A new approach to interpreting the parabolic and non-parabolic oxidation behaviour of hot-pressed β-SiAlON ceramics

被引：16

作者：

Hou, Xinmei ^{[1
]}

Lu, Xuan ^{[1
]}

Peng, Ben ^{[2
]}

Zhao, Baojun ^{[3
]}

Zhang, Mei ^{[1
]}

Chou, Kuo-Chih ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met, Beijing 100083, Peoples R China

[2] Met Corp China Ltd, Beijing 100038, Peoples R China

[3] Univ Queensland, Sch Chem Engn, Pyromet Res Ctr, Brisbane, Qld 4072, Australia

来源：

CORROSION SCIENCE | 2012年 / 58卷

基金：

美国国家科学基金会;

关键词：

Ceramics; Modelling studies; Oxidation; SIO2-SI3N4; INTERFACE; SILICON-NITRIDE; KINETIC-MODEL; CORROSION;

D O I：

10.1016/j.corsci.2012.02.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation behaviour of hot-pressed beta-SiAlON ceramics with different densities has been investigated up to 1853 K in air using thermogravimetry (TG). The microstructures of the oxidised samples were determined by scanning electron microscopy (SEM), and the phases after oxidation were confirmed by X-ray diffraction (XRD). The oxidation kinetics of the higher density sample was diffusion controlled. For the lower density sample, it was controlled by both an interface reaction and diffusion in the early stage but diffusion controlled after a certain time. The oxidation curves can be well described by Chou's model with the "characteristic oxidation time" index introduced. (c) 2012 Elsevier Ltd. All rights reserved.

引用

页码：278 / 283

页数：6

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