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Thesis (M.S.)--Oregon State University, 2005. / Printout. Includes bibliographical references (leaves 91-93). Also available on the World Wide Web.

Thesis (Ph. D.)--University of Texas at Austin, 2004. / Supervisor: John Lacy. Vita. Includes bibliographical references. Also available from UMI.

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Experimental measurements of surface temperatures produced during dry sliding contact were made by using an advanced infrared microscope which receives radiation from a very small target area e.g., 1.78 x 10⁻⁵m in diameter for a 36X objective, allowing temperature measurements within a general region of contact. The sliding system consisted of an Armco iron pin, with a hemispherical end loaded against a rotating sapphire disk. A statistical study was made concerning the effect of environment, load, and velocity on temperature, wear, and coefficient of friction. The formation of iron oxides and its influence on emissivity and possible correlation with wear and friction is discussed. Comparison between the experimental results and the flash temperature theories by both Jaeger and Archard is made. / Master of Science

Surface temperatures generated by dry sliding friction were measured with the use of an infrared radiometric microscope system developed at Virginia Polytechnic Institute and State University. Silver was used as the test material because of its resistance to oxide formation. The effects of load, velocity, geometry, and environment on surface temperatures, friction, and wear were investigated for the system of silver sliding on sapphire. Results of this investigation indicate that load, velocity, and geometry had significant effects on surface temperature rise, with load having the strongest effect. Measured values of surface temperature rise agreed reasonably well with the theoretical predictions of Archard and Jaeger. Load and environment were found to have a significant effect on the coefficient of friction. The average value of the coefficient of friction for each test was lower in nitrogen than in air. Load, geometry, velocity, and environment were significant to the wear rate. A striking difference was noticed in the structure that formed adjacent to the contact region for the different environments. / M.S.

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