Isothermal Sections of the Al2O3–HfO2–Er2O3 Phase Diagram at 1250 and 1600 ºС

   
L.Lopato
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2012, #09/10
http://www.materials.kiev.ua/article/1092

Abstract

The isothermal sections at 1250 and 1600 ºС for the Al2O3–HfO2–Er2O3 phase diagram are constructed for the first time. Phase equilibria are established at these temperatures; they are determined by the most thermodynamically stable compound, HfO2. No ternary compounds or appreciable solid-solution regions based on components or binary compounds are found in the ternary system. The presence of AL + F, Er3A5 + F, ErA + F, and Er2A + F two-phase regions in the isothermal section at 1650 ºС suggests that they contain triangulating sections of the Al2O3–HfO2–Er2O3 ternary system.


ALUMINA, CERAMIC HFO2, CERAMICS, ERBIUM OXIDE, EUTECTIC MATERIALS, INTERACTION, ISOTHERMAL SECTION, STATE DIAGRAM