X-ray diffraction evidence of a phase transformation in zirconia by the presence of graphite and carbon nanotubes in zirconia toughened alumina composites

被引：14

作者：

Bocanegra-Bernal, M. H.

Reyes-Rojas, A.

Aguilar-Elguezabal, A.

Torres-Moye, E.

Echeberria, J. ^{[1
,2
]}

机构：

[1] Univ Navarra, TECNUN, San Sebastian 20018, Spain

[2] Univ Navarra, CEIT, San Sebastian 20018, Spain

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2012年 / 35卷

关键词：

Zirconia toughened alumina; Carbon nanotubes; Graphite; Monoclinic phase transformation; Rietveld; TETRAGONAL ZIRCONIA; STABILITY; CERAMICS;

D O I：

10.1016/j.ijrmhm.2012.07.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have demonstrated by X-ray diffraction a transformation from the t-ZrO2 phase into the m-ZrO2 phase by the presence of multiwall carbon nanotubes (MWCNTs) and graphite powder (GP) in zirconia toughened alumina composites sintered in air. The phase transformation does not occur in sintering under an argon atmosphere. The quantitave phase analysis was carried out by fitting the X-ray diffraction profile with the Rietveld method making use of the FullProf software. The obtained amounts of m-ZrO2 phase by the presence of GP and MWCNTs were 5% and 2.2%, respectively, at a sintering temperature of 1520 degrees C for 1 h. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：315 / 318

页数：4

共 10 条

[1] A comparison of the effects of multi-wall and single-wall carbon nanotube additions on the properties of zirconia toughened alumina composites [J].