Long description of figure 1

Left: The wear track (groove) on flat B4C introduced from the oxide ceramics during a reciprocating wear test; 200,000 passes in humid air. Right: Scanning electron micrograph of the polyphase microstructure at the contact area; very little wear damage and lifting is observed following the reciprocating wear test with 200,000 passes in humid air. White particles at the top left corner are wear debris particles and small fracture pits within the Al₂O₃ phase (at the middle right of the picture in black).

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