Kumar, Sampath TS and Mallya, RM and Hegde, MS (1988) Surface segregation and oxidation studies on Cu-Ni-Sn and Ag-Cu-Ge ternary alloys. In: Applied Surface Science, 35 (1). pp. 63-75.
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Surface segregation and oxidation of Cu-9.7at%Ni-2.3at%Sn and Ag-39at%Cu-1.6at%Ge ternary alloys have been carried out employing XPS and AES techniques. Segregation of both Ni and Sn have been observed on the surface of Cu-Ni-Sn alloy. On oxidation of this alloy at 500 K, $Cu_2O$, NiO and SnO have been observed and on heating the oxidized alloy in vacuum to 600 K, $Cu_2O$ was reduced to Cu through a displacement reaction involving Ni. Further heating to 750 K showed only $SnO_2$, along with the reduction of NiO to Ni. The Ag-Cu-Ge alloy showed segregation of both Ag and Ge to the surface. On oxidation at 500 K, only $Cu_2O$ and GeO have been observed. Heating of the oxidized surface to 700 K in vacuum showed desorption of GeO, coupled with the reduction of $Cu_2O$ to Cu. thereby leaving the alloy surface clean.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Elsevier Science.|
|Department/Centre:||Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
|Date Deposited:||20 Feb 2008|
|Last Modified:||19 Sep 2010 04:42|
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