| 主权项 |
1. An organic solvent based slurry composition for making an environmental barrier coating, the slurry composition comprising:
from about 6.8 wt % to about 96.1 wt % of a solvent; from about 3.9 wt % to about 93.2 wt % of a primary material, wherein the primary material is a primary transition material comprising a rare earth monosilicate; and from about 0.01 wt % to about 20 wt % of a slurry sintering aid, wherein the slurry sintering aid is a composition that:
dissolves in the primary material at a sintering temperature of the primary material;increases a rate of diffusion of the primary material during sintering such that surface area reduction occurs at lower temperatures than would occur in the absence of the slurry sintering aid; andforms with the primary material a doped primary material containing the primary material and at least one doping composition selected from the group consisting of iron, aluminum, titanium, gallium, nickel, boron, alkali metals, alkaline-earth metals, and Lnb rare earth metals; wherein the doped primary material is a doped rare earth monosilicate. |
