Structural and compositional analyses of oxidised layers of ZrB2-based UHTCs

被引：40

作者：

Jayaseelan, D. D. ^{[1
]}

Zapata-Solvas, E. ^{[1
]}

Chater, R. J. ^{[1
]}

Lee, W. E. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, Ctr Adv Struct Ceram, London SW7 2AZ, England

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2015年 / 35卷 / 15期

基金：

英国工程与自然科学研究理事会;

关键词：

UHTC; Oxidation; FIB-SIMS; TEM; Characterisation; DIBORIDE-SILICON-CARBIDE; HIGH TEMPERATURE CERAMICS; ZIRCONIUM DIBORIDE; MECHANICAL-PROPERTIES; OXIDATION-RESISTANCE; ZRB2-SIC COMPOSITES; OXIDE-FILMS; MICROSTRUCTURE; CONVECTION; EVOLUTION;

D O I：

10.1016/j.jeurceramsoc.2015.07.026

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

ZrB2 based UHTCs (ZrB2/20 vol.% SiC) with rare earth additions (La2O3, LaB6 and Gd2O3) were oxidised for 1 hat 1600 degrees C and the oxidised layers analysed by FIB-SIMS and TEM techniques. Rare earth elements added to ZrB2/20 vol.% SiC led on oxidation to formation of a thick (up to similar to 350 mu m) protective oxide layer. Detailed cross-sectional analyses of oxidised layers revealed that they comprised of mixed crystalline and amorphous phases: m-ZrO2 and zirconates were formed on the oxidised surfaces in all samples as well as evidence of immiscible liquid. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：4059 / 4071

页数：13