Potential ultra hard phases of ZrO2-HfO2 solid-solutions, derived from high P-T conditions
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Date
2011-03-28
Authors
Jackson, Neil
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Abstract
The pressure-temperature phase diagram of this compound was explored for the rst
time using angle dispersive x-ray di raction. The pressure-temperature behaviour
of this solid-solution was then compared to the di raction data of the end members
ZrO2 and HfO2. The investigative techniques of Raman spectroscopy and x-ray
di raction were used to clarify previous Raman spectroscopy studies. The structural
changes from the sevenfold coordinated monoclinic to orthorhombic-I to the
ninefold orthorhombic-II (cotunnite) structure under high pressure-temperature conditions
were confirmed.