ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

On the orientation relationships in phase transformation of CaTiO3

Pramanik, Sudipta and Ravikumar, K and Kalsar, Rajib and Suwas, Satyam and Basu, Bikramjit (2019) On the orientation relationships in phase transformation of CaTiO3. In: CERAMICS INTERNATIONAL, 45 (9). pp. 12509-12515.

[img] PDF
Jou_Cer_Int_45_9_12509-12515.pdf - Published Version
Restricted to Registered users only

Download (1MB) | Request a copy
Official URL: https://doi.org/10.1016/j.ceramint.2019.03.186


Electron Backscattering Diffraction (EBSD) is a well-known technique which is primarily used to analyse the microstructural features in metallic materials, including the orientation relationship between microstructural constituents. However, its versatility has not yet been critically utilized to establish crystallographic relationships involved in phase transformation of ceramics. In view of the significance of transformation twinning in ceramics on mechanical properties, the representative orientation relationships in twinned grains of CaTiO3 is investigated using EBSD. It is observed that the matrix/twin pairs of CaTiO3 have misorientation angles at 87 degrees, 90 degrees and 98 degrees. The misorientations associated with the boundaries between twin/twin pairs formed by different twinning orientation relationships are noted at 90 degrees, 91 degrees, 92 degrees and 98 degrees. On the basis of the orientation relationships, the crystallography of cubic to orthorhombic and tetragonal to orthorhombic phase transformations in CaTiO3 is explored. The most favorable orientation relationships pertaining to such a phase transformation are (001)(0)100](0)parallel to(03 (1) over bar)(c)(3) over bar 13](c) between parent cubic and daughter orthorhombic phases and (001)(0)100](0)parallel to(1 (1) over bar(2) over bar)(t)(8) over bar(2) over bar(3) over bar](t) between parent tetragonal and daughter orthorhombic phases of CaTiO3.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to ELSEVIER SCI LTD
Keywords: Calcium titanate; Electron backscattering diffraction (EBSD); Crystallography; Orientation relationship; Twinning; Phase transformation
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 24 May 2019 10:32
Last Modified: 24 May 2019 10:32
URI: http://eprints.iisc.ac.in/id/eprint/62709

Actions (login required)

View Item View Item