Advanced Materials & Processes

NOV-DEC 2013

Covers developments in engineering materials selection, processing, fabrication, testing/characterization, materials engineering trends, and emerging technologies, industrial and consumer applications, as well as business and management trends

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i T S S e Fig. 6 — High temperature pin on disc testing on NASA PS 304 coating. 8 wear graph for the PS 304 coating. It shows periodic spikes in the wear graph indicating a build-up of transfer film and possible enhanced wear due to that. Such wear behavior could be deleterious to the overall performance of the bearing or actuator components. Figures 4 and 5 show the wear scar on the M50 pin tip and on the coated Inconel discs. The wear scar on the Triboglide coating is minimal and the amount of transferred film on the pin tip is nominal, indicating an excellent friction coefficient with low noise and minimal galling. Triboglide coating with silver shows increased galling on the pin tip as seen in Fig. 5 and also the wear track on 68 the coated disc is wider, indicating lower wear resistance. Figure 6 shows the wear behavior of the PS 304 coating and it seems the coating shows sporadic wear spikes and unsteady wear track. There seems to be intermittent transfer film buildup on the pin from the worn coated disc, leading to spikes on the wear track. The Triboglide coating shows excellent wear and friction properties iTSSe compared to the commercially available PS 304 coating. For more information: Satish Dixon is Director Engr./R&D, Plasma Technology Inc., 1754 Crenshaw Blvd., Torrance CA 90501, 310/320-3373,, ADVANCED MATERIALS & PROCESSES • NOVEMBER-DECEMBER 2013

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