Influence of Apparent Contact Area on Wear Properties of Hard-Drawn Copper Contact Wire and Iron-Based Sintered Alloy Contact Strip under Electric Current Flowing Condition
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چکیده
منابع مشابه
Study on Friction and Wear Properties of Pantograph Strip/Copper Contact Wire for High-Speed Train
A series of experiments on friction and wear properties of carbon strip rubbing against copper contact wire is performed on high-speed friction and wear tester with electric current. The results show that the friction coefficient is generally maintained between 0.24 and 0.37. In the absence of electric current, the coefficient of friction is higher than that in the presence of electric current....
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Flash sintering has been investigated as a modern sintering method through examining the effect of processing parameters such as current density, temperature, and contact paste on the flash sintered 8YSZ characteristic. 95% of theoretical density was achieved at 800°С in 30sec with a field intensity of 100V.cm-1 and a current density of 160mA.mm-2. Such relative density in conventional sinterin...
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The hot gases produced by the internal combustion engines passes through the exhaust valve and causes high temperatures in the exhaust valve and its seat. To avoid damaging the exhaust valve, heat must be transferred from the valve to its seat during the contact they make at the opening and closing cycle. Heat transfer rate from the exhaust valve to its seat is a function of many factors. One o...
متن کاملContact lens induced keratitis associated with contact lens wear.
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ژورنال
عنوان ژورنال: Tribology Online
سال: 2019
ISSN: 1881-2198
DOI: 10.2474/trol.14.102