanied by a low price made aluminum as one of the best materials in some metal matrix composites in comparison with other light metals such as magnesium (Mg) 2 .…”

Processing and Performance Characteristics of Aluminum-Nano Boron Carbide Metal Matrix Nanocomposites

“…The fabrication of hybrid composites using ultrasonic cavitation approach was also reported in the literature [15]. Powder metallurgy and mechanical alloying routes were used to fabricate aluminum-boron carbide composites [16][17][18]. The impact and wear studies of Al/B 4 C conventional composites were reported in the literature [19].…”