摘要
用扫描电镜、能谱分析和电子探针等方法研究了不同含氧量的铜/钢双金属棒扩散复合界面氧化物的形成及影响因素。结果表明:当铜中氧含量较少时,扩散复合中基本不形成氧化物。当铜中含氧量较高时,界面附近铜中形成弥散分布的氧化物颗粒;随扩散温度的升高和时间的延长,氧化物颗粒尺寸变大,分布区域变宽;界面剪切断裂时裂纹在氧化物处形成、扩展。从扫描电镜和电子探针结果中可以确定在铜/钢界面附近的氧化物为Fe2O3并从热力学角度分析了氧化物的形成原因。
The formation and influence factors of oxide near the interface of copper/steel bi-metal bar through diffusing process were analyzed by means of SEM, XRD and EPMA. Two kinds of different oxygen concentration copper bar were used in the tests. The results indicate that the oxide is not formed in oxygen-free copper even if the diffusion time is very long. The dispersed oxide near the interface in the side of copper is formed because of higher oxygen content in oxygen-bearing copper. The size of oxide increases dramatically with increasing diffusion temperature and prolonging diffusion time and the dispersed zone becomes larger. The fracture near the interface occurs and spreads along the oxide. The oxide is Fe2O3 according to the results of SEM observation and EPMA. The formation of oxide is discussed by thermodynamics analysis.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2006年第3期71-74,80,共5页
Transactions of Materials and Heat Treatment
基金
辽宁省教育厅计划资助项目(202033216)
关键词
铜/钢界面
铜中氧含量
氧化物
扩散
Copper
Diffusion
Fracture
Interfaces (materials)
Oxides
Oxygen
Scanning electron microscopy
Steel
Thermodynamics
X ray diffraction analysis
