| AVS 59th Annual International Symposium and Exhibition | |
| Tribology Focus Topic | Tuesday Sessions |
| Session TR-TuA |
| Session: | Molecular Origins of Friction and Wear |
| Presenter: | B.A. Krick, University of Florida |
| Authors: | B.A. Krick, University of Florida K.R. Marchman, University of Florida S.B. Sinnott, University of Florida W.G. Sawyer, University of Florida |
| Correspondent: | Click to Email |
Ionic solids have simple and well known crystalline structures while spanning several orders of magnitude in wear rates; this makes them excellent candidates for fundamental studies in wear. Wear experiments on the (001) surface of rock-salts, including NaCl and MgO, revealed that the material wear rates have significant dependency on crystallographic wear direction. The materials experienced maximum wear when sliding in the <100> family of directions and minimum wear when sliding in the <110>. For MgO the wear rate in the <100> direction was approximately three times that in the <110> direction. Wear experiments were performed at angles relative to the [100] direction in six degree increments revealing wear as a sinusoidal function of direction with 90 degree periodicity. These results offer a direct link between material structure and the wear properties of a material.