网易能买彩票 www.qjlz.net Diamond-like Carbon Coatings & Plasma Immersion Ion Deposition Technology
Nano Composite Structure and Plasma Enhanced Magnetron Sputter (PEMS) Technology
Plasma immersion ion deposition process is used to deposit hard and lubricous diamond-like carbon coatings. Plasma Immersion Ion Deposition Technology (PIID) is a kind of PECVD (plasma enhanced chemical vapor deposition).
In the process of plasma immerse deposition, there is no need to rotate parts (all-round technology), so the PIID has advantages particular in large volume, three-dimensional parts surface treatment. Compared to conventional PECVD process, the main advantage of the PIID is the use of pulsed plasma to deposit coatings which allows low temperature deposition and minimizes arcing.
SwRI Diamond-like Coating Test Facilities
The parts are installed inside a vacuum system. After the vacuum system is pumped down, a gas is fed in. Then a train of pulses of negative voltage is applied to the parts, a pulsed glow discharge (PGD) plasma is generated in the entire vacuum chamber. The pulsed voltage also draws the ions to the surfaces, depending on the ion energy (pulsed voltage) and ion species (discharging gas), either ion sputter cleaning or deposition of diamond-like coatings deposition can be performed. Usually, the first of all to clean the parts so as to ensure the coating has a good adhesion. Then, coating film will be made at vacuum condition to get ideal of diamond-like coatings. Above picture is the SwRI’s facilities for diamond-like coating deposition.
? High hardness (account to the 20%-30% of the diamond)
? Low friction (<0.05 dry state)
? Chemical inertness
? Extremely smooth film
? Excellent metallic adhesion through process control
? Deposit temperature lower than 150℃
? Coating operating temperature reaches 400℃ at maximum