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The effect of the field-induced water meniscus on the friction level and oscillation was studied using an atomic force microscopy tip sliding on a highly ordered pyrolytic graphite (HOPG) surface. The results showed that the friction characteristics were significantly affected by the bias voltage, humidity, and sliding velocity. The friction level increased when the bias voltage increased beyond a...
The effect of transfer layer formation on friction performance was studied using a brake friction material containing 15 ingredients. Based on a base formulation, 13 friction material specimens containing different relative amounts of ingredients were produced and they were tested on gray iron disks using a small-scale friction tester. A non-destructive four-point probe technique to measure electrical...
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