Sol-gel preparation and thermo-mechanical properties of porous xAl2O3-ySiO2 coatings on SiC Hi-Nicalon fibres

被引：27

作者：

Verdenelli, M ^{[1
]}

Parola, S ^{[1
]}

Chassagneux, F ^{[1
]}

Létoffé, JM ^{[1
]}

Vincent, H ^{[1
]}

Scharff, JP ^{[1
]}

Bouix, J ^{[1
]}

机构：

[1] Univ Lyon 1, Lab Multimat & Interfaces, UMR CNRS 5615, F-69622 Villeurbanne, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2003年 / 23卷 / 08期

关键词：

Al2O3; composites; porosity; SiC fibres; sol-gel processes; SiO2;

D O I：

10.1016/S0955-2219(02)00296-0

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：

Porous thin films of mixed aluminium silica oxides were elaborated by the sol-gel process from aluminium tri-sec-butoxide and tetraethylorthosilicate on Hi-Nicalon fibres. The porosity was generated by addition of a surfactant, namely cetyltrimethylammonium bromide (CTAB). SiC Hi-Nicalon fibres were coated by the dip-coating technique. After annealing in air (500-1200 degreesC) crack-free coatings were observed, with a thickness in the range 100-1000 nm. The fibres were tensile tested and results were analysed by the Weibull statistic. They showed good mechanical properties compared to the commercial fibres. The systems were characterized by thermal gravimetry, differential scanning calorimetry, X-ray diffraction, BET and scanning electron microscopy. The powders obtained in the same conditions as the coatings were highly porous with surface areas in the range 540-150 m(2)/ g depending on the annealing temperature (400-1000 degreesC). (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：1207 / 1213

页数：7

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