Yttrium silicate coating system for oxidation protection of C/C-Si-SiC composites: Electrophoretic deposition and oxygen self-diffusion measurements

被引：44

作者：

Argirusis, Chr. ^{[1
]}

Damjanovic, T. ^{[1
]}

Borchardt, G. ^{[1
]}

机构：

[1] Tech Univ Clausthal, Inst Met, D-38678 Clausthal Zellerfeld, Germany

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 2-3期

关键词：

yttrium silicate; powders-chemical preparation; composites;

D O I：

10.1016/j.jeurceramsoc.2006.05.026

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 [材料科学与工程]; 080502 [材料学];

摘要：

Yttrium silicate (YSI) coatings are promising complements to SiC coatings for protecting C/C-Si-SiC composites against oxidation owing to the pronounced chemical and mechanical properties of this material (low Young's modulus, low thermal expansion coefficient, low evaporation rate and oxygen permeability, good erosion resistance). Under control of deposition voltage and duration, yttrium silicate coatings of various thicknesses were electrophoretically deposited from powder suspensions. The protectiveness of these coatings was tested by means of thermogravimetric analysis in air. Diffusion data for oxygen in yttrium silicate needed to correlate the experimentally obtained oxidation rates in a phenomenological model were obtained by the IEDP (isotope exchange depth profiling) method from tracer diffusion measurements in single crystalline yttrium silicate and compared to diffusion data in mullite. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1303 / 1306

页数：4

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