ELECTROCHEMICAL ZRO2 AND AL2O3 COATINGS ON SIC SUBSTRATES

被引：47

作者：

CHAIM, R ^{[1
]}

STARK, G ^{[1
]}

GALOR, L ^{[1
]}

BESTGEN, H ^{[1
]}

机构：

[1] HOECHST AG,KERAM FORSCH,FRANKFURT 80,GERMANY

来源：

JOURNAL OF MATERIALS SCIENCE | 1994年 / 29卷 / 23期

关键词：

D O I：

10.1007/BF00354566

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

SiC was electrochemically coated with ZrO2 and with Al2O3 from 0.1 M aqueous solutions of metal-nitrate-hydrates with ethanol added. Amorphous zirconia and alumina coatings were formed with current densities from 10 to 70 mA cm(-2), and deposition durations of 1-60 min. The as-deposited coatings contained microcracks caused by drying shrinkage. Sintering of zirconia at 900 degrees C for 1 h and of alumina at 1200 degrees C for 2 h in air was accompanied by crystallization to a mixture of tetragonal and monoclinic phases in the former and to alpha-alumina in the latter. The absence of intermediate phases between the coatings and the substrates and the good adherence of the sintered coatings indicate the high-temperature stability of these coatings.

引用

页码：6241 / 6248

页数：8

共 25 条

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[2]

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