Aluminium alloy—rice husk ash particle composites

Review on the physicochemical treatments of rice husk for production of advanced materials

“…For instance, in the original work by Das et al [83] rice husk ash was used as a reinforcing phase in aluminum-silicon alloys to investigate the effects of second phases on the alloy solidification behavior. A reactive infiltration processing of SiC/Fe-Si composites using preforms made of coked rice husks and SiC powder in different proportions is reported by Zhu et al, in which the FeSi 2 alloy was used as the infiltrating liquid material.The incorporation of SiC was conducted in order to improve the wetting and infiltration of the preforms by the alloyed Fe-Si and thus engineer the mechanical properties of the composites.…”

“…It is also expected that the SiC whiskers and particles in the preforms will remain intact and will preserve their properties in the composites.It is intended that by the reaction with Si, the addition of Mo gives place to MoSi 2 formation, which would be advantageous to the overall properties of the composites. This is because MoSi 2 is a less brittle phase compared with Si and has a high melting point (2030 ºC), thus favoring the high-temperature performance of the composite [88].A summary of different fabrication routes and types of ceramicand metal-matrix composites, starting from rice husk is presented in Table 3 [83][84][85][89][90][91][92][93][94][95][96][97][98][99][100][101][102][103][104][105][106].…”

Synthesis Characterization and Mechanical Behavior of Rice Husk Ash Reinforced Al-20mg 10 Cu Alloy Matrix Hybrid Composites

“…After sufficient manual mixing was done, the composite slurry was re-heated (700 0 c) to a fully liquid state and then automatic mechanical mixing was carried out for about 20 minutes at an average stirring rate of 150 rpm. The temperature of the furnace was gradually reduced to intervals of 450 0 c The top layer was skimmed and metal was cast into 120 mm x 10 mm cylindrical finger molds [11].…”

Metal matrix composite fabrication methods

“…This process consists in intensive mixing of solid partides into the aluminium melt. In compocasting, activation of the system and disruption of inert barriers between the components takes place during forced displacement of particles inside the melt, which results in the wetting of the particles and their assimilation by the CM matrix [19,20].…”

“…The main credit for developing this process belongs to a group of scientists headed by P.K. Rohatgi [19]. The process involves the addition of powder grains to the melt, which is accomplished through intensive mixing.…”