Effects of Compacting Pressure and Sintering Temperature on the Properties of Highly Porous Pure Aluminum Produced with Boric Acid (H 3 BO 3 )

摘要: In this study, highly porous pure aluminum material with cellular structure was fabricated via powder metallurgy route using a space holding technique the addition of boric acid powders as pore-forming agents. Boron products, namely, acid, were used novel Aluminum high porosity ~50% successfully produced. The experiments focused on investigating effects such parameters compaction pressure and sintering temperature final properties samples by determining their optimum values. Quasistatic compressive behaviors obtained materials examined at strain rate 10–3 sec–1. results show that most suitable states for cold-pressed under 630 MPa sintered 620°C 3 hours. According to stress-strain behavior high-porous states, there is plateau region nearly constant flow stress large about 70%. densities these approximately 1.0 g/cm3, mean cell sizes amounted 0.6 mm. Using (H3BO3) differs from conventional processes in terms superior comprehensive mechanical static strength energy absorption 18 MPa, 12 MJ/m3, respectively.