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- W1991266397 abstract "Thick film resistors used in thermal printing heads suffer from abrasion due to kilometres of paper sliding over the surface of the resistive material. In the present work we try to improve the long-term performance by the introduction of an abrasion-resistant coating in the contact area between resistor and paper. Since diamond-like carbon (i-C) is known to exhibit high hardness (3500–6000 HV) and low friction as well as good thermal conductivity and electrical insulation, we deposited 2–4 μm of carbon by ion-assisted chemical vapour deposition and tested it with respect to adhesion, crystal structure and abrasion resistance. After variation of the deposition parameters power, time and bias voltage, we discovered that the i-C layers are only adhesive to one of the two resistor pastes of different suppliers. For the abrasion resistance test, a special mechanical fixture was constructed comprising an excentrically rotating disc on a polishing wheel. The results in terms of time dependence of stylus profile depths are compared with those of uncoated samples. From this it is shown that for i-C-coated samples, the time scale for a fixed amount of thickness decrease is extended by more than one order of magnitude, representing an accordingly enlarged lifetime of the printing head." @default.
- W1991266397 created "2016-06-24" @default.
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- W1991266397 date "1991-08-01" @default.
- W1991266397 modified "2023-09-25" @default.
- W1991266397 title "Abrasion resistance of diamond-like carbon coatings on thick film resistor material" @default.
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- W1991266397 doi "https://doi.org/10.1016/0257-8972(91)90350-6" @default.
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