Research on Carbon-Free Al-Al₂O₃ Composite Sliding Gate Performance

Abstract

The Al-Al2O3 specimens of the carbon-free sliding gate are made from sintered corundum, white fused corundum, activated alumina powder and aluminum. The Al contents of the metal Al-Al2O3 composite sliding gate are 3%, 6%, 9%, 12% and 15% respectively. The specimens are treated with three different processes (200°C drying, Nitriding and CO atmosphere). The results show that, the specimen of Nitriding has the best performance. Especially, the specimen, whose Al content is 9% and is treated with Nitriding, has relative lower apparent porosity, higher cold crushing strength and hot modulus of rupture, which makes it posses the superior combination property.