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

ZrO2-toughened Al2O3 composites with better fracture and wear resistance properties

Ravikumar, K and Sarkar, Debasish and Basu, Bikramjit (2018) ZrO2-toughened Al2O3 composites with better fracture and wear resistance properties. In: JOURNAL OF BIOMATERIALS APPLICATIONS, 32 (9). pp. 1174-1186.

[img] PDF
Jou_bio_App_32-9_1174_2018.pdf - Published Version
Restricted to Registered users only

Download (1MB) | Request a copy
Official URL: http://dx.doi.org/10.1177/0885328217750820

Abstract

In view of the importance of the fracture resistance and wear properties on the performance and durability in a number of engineering applications, we have analysed such properties of sintered zirconia toughened alumina with varying zirconia content of 5 and 15 wt.%. Using micro-computed tomography, homogenous particulate distribution of zirconia is established through 3D volume rendering of the sintered pellet and by 2D orthoslice view. Depending on zirconia content and MgO addition (sintering additive), an interesting combination of strength and toughness properties was recorded with the investigated materials. While explaining the origin of cracking on worn surfaces of optimized zirconia toughened alumina, theoretical calculations revealed that the maximum tensile stress at the trailing edge of sliding contact is higher than critical damage stress. Such analysis incorporates the effect of factors such as the internal stresses due to thermal expansion anisotropy of non-cubic Al2O3 matrix, mismatch in elastic modulus/thermal expansion and athermal ZrO2 phase transformation.

Item Type: Journal Article
Additional Information: Copy right for this article belong to SAGE PUBLICATIONS LTD, 1 OLIVERS YARD, 55 CITY ROAD, LONDON EC1Y 1SP, ENGLAND
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Depositing User: Id for Latest eprints
Date Deposited: 04 May 2018 18:47
Last Modified: 04 May 2018 18:47
URI: http://eprints.iisc.ac.in/id/eprint/59752

Actions (login required)

View Item View Item