摘要
利用SEM、EDS对钢基复合材料的界面形貌特征、界面物相组成及物相析出规律进行研究,并对界面化合物层的厚度进行了测量。在此基础上,分析了钢-铝固-固界面反应物相的形核及生长的演变模式,讨论了界面化合物物相Fe2Al5的生长的动力学机制。结果表明:铝硅合金覆层试样界面化合物层较纯铝覆层试样生长缓慢,化合物相生成与反应活化能值、反应速率常数有关;在723～873 K条件下,化合物层厚度与化合物反应活化能成反比,与反应速率常数成正比,最终获得了金属间化合物相生长动力学模型。
The interface morphology, phase composition, microstructure evolution and phase precipitation rule of steel-aluminum composite were analyzed by SEM and EDS. The thickness of intermetallic compounds layer was quantitatively characterized by OM, and the growth mechanism of phase formed during interracial reaction was discussed. The results show that primary phase forming during interfacial reaction is FeEAls. The interracial reaction is restrained after silicon micro-alloying. The kinetics analysis indicate that the formation of intermetallic compounds are related with the activation energy and the content of reaction. The thickness of the intermetallic compounds layer is inversely proportional to the activation energy and amount of the content of reaction.
出处
《热加工工艺》
CSCD
北大核心
2013年第12期123-126,共4页
Hot Working Technology
关键词
界面反应区
金属间化合物
扩散
动力学
interfacial reaction zone
intermetallic compounds
diffusion
dynamics
