Issue 14, 2019, Issue in Progress

High-temperature stability of nanozirconate-toughed IMF material lanthanum synthesized by an in situ reaction

Abstract

Herein, powders composed of La2Zr2O7 (LZ) and ZrO2 phases were synthesized by an in situ reaction using a sol-spray pyrolysis method; moreover, 24 mol% LaO1.5–ZrO2 (volume ratio = 1 : 1) powders were characterized by XRD, Raman spectroscopy, SEM, and TEM. XRD and Raman results showed that the samples maintained a tetragonal ZrO2 and a pyrochlore LZ phase from 900 to 1100 °C. The addition of LZ could be helpful in the stabilization of t-ZrO2 and decreasing the grain size of ZrO2. The SEM results revealed that the LZ and ZrO2 phases were homogeneously distributed in the sintered bulk. The HRTEM results suggested that the crystal orientations of the nano-LZ and nano-ZrO2 phases were accordant; this was in agreement with the characteristics of the coherent boundaries. The fracture toughness of LZ–ZrO2 was markedly improved by the transformation toughening of the ZrO2 phase, and a value that was 2.2-fold that of the LZ prepared by a similar technique was achieved.

Graphical abstract: High-temperature stability of nanozirconate-toughed IMF material lanthanum synthesized by an in situ reaction

Article information

Article type
Paper
Submitted
19 Nov 2018
Accepted
31 Jan 2019
First published
06 Mar 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 7645-7651

High-temperature stability of nanozirconate-toughed IMF material lanthanum synthesized by an in situ reaction

X. Wang, M. Xue, S. Liu, K. Jiang and Z. Zhang, RSC Adv., 2019, 9, 7645 DOI: 10.1039/C8RA09501A

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements