Microstructural and mechanical behavior of mechanical alloying intermetallic compounds between aluminum, magnesium and boron

摘要

In this paper, we employ a novel method of field activated and pressure assisted synthesis to prepare ultra-hard, super-abrasives from the elemental constituents (aluminum, magnesium and boron). Under the conditions in the present work, the simultaneous synthesis and consolidation of such intermetallic compounds can be achieved at 1500 °C with a pressure of 60 MPa. The prepared compounds show a hardness of 32.5 GPa, which is consistent with the hardness of AIMgB_(14) prepared by hot uniaxial pressing, and the average density was 2.62 g/cm3. Furthermore, it is found that such compounds are not produced from the elemental constituents in the present condition.