ELECTROCHEMICAL CHROMIUM(II) OXIDE COATINGS ON NONOXIDE CERAMIC SUBSTRATES

被引：16

作者：

CHAIM, R ^{[1
]}

ALMALEHROCKMAN, S ^{[1
]}

GALOR, L ^{[1
]}

机构：

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

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1994年 / 77卷 / 12期

关键词：

D O I：

10.1111/j.1151-2916.1994.tb04570.x

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：

SiC and TiB2 were electrochemically coated with Cr2O3 from a 0.1M aqueous solution of chromium nitrate hydrate with ethanol additives. On both substrate materials polycrystalline Cr2O3 was formed at current densities from 5 to 50 mA/cm(2) and deposition durations of 5 to 30 min. The coating weight increased with current density and with deposition time. The as-deposited coatings contained microcracks due to drying shrinkage. Microstructural observations indicate that sintering of the Cr2O3 coatings on TiB2 at 1100 degrees C for 1 h in a reducing atmosphere in a closed graphite crucible causes the densification of the coating via a liquid phase, which forms by oxidation of TiB2. Under similar conditions, the Cr2O3 coatings on SiC may be sintered via an evaporation-condensation mechanism.

引用

页码：3202 / 3208

页数：7

共 36 条

[1] YBACUO SUPERCONDUCTOR THIN-FILMS VIA AN ELECTRODEPOSITION PROCESS [J].