Title :
Permanence of Zirconia Stability, A Function of Purity
Author :
Smoot, Thomas W. ; King, Donald F.
Author_Institution :
Research Department, Harbison-Walker Refractories Company
Abstract :
The stability permanence of calcia-stabilized zirconia was studied during the course of repeated heat treatments. Zirconias with various degrees of purity and initial stability were tested. X-ray diffraction and thermal expansion measurements were used to determine stability changes. Standard purity samples were partially destabilized by cyclic heating through the temperature of monoclinic-tetragonal phase change (between 954°C and 1260° C), while very high purity samples withstood this and even more severe heat tests.
Keywords :
Chemicals; Heat treatment; Impurities; Magnesium compounds; Stability; Temperature distribution; Testing; Thermal expansion; X-ray diffraction; Zirconium;
Journal_Title :
Aerospace, IEEE Transactions on
DOI :
10.1109/TA.1963.4319493
