Skip to main content

Structural Evolution of TiO2 Precipitates in Ti-DopedSapphire (α-Al2O3)

Buy Article:

$51.00 plus tax (Refund Policy)


A time-dependent phase stability diagram has been developed describing the structural evolution of TiO2 precipitates in Ti-doped sapphire (α-Al2O3). A high-pressure TiO2 phase with the α-PbO2 structure (α-TiO2) forms as a coherent precipitate in Ti-doped sapphire annealed at 1200°–1300°C; extended annealing times at these temperatures result in twinned particles, the twinning minimizing the precipitate–matrix misfit strain energy. Twinned α-TiO2 eventually transforms to the rutile structure, coincident with the loss of coherency with the sapphire matrix. Rutile nucleates directly in sapphire annealed at temperatures at 1350°C and above. Rutile is present mainly as semicoherent and twinned precipitates, the twinning occurring relatively early in the precipitation sequence.

Document Type: Research Article


Affiliations: Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106

Publication date: April 1, 2011


Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more