The corrosion behavior of various CVD SiC coatings in molten silicon

被引：6

作者：

Berdoyes, I. ^{[1
]}

Plaisantin, H. ^{[1
,2
]}

Danet, J. ^{[1
]}

Lepetitcorps, Y. ^{[1
]}

Roger, J. ^{[1
]}

机构：

[1] Univ Bordeaux, Lab Compos Thermostructuraux, Safran Ceram, CNRS,CEA, 3 Allee Boetie, F-33600 Pessac, France

[2] Safran Ceram, 105 Ave Marcel Dassault, F-33700 Merignac, France

来源：

CERAMICS INTERNATIONAL | 2024年 / 50卷 / 02期

关键词：

B; Composites; B. Electron microscopy; C; Corrosion; D; SiC; MATRIX COMPOSITES; CARBIDE; MICROSTRUCTURE; MECHANISMS; HYDROGEN;

D O I：

10.1016/j.ceramint.2023.11.147

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：

Corrosion by molten silicon of different SiC CVD coatings has been investigated at 1450 degrees C and 1550 degrees C by analyzing the deteriorated zone with electron microscopies. The influence of the microstructure on the corrosion mode is finely considered. The most resistant material consists of wide and aligned <111> oriented columns, perpendicular to the substrate, corresponding to an arrangement of dense {111} planes parallel to the surface in contact with the molten silicon. Structural disorder (grain boundaries, structural defects) and disorientations (growth direction other than <111>, secondary growth, column misalignment) make the CVD SiC coating more vulnerable to corrosion.

引用

页码：3877 / 3886

页数：10

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