Surface energy abrasion

Having calculated the force for a particular event the slip is calculated using the bush model and hence the energy dissipation is obtained. Using the factors of the abrasion equation, determined with the LAT 100 on an alumina surface the abrasion loss for each event is calculated. The forces are different for a driven and a nondriven axle and accordingly different abrasion rates will result. 

The fraction lj of this kinetic energy is used to create free surface energy via abrasion,... 

In this case too, polyurethanes were produced in order to obtain water and oil repellant products, which have good abrasion resistance and very low surface energy. 

In comparison with metals, most conventional polymers are low in wear resistance. For wear control, we need to understand various wear mechanisms for each polymer system (V). As discussed in a previous paper, for adhesive wear, surface energetics can determine the extent of surface wear. Thus, a low surface energy is preferred to minimize the surface attrition. In addition, a harder polymer is desired to lower the wear rate. For abrasive wear, fracture energetics become important a harder and tougher material should be more wear resistant. 

Surface modifications with plasmas have specific applications for systems requiring special protections, e.g., low surface energy or low wear resistance. Surface photopolymerization has yet to prove its value. The protection of a polymer surface with abrasion-resistant, silicone-silica hybrid material has demonstrated some utilities for polycarbonate or other optical materials. 

By contrast, active fillers, exclusively selected fi om different kinds of pyrogenic silica with BET surfaces of 90-350 mVg, are able to strongly interact with both themselves and the dimethylsiloxane polymers, which is due to their high surface energy and ability to form hydrogen bridges. This interaction results in a marked increase in mechanical strength, mainly abrasion and tear resistance, of the cured rubber. 

Friction can be described as the resistance to relative lateral motion between two surfaces, while abrasion describes the deformation and forcible removal of material from one surface by material of another surface. Both of these effects facilitate the release of energy, altering physical surface structure at the atomic and molecular level of the materials. The energy released by the alteration of surface structure by friction and abrasion becomes sensible as heat conducted through the mass of the material. 

---