ChemInform Abstract: PHASE EQUILIBRIUMS AND ORDERING IN THE SYSTEM ZIRCONIA‐YTTRIA

Abstract

Das Phasendiagramm des Titelsystems wird neubestimmt.

Processing and Characterization of Yttria-Stabilized Zirconia Foams for High-Temperature Applications

“…In the case of 8YSZ ( Figure 5(b)), the formulation with 77.5% solids and 4.5% binder was selected. The maximum amount of solids is naturally desired [3,14,27,30]. In Figure 5 the thixotropy curves present different behaviors.…”

“…The steeper the curve, the higher the viscosity at high shear stress and consequently the higher the initial viscosity [15]. Those characteristics provide a thicker layer when coating and, consequently, higher homogeneity and better densification of the material [14].…”

“…Figure 6(c) corresponds to a double-coated 3YSZ foam showing how the internal surfaces have more micropores and microcracks than the external walls. Moreover, the vertices are rounded after the recoating, which might enhance the mechanical strength of the structure [14]. Figure 6(d) shows typical defects, characteristic of the replica method.…”

“…The use of a second coating applied to the presintered foams has been reported as a way of enhancing the mechanical resistance due to the thickening of the struts. This procedure hinders microstructural defects that are left in the walls of the ceramic foams during the burning out of the organic components [14][15][16].…”