AVS 45th International Symposium
    Surface Science Division Friday Sessions
       Session SS2-FrM

Paper SS2-FrM10
Effect of Boron on the Surface Chemistry of Single Crystal Ni@sub 3@(Al,Ti)

Friday, November 6, 1998, 11:20 am, Room 309

Session: Water and Ice Interfaces
Presenter: B. Zhou, Northwestern University
Authors: B. Zhou, Northwestern University
J. Wang, Northwestern University
Y.W. Chung, Northwestern University
Correspondent: Click to Email
Previous work demonstrated that water dissociates into atomic hydrogen on Ni@sub 3@(Al,Ti)(100). There is clear evidence that this dissociation reaction results in the reduced ductility of many polycrystalline aluminum-based alloys in a moist environment. Ductility measurements further show that boron addition to these alloys increases ductility. Therefore, it is reasonable to expect that boron may affect the production of atomic hydrogen from water vapor dissociation and its surface mobility. To explore the effect of boron, we first dosed the surface of clean Ni@sub 3@(Al,Ti)(100) with controlled amounts of boron, using a specially designed low-energy boron ion source, followed by low-temperature exposure to D@sub 2@O and temperature-programmed desorption. The state of the surface was determined by x-ray photoemission. These studies show that addition of boron reduces the production of atomic hydrogen. The significance of this observation in explaining the beneficial effect of boron will be discussed.