General Electric Company
COMPOSITION FOR THERMAL BARRIER COATING

Abstract:

A thermal barrier coating composition comprises: A. a binder in an amount from about 1% wt. % to about 15 wt. % and: B. a zirconia-containing powder comprising: I. up to about 65 wt. % of a component comprising: a. a first metal oxide selected from the group including ytterbia, neodymia, mixtures of ytterbia and neodymia, mixtures of ytterbia and lanthana, mixtures of neodymia and lanthana, and mixtures of ytterbia, neodymia and lanthana in an amount of from about 8 wt. % to about 55 wt. % of the component; and b. a second metal oxide selected from the group including yttria, calcia, ceria, scandia, magnesia, india and mixtures thereof in an amount up to about 2 wt. % or less of the component; and II. one or more of a third metal oxide selected from the group including: a. hafnia in an amount up to about 2 wt. % or less of the component; and b. tantala in an amount up to about 2 wt. % or less of the component; and and a balance zirconia by weight.