Oxidation Resistance and High‐Temperature Lubricating Properties of Magnesium‐Phosphate‐Treated Graphite

The oxidation resistance and lubricating properties of graphite treated with magnesium phosphate were investigated. Magnesium‐phosphate‐treated graphite showed improved oxidation resistance. That is, with magnesium‐phosphate treatment, the oxidation temperature of graphite increased by almost 200°C. Furthermore, the friction coefficient of magnesium‐phosphate‐treated graphite measured at 500°C was about 0.05, which was smaller than that measured at room temperature.