Alumina Whisker Growth on a Single-Crystal Alumina Substrate
- 1 March 1962
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 33 (3) , 826-827
- https://doi.org/10.1063/1.1777173
Abstract
Alumina whiskers have been grown on single‐crystal alumina substrates by heating aluminum filings, located near the crystals, to 1400°C in a stream of wet hydrogen. The whiskers grew crystallographically coherent with the substrate, and had their axes either parallel to the c axis or in one of 12 equally spaced directions in the basal plane. These 12 directions divide into two distinct sets, a 〈112̄0〉 set and a 〈11̄00〉 set, each having sixfold symmetry, and with the directions of one set midway between the directions of the other. These growth directions are the screw‐dislocation directions in alumina, hence it seems plausible that the whiskers grew coherently with the substrate at the site of emergent screw dislocations.This publication has 4 references indexed in Scilit:
- Nucleation of Alumina at High Supersaturations and Subsequent RecrystallizationThe Journal of Chemical Physics, 1960
- Growth and Defect Structure of Sapphire MicrocrystalsJournal of Applied Physics, 1957
- Mercury WhiskersActa Metallurgica, 1953
- Capillary equilibria of dislocated crystalsActa Crystallographica, 1951