Abstract
Oxygen‐induced surface segregation of hydrogen has been investigated in polycrystalline titanium. It was found that sulphur impurities in titanium preferentially segregate to the surface on heating the sample. Consequently, the properties and reactivity of the sulphur‐containing surfaces were modified relative to sulphur‐free samples in a way which enabled the performance of quantitative kinetic segregation measurements utilizing direct recoil spectrometry (DRS). The time behaviour of hydrogen accumulation on the surface pointed to a segregation mechanism involving subsurface‐to‐surface hopping as the rate‐determining step.
| Original language | English |
|---|---|
| Pages (from-to) | 643-649 |
| Number of pages | 7 |
| Journal | Surface and Interface Analysis |
| Volume | 18 |
| Issue number | 9 |
| DOIs | |
| State | Published - 1 Jan 1992 |
ASJC Scopus subject areas
- Chemistry (all)
- Condensed Matter Physics
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Materials Chemistry