Oxidation behavior of Hi-Nicalon SiC monofilament fibres in air and O2-H2O-Ar atmospheres

被引：53

作者：

Yao, Rongqian

Feng, Zude ^{[1
]}

Chen, Lifu

Zhang, Ying

Zhang, Bingjie

机构：

[1] Xiamen Univ, Dept Mat Sci & Engn, Coll Mat, Xiamen 361005, Peoples R China

来源：

CORROSION SCIENCE | 2012年 / 57卷

关键词：

Ceramic; SEM; XRD; Oxidation; Passive films; Interfaces; SILICON-CARBIDE FIBER; THERMAL-STABILITY; TENSILE-STRENGTH; WET OXIDATION; WATER-VAPOR; OXYGEN; KINETICS; TEMPERATURE; COMPOSITES;

D O I：

10.1016/j.corsci.2011.12.019

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An equipment including aircraft engine simulated environmental system and sample loading stage was manufactured for annealing Hi-Nicalon monofilament fibres in corrosive environments. The fibres were exposed in air and 14% H2O/8% O-2/78% Ar atmospheres at 1200 degrees C for 1-100 h, respectively. Experimental results indicate that tensile strength decreases, whereas oxide layer thickness and grain size of SiO2 increase with rising annealing time. The specimens show brittle/flat fracture, most of cracks initiate at the interface between SiC and SiO2 region of fibres. The control effect of water vapor on formation and structural evolution of the passive film was discussed. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：182 / 191

页数：10

共 32 条

[1] OXIDATION OF SILICON-CARBIDE IN OXYGEN AND IN WATER-VAPOR AT 1500-DEGREES-C [J].