TWIN-ROLLER QUENCHING OF BI2SR2CA2CU3O10 MELTS

Citation
A. Schmidtzumberge et al., TWIN-ROLLER QUENCHING OF BI2SR2CA2CU3O10 MELTS, Glastechnische Berichte, 66(3), 1993, pp. 56-60
Citations number
16
Categorie Soggetti
Material Science, Ceramics
Journal title
ISSN journal
00171085
Volume
66
Issue
3
Year of publication
1993
Pages
56 - 60
Database
ISI
SICI code
0017-1085(1993)66:3<56:TQOBM>2.0.ZU;2-L
Abstract
Melts of the target composition Bi2Sr2Ca2Cu3O10 were produced and quen ched in a specially designed twin-roller device. Quenching rates were estimated to be between about 0.2 . 10(6) and 2 . 10(6) K . s-1. In al l quenching experiments mainly three sample shapes resulted, thin sliv ers, fibers, and clusters ot sticking droplets. Slivers and fibers pro ved to be glassy, whereas the bulk of the clusters was crystalline. Th e slivers showed surface features due to nonuniform solidification pro cesses. Thus wavy regions could be found or the surfaces were layered because of a rupturing during quenching. It could further be shown tha t an Al2O3 content of the melts does have some influence on the glass formation.