Potential ultra hard phases of ZrO2-HfO2 solid-solutions, derived from high P-T conditions

DSpace/Manakin Repository

Show simple item record

dc.contributor.author Jackson, Neil
dc.date.accessioned 2011-03-28T12:59:25Z
dc.date.available 2011-03-28T12:59:25Z
dc.date.issued 2011-03-28
dc.identifier.uri http://hdl.handle.net/10539/9252
dc.description.abstract The Merrill-Bassett gem anvil cell with a newly developed anvil polishing technique and the CO2 laser heated diamond anvil cell was used to search for possible ultra hard phases of the unstabalized ZrxHf1􀀀xO2 (x=0.5) solid-solution. 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. Thus the potential for the Zr0:5Hf0:5O2 solid-solution as a candidate for an ultra-hard ultra-tough \superceramic" was confirmed. en_US
dc.language.iso en en_US
dc.title Potential ultra hard phases of ZrO2-HfO2 solid-solutions, derived from high P-T conditions en_US
dc.type Thesis en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search WIReDSpace


Browse

My Account

Statistics