Table 3 Peak positions of the P L-and K-edge, and O K-edge XANES (FY) spectra of tribofilms at different temperatures and model compounds.
From: Chemical nature of alkaline polyphosphate boundary film at heated rubbing surfaces
Parameters | P L -edge (eV) | P K -edge (eV) | O K -edge (eV) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
a | b | c | d | a | b | c | a | a’ | b’ | b | c | ||
600 °C | S | ~135.6 | ~136.7 | ~138.7 | ~146.5 | ~2148.7 | ~2155.1 | ~2167.2 | ~530.3 | ~531.6 | ~533.9 | ~537.7 | ~541.5 |
ES | ~135.7 | ~136.6 | ~138.6 | ~146.4 | ~2148.9 | ~2155.1 | ~2167.4 | ~530.2 | ~531.5 | ~533.8 | ~537.2 | ~540.8 | |
700 °C | S | ~135.8 | ~136.8 | ~138.8 | ~146.5 | ~2148.7 | ~2155.1 | ~2167.2 | ~530.1 | ~531.5 | ~533.8 | ~537.8 | ~541.5 |
ES | ~135.7 | ~136.7 | ~138.8 | ~146.5 | ~2148.9 | ~2155.1 | ~2167.4 | ~530.2 | ~531.4 | ~533.9 | ~537.3 | ~540.7 | |
800 °C | S | ~135.9 | ~136.9 | ~138.7 | ~146.5 | ~2148.5 | ~2155.1 | ~2167.5 | ~530.1 | ~531.4 | ~534.0 | ~537.3 | ~541.7 |
ES | ~135.9 | ~136.8 | ~138.8 | ~146.5 | ~2148.7 | ~2154.9 | ~2167.4 | ~530.1 | ~531.2 | ~534.0 | ~536.6 | ~540.9 | |
NaPO3 | ~135.6 | ~136.5 | ~138.1 | ~146.4 | ~2149.0 | ~2155.1 | ~2167.3 | ~530.4 | ~531.4 | ~533.9 | ~537.3 | ~541.4 | |
FePO4 | ~135.3 | ~136.6 | ~138.4 | ~145.8 | – | – | – | – | – | – | ~537.2 | – | |
Fe2O3 | – | – | – | – | – | – | – | ~530.0 | ~531.5 | – | ~537.3 | ~541.5 | |
