Formation of Transition Phases on Interface between Monocrystalline Fe and Cu Due to Mutual Solid-State Diffusion

Archives of Metallurgy and Materials

G. Boczkal¹  M. Perek-Nowak¹ 

[1] AGH University of Science and Technology, Facult y of Non-ferrous Metals , al. Mickiewicza 30, 30-065 Kraków, Poland

关键词: Keywords: copper single crystal;    iron single crystal;    transition phases;    solid-state diffusion;   

DOI  :  10.1515/amm-2016-0099

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

Interdiffusion between Fe (Armco) and Cu single crystals of similar orientation (around [110]) annealed at temperatures of 873 and 973K in air for 0.5 up to 4 h is studied. Formation of three phases different in their chemical composition has been observed: 1) oxide layer on Cu border (porous), 2) a layer rich in copper, iron and oxygen, 3) a layer of iron and oxygen with only small addition of Cu. All reactions of interface formation occurred in solid state. It was noted that oxygen plays an important role in development of new phases. Strong Kirkendall effect is observed due to large difference in diffusion coefficients of copper atoms to iron, DCu→Fe=300exp(-67800/RT) and iron atoms to copper DCu→Fe=0.091exp(-46140/RT).

【 授权许可】

Unknown