Formation of tribochemical layer of ceramics sliding in water and its role for low friction

• Published in: Wear Vol. 245; no. 1; pp. 61 - 75
• Main Authors: Xu, Junguo, Kato, Koji
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01-10-2000; Amsterdam Elsevier Science; New York, NY
• Subjects: Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Friction wear; Friction, lubrication, and wear; Fundamental areas of phenomenology (including applications); Materials science; Mechanical contact (friction...); Physics; Running-in; Solid mechanics; Structural and continuum mechanics; Treatment of materials and its effects on microstructure and properties; Tribo-activation; Tribochemical wear; Tribology and mechanical contacts; Water lubrication; Wear particles; Water lubrication; Friction wear; Tribochemical wear; Wear particles; Running-in; Tribo-activation; Friction; Sliding wear; Tribochemical reaction; Honing; Friction factor; Silicon nitrides; Activation; Ceramics; Lubrication; Experimental study; Activation energy
• ISSN: 0043-1648; 1873-2577
• DOI: 10.1016/S0043-1648(00)00466-X

The formation of a tribochemical layer on silicon nitride sliding in water is studied. The wear mode changes from mechanically dominated wear to tribochemically dominated wear as sliding distance increases. The silica tribochemical layer is formed on the friction surface and reduces the friction. Introducing an additive that accelerates the formation of colloidal silica makes the running-in distance shorter. The activation energy for tribochemical reaction is estimated to be as small as 1/6–1/8 of that for static reaction.