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HYC 20 |
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| Description |
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Hyc20 is a Silicon Carbide Coating within a dense hardened Electroless Nickel Matrix, it has a slightly darker appearance than that of Electroless Nickel Plate. Silicon Carbide comprises 25% of the coating by volume. The Silicon Carbide particle size is 3 - 5 microns. |
| Coating Thickness |
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Hyc20 is applied in deposit thickness to .004 - .005 inches (0.1 - 0.2mm). the coating is even and requires no post coating machining. The coating requires no post coating sealing due to the "Built In" corrosion resistance of the Electroless Nickel Matrix. |
| Coating Hardness |
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Baulk Hardness 1300-1500 Vickers. The above figure is a combination of matrix hardness 1000 Vickers and inclusion hardness 2500-3000 Vickers. |
| Frictional Properties |
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The coating shows excellent frictional properties at ambient and elevated temperatures up to 1000°C. When wearing against itself or other hard coatings, Hyc20 shows low frictional properties, excellent lubricity and load carrying capability with extreme resistance to seizure under load. The friction co-efficient shows a slight decrease with an increase in load and also decreases with temperature. At extreme temperatures (600°C - 1000°C) the wear mechanism changes due to the lowering of the frictional co-efficient and tracks cease to be worn and a polishing action is produced. |
| Wear Properties |
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Hyc20 exhibits exceptional wear properties when compared on test to other coatings using both Taber Wear Tests and Cross Cylinder Wear Tests. Taber Wear Tests show weight loss in milligrams per 1000 revolutions, of coated test panels against an abrasive wheel. The lower the weight loss - the better wearing the coating. Below are a few results. Coating Weight Loss Electroplating Nickel 26 - 27 mg Medium Phosperous Electroless Nickel 10.3 mg Hard Chrome Plate 5.1 mg Hyc20 0.2 - 2 mg |
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Cross
Cylinder wear test show results as weight loss. This test measures weight
loss of cylinders wearing against each other with various coatings. Coating Weight Loss Electroless Nickel against Electroless Nickel Above 32 g Inconel 718 against Electroless Nickel Above 9 g Hard Chrome against Hard Chrome Above 6 g Electroless Nickel against Steel Above 4 g Hard Chrome against Steel Above 4 g Stellite 6 against Stellite 6 Above 1 g HYC 20 against HYC 20 Below 0.1 g |
| Recommended for Use |
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HYC 20 can be used on a wide variety of parts, especially recommended for use on parts of a complex geometry or where lowering of Torque values are required. Typical Examples Valves e.g. Balls, Seats and Gates Pumps e.g. Pistons, Head Bores, Pump Shafts Compressors e.g. Compressor Bores Engines e.g. Cylinder Bores, Liners Injection Moulds e.g. All Mould Surfaces |
| For more information on HYC 20, such as abrasion resistance test results please contact us |