The Structure and Reactivity of Boron and Carbon Surfaces.
Abstract
Research funded by this grant focused on three areas: First, we have explored the surface chemistry associated with reactions of O2, D2O, B2O2 and B203 with boron thin films grown on Ta(110) through the thermal decomposition of diborane. These reactions were studied mainly with the techniques of X-ray photoelectron spectroscopy and mass analyzed thermal desorption. We find that both O2 and D2O form a B2O3-like oxide on the surface but that the oxide desorbs mainly as B2O2. Second, we have studied the reaction of B2O3 and O2 with graphitic carbon deposited on the Pt(111) surface. Although B2O3 is known to inhibit the oxidation of carbon/carbon composites, we found that B2O3 deposited on a carbon layer on Pt(111) completely removes the surface carbon by oxidizing it at 1000 K to CO(g). Although we also observe the desorption of B2O2(g) from the surface, we determined that the B2O3 is reduced in the process to elemental boron. Third, we finished some experiments during the first few months of the grant on the oxidation of the LaB6(100) surface. jg
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 22, 1995
- Accession Number
- ADA292804
Entities
People
- Michael Trenary
Organizations
- University of Illinois Urbana–Champaign