Study of Tribology over the Past Twenty Years - Fundamentals and Applications

摘要

The representative research results over the past 20 years at my laboratory are introduced as follows, (1) Static friction coefficient changes by the shape of contact area. (2) Different wear modes are classified in one diagram as Wear Map by introducing indexes of severity of contact. (3) Repeated sliding friction at self-mated SiC and Si_3N_4 in water generates friction coefficient below 0.01. Micro texture on contact surfaces generates friction coefficient in the order of 0.0001. (4) Tribo-coating of indium on the surface of SUS440C disk generates friction coefficient below 0.05 against Si_3N_4 pin in high vacuum. (5) N_2 gas supply at the contacts of Si_3N_4/CN_x and CN_x/CN_x in air generates friction coefficient in the order of 0.001. (6) Tribolayer formed by tribo-chemical reaction changes friction and wear drastically.