Volume 28, Issue 1 (Jun 2009)                   jame 2009, 28(1): 61-74 | Back to browse issues page

XML Persian Abstract Print

Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

M. Kasiri Asgarani, A. Saidi, M. H. Abbasi. Chlorination of Ball-milled Zirconia. jame 2009; 28 (1) :61-74
URL: http://jame.iut.ac.ir/article-1-504-en.html
Department of Materials Engineering, Isfahan University of Technology , kasiri@ma.iut.ac.ir
Abstract:   (6253 Views)
The effects of mechanochemical treatment of monoclinic zirconia in high energy planetary ball mill on its phase transformation were investigated. The mechanical treatment in ball mill reduces the grain size, increases microstrain, and causes phase transition to metastable nanostructured tetragonal and cubic phases. XRD and TEM results show considerable amounts of amorphous phase during ball milling. Surface area measurements by BET method over long milling times reveal that ZrO2 particles are agglomerated with an amorphous phase as a binder. The mechanical treatment increases the reactivity of zirconia in chlorine gas. Annealing of ball milled zirconia in the chlorine atmosphere produces oxygen vacancy in zirconia (ZrO2-x) and causes the amorphous phase to be crystallized and to change into cubic and tetragonal phases. The chlorine atmosphere increases the stability temperatures of cubic and tetragonal phases to 800°C and 1000°C, respectively. In this situation, the energy of grain boundary and oxygen vacancy play important roles in the stability of tetragonal and cubic phases.
Full-Text [PDF 1308 kb]   (1236 Downloads)    
Type of Study: Research | Subject: General
Received: 2015/02/9 | Accepted: 2015/05/5 | Published: 2015/05/5

Add your comments about this article : Your username or Email:

Send email to the article author

Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

© 2022 CC BY-NC 4.0 | Journal of Advanced Materials in Engineering (Esteghlal)

Designed & Developed by : Yektaweb