CATHODIC PROCESS AND WEAR RESISTANCE OF ELECTRO-DEPOSITED RE-Ni-W-P-SiC COMPOSITE COATING |
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基金项目: | The project was supported by Yunnan Provincial Natural Science Foundation (95B11-5). |
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摘 要: | Cathodic deposition current density of the composite coatings increases when SiC par-ticles and rare earth (RE) were added in the bath, which is profitable for Ni- W-P alloy to deposit in the cathod, forming Ni-W-P-SiC and RE-Ni-W-P-SiC composite coatings. On the contrary, the addition of PTFE in the bath decreases cathodic deposition current density of the coatings. The current density increases a little when the amount of RE isγ-9g/l; however, the current density increases greatly when the amount of RE is increased to 11-13g/l. But if the amount of RE is raised further, the current density decreases. Hardness and wear resistance of RE-Ni-W-P-SiC composite coating have been studied, and the results show that the hardness and wear resistance of RE-Ni-W-P-SiC composite coating increase with increasing heat treatment tempera-ture, which reach peak values at 400℃; while the hardness and wear resistance of the coating decrease with the rise of heat treated temperature continuously.
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收稿时间: | 2001-12-26 |
修稿时间: | 2002-04-23 |
CATHODIC PROCESS AND WEAR RESISTANCE OF ELECTRODEPOSITED RE-Ni-W-P-SiC COMPOSITE COATING |
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Authors: | ZCGuo XYZhu RDXu XWYang |
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Affiliation: | Faculty of Material and Metallurgy Engineering, Kunming University of Science and Technology, Kunming 650093, China |
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Abstract: | Cathodic deposition current density of the composite coatings increases when SiC par-ticles and rare earth (RE) were added in the bath, which is profitable for Ni- W-P alloyto deposit in the cathod, forming Ni-W-P-SiC and RE-Ni-W-P-SiC composite coat-ings. On the contrary, the addition of PTFE in the bath decreases cathodic depositioncurrent density of the coatings. The current density increases a little when the amountof RE is 7-9g/l; however, the current density increases greatly when the amount ofRE is increased to 11-13g/l. But if the amount of RE is raised further, the currentdensity decreases. Hardness and wear resistance of RE-Ni-W-P-SiC composite coat-ing have been studied, and the results show that the hardness and wear resistance ofRE-Ni-W-P-SiC composite coating increase with increasing heat treatment tempera-ture, which reach peak values at 400℃; while the hardness and wear resistance of thecoating decrease with the rise of heat treated temperature continuously. |
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Keywords: | electrodeposition RE-Ni-W-P-SiC composite coating cathodic process hardness and wear resistance |
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