Kinetic Equation for Internal Oxidation of Cu-Al Alloy Spheres

• Published in: Journal of Wuhan University of Technology. Materials science edition Vol. 22; no. 1; pp. 22 - 26
• Main Authors: Song, Kexing, Gao, Jianxin, Xu, Xiaofeng, Li, Peiquan, Tian, Baohong, Guo, Xiuhua
• Format: Journal Article
• Language: English
• Published: Wuhan Springer Nature B.V 01.02.2007; Jiang Yin Xing Cheng Special Steel Works Co.,LTD,Jiangyin 214400,China%School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471003,China; School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471003,China
• Subjects: Alloys; Oxidation; 内氧化; 动力学方程; 铜-铝合金球; 铜基复合材料; internal oxidation; kinetic equation; Cu-Al alloys; sphere
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/s11595-005-1022-5

The kinetics of internal oxidation of Cu-Al alloy spheres, containing up to 2.214% mole fraction Al was investigated in the temperature range 1 023 K to 1 273 K, and the depth of internal oxidation was measured in the microscopy. A kinetic equation was derived to describe the internal oxidation of Cu-A1 alloy spheres, which was checked experimentally by means of oxidation depth measurements. The results show that the derived equation is exact enough to describe the kinetics of internal oxidation of Cu-Al alloy spheres. Based on this equation and the oxidation depth measurements, the permeability of oxygen in solid copper has been obtained. Investigation also shows that in the process of internal oxidation, there is no evidence for preferential diffusion along grain boundaries.