On the peculiarities of phase developments involving Zn2 +-doped ZrO2 system. (September 2017)

• Record Type: Journal Article
• Authors: Kumar, Kundan; Jaroń, Tomasz; Chowdhury, Anirban
• Is Part Of: Scripta materialia. Number 138(2017)
• Page Start: 71
• Page End: 74
• Publication Date: 2017-09
• Subjects: Oxides -- Polymorphic phase transformation -- X-ray diffraction (XRD) -- Raman spectroscopy -- Thermogravimetric analysis; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.05.040
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: ZnO-stabilized (8%) ZrO2 system appeared cubic in normal X-ray diffraction (at 500 °C) but Rietveld analyses confirmed equiproportionate (~ 1:1) cubic and tetragonal phase. At 650 °C, the cubic to tetragonal phase ratio changed to 1:2 with the appearance of monoclinic phase (8 wt%). Kinetic studies with thermogravimetry data and other structural characterizations established the importance of the stabilizing cation (Zn 2 + ) for the ZrO2 matrix and confirmed that the conversion of the stabilized cubic/tetragonal phase to monoclinic ZrO2 is dependent pivotally on process kinetics (rate of heat supply), thermodynamics (absolute final temperature) and the presence/lack of oxygen in the ambience. Graphical abstract: