An Experimental Study of Surface Temperatures Generated at the Solid-Solid Interface.
Abstract
This is a final report on the first phase of an experimental investigation of surface temperatures generated by sliding contact between solids. Emphasis is on the determination of surface temperatures by means of a geometrically simple but functionally sophisticated device built around the use of an infrared microscope. The device consists basically of a fixed specimen (e.g., sphere, cylinder, flat, or cone) loaded against a thin rotating disc transparent to infrared radiation, in this case an optically flat sapphire disc 1mm thick. Since the target spot size is much smaller than the region of macroscopic elastic or plastic contact, it is possible to scan the contact region by moving the infrared microscope very precisely in the horizontal x-y plane. With this apparatus, applied loads can be varied from 0.1 to 10N while sliding velocities from .001 to more than 10m/s can be achieved. Measurements made include radiance, emissivity, friction, and area of contact and surface damage information obtained from scanning electron micrographs. Using this method, the surface temperature and tribological behavior of several model systems (e.g., various polymers, graphite) was investigated and the results compared with existing theory. As an example, it has been possible (a) to measure the detailed temperature distribution over a tiny region of elastic (Hertz) or plastic contact in a dry sliding system and (b) to relate this information to real areas of contact.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1977
- Accession Number
- ADA047735
Entities
People
- Michael J. Furey
Organizations
- Virginia Tech