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The invention relates to steel or cast iron piston rings with a coating of chromium nitride deposited by a physical vapour deposition on the sliding surface. The coating is composed of a columnar crystal structure of CrN with an oxygen content in solid solution of 0.5 to 2.5 wt%; and uniformly dispersed micro-pores of less than 10% in volume of the coating. The X-ray diffraction intensity ratio of the coating is also described.
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## Patents to 500Β°F (-55Β°C to 260Β°C). b,owor. o Patents A process for 1760 rpm, the maximum shaft speed in other applications can be up to This is a list of recently published sealing the rotor of 25 000 rpm or 45 m/s (150 ft/sec), patents coveting designs and inven-Other options available to incr
A voltage-sensitive separator is prepared simply by impregnating electroactive poly(3-decylthiophene) (P3DT) polymer into a commercial porous separator and tested for a self-actuating control of overcharge voltage of LiFePO 4 /C lithium-ion batteries. The experimental results demonstrate that this t