Influence of Extrusion Temperature on Microstructures and Mechanical Properties of Bi_2O_3-coated Al_(18)B_4O_(33) Whisker Reinforced Al Composites

摘要

Extrusion experiments have been carried out on Bi_2O_3-coated Al_(18)B_4O_(33) whisker reinforced aluminum matrix composite. The effects of the extrusion temperature on the microstructures, the formability and the mechanical properties of ABOw reinforced aluminum (ABOw/Al) composites with and without Bi_2O_3 coating were investigated. The results show that the steady-state extrusion load and the probability of whisker fracture of the extruded two composites decrease with the extrusion temperature increasing. The mechanical properties of the composites attain highest values at extrusion temperature of 673K.