The oxidation of TiB2 ceramics containing Cr and Fe

被引：40

作者：

Lee, DB ^{[1
]}

Lee, YC ^{[1
]}

Kim, DJ ^{[1
]}

机构：

[1] Sungkyunkwan Univ, Sch Met & Mat Engn, Suwon 440746, South Korea

来源：

OXIDATION OF METALS | 2001年 / 56卷 / 1-2期

关键词：

TiB2; chromium; iron; oxidation; TiO2; B2O3;

D O I：

10.1023/A:1010369526960

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The oxidation behavior of TiB2, TiB2-0.5 wt.% Cr-0.5 wt.%Fe and TiB2-1 wt.% Cr-1 wt. % Fe was studied at 800, 900, and 1000 degreesC in static air. These ceramics oxidized rather rapidly and formed thick oxide scales. The oxidation rates of TiB2-base ceramics were comparable to TiO2 formation on pure titanium. The scale formed on TiB2 consisted of TiO2 and B2O3 Far TiB-Cr-Fe ceramics, a small amount of Cr- and Fe-oxides was additionally formed. B2O3 for med during oxidation tended to evaporate because of its high vapor pressure, making oxide scales porous and fragile. The oxidation of the TiB2-base ceramics appeared to be governed by the inward transport of oxygen via the highly porous oxide scale. The oxidation resistance of TiB2-Cr-Fe ceramics was similar to or better than that of TiB2.

引用

页码：177 / 189

页数：13

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