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.
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页数：8
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