Research on the Oxidation Mechanism of Vermicular Graphite Cast Iron

被引：14

作者：

Guo, Qiaoqin ^{[1
]}

Yang, Zhong ^{[1
]}

Guo, Ding ^{[2
]}

Tao, Dong ^{[1
]}

Guo, Yongchun ^{[1
]}

Li, Jianping ^{[1
]}

Bai, Yaping ^{[1
]}

机构：

[1] Xian Technol Univ, Sch Mat & Chem Engn, Xian 710032, Shaanxi, Peoples R China

[2] Xian Capital Water Ltd Co, Xian 710086, Shaanxi, Peoples R China

来源：

MATERIALS | 2019年 / 12卷 / 19期

基金：

中国国家自然科学基金;

关键词：

oxidation mechanism; vermicular graphite iron; oxidation channel; graphite; scanning electron microscope (SEM); HIGH-TEMPERATURE OXIDATION; THERMAL BARRIER COATINGS; RESISTANCE; SURFACE; ALLOY; LAYER; MICROSTRUCTURE; GROWTH; OXIDE; WEAR;

D O I：

10.3390/ma12193130

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The oxidation mechanism of vermicular graphite cast iron was studied. The oxidation reaction starts from graphites and diffused slowly. Graphites in vermicular graphite are interconnected, coral-like clusters, providing the main oxidation core and channel. The worm-like graphites on the surface are mostly oxidized and form oxide affected zones. The oxide films are composed of a loose oxide layer with the phases of Fe3O4, Fe2O3, and FeO, and a dense passivation layer with FeO and Fe2SiO4. After oxidation, pearlites in the vermicular graphite cast iron are decomposed into ferrite and cementite at high temperatures.

引用

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