Abstract
The phase equilibria on the solidus surface of the phase diagram of the HfO2−Y2O3−La2O3 system have been investigated using DTA in helium up to 2500°C, TA with solar energy in air up to 3000°C, X-ray phase analysis, petrography, and electron microscopy. Five solid solution fields based on hexagonal (H) and cubic (C) crystal modifications of Y2O3, cubic modifications of HfO2 with fluorite structure (F), high-temperature cubic modifications of La2O3 (X), and crystallization field of the ordered phase La2Hf2O7 with the pyrochlorine (Py) type structure have been found on the solidus surface. The ternary system has three quaternary novariant equilibria of the eutectic (1) and peritectic (2) type.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
