Figure 6
From: Chemical nature of alkaline polyphosphate boundary film at heated rubbing surfaces

Positive and negative secondary ion and total ion signals obtained from the originally worn surface at 800 °C: Intensities are color-coded.
From: Chemical nature of alkaline polyphosphate boundary film at heated rubbing surfaces

Positive and negative secondary ion and total ion signals obtained from the originally worn surface at 800 °C: Intensities are color-coded.