Structural transformations of alumina by high energy ball milling
- 1 November 1993
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 8 (11) , 2985-2992
- https://doi.org/10.1557/jmr.1993.2985
Abstract
Room temperature, high energy ball milling was applied to various transition aluminas (γ, K, χ), producing thermodynamically stable α-alumina–a phenomenon that could otherwise be achieved only by high temperature (1100–1200 °C) heat treatment. The transformation proceeds in two steps. The first one consists of rapid microstructural rearrangements with continuously increasing α-transformation rate. In the second step (1–2 h from the start), only relatively small changes in morphology are observed with a constant α-transformation rate. The rate is influenced only by the milling intensity. The presence or the absence of oxygen in the milling atmosphere has a large influence on the final surface area of α-alumina.Keywords
This publication has 7 references indexed in Scilit:
- Glass formation by mechanical alloyingPublished by Elsevier ,2003
- The fcc to hcp transition induced by mechanical deformations in the Ni–Ru systemJournal of Materials Research, 1992
- Mechanical alloying of brittle materialsMetallurgical Transactions A, 1988
- Studies on pore systems in catalysts XII. Pore distributions from the desorption branch of a nitrogen sorption isotherm in the case of cylindrical pores A. An analysis of the capillary evaporation processJournal of Catalysis, 1968
- Industrial CeramicsPublished by Springer Nature ,1963
- Transformations thermiques et hydrothermiques de l’alumineJournal de Chimie Physique et de Physico-Chimie Biologique, 1958
- The Effect of Hydrostatic Pressure on the Fracture of Brittle SubstancesJournal of Applied Physics, 1947