| ZHENG Xiao-hui,SHAN Dong-dong,SONG Hao,YE Xiong,WU Di,TAN Jun.Electroless Nickel Plating Process and Properties of Alumina Ceramics[J],46(10):128-134 |
| Electroless Nickel Plating Process and Properties of Alumina Ceramics |
| Received:May 14, 2017 Revised:October 20, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.10.018 |
| KeyWord:alumina electroless nickel plating microstructure microhardness thermal shock method |
| Author | Institution |
| ZHENG Xiao-hui |
Department of Equipment Maintenance and Remanufacturing, Academy of Armored Force Engineering, Beijing , China |
| SHAN Dong-dong |
Department of Equipment Maintenance and Remanufacturing, Academy of Armored Force Engineering, Beijing , China |
| SONG Hao |
Department of Equipment Maintenance and Remanufacturing, Academy of Armored Force Engineering, Beijing , China |
| YE Xiong |
Department of Equipment Maintenance and Remanufacturing, Academy of Armored Force Engineering, Beijing , China |
| WU Di |
Department of Equipment Maintenance and Remanufacturing, Academy of Armored Force Engineering, Beijing , China |
| TAN Jun |
Department of Equipment Maintenance and Remanufacturing, Academy of Armored Force Engineering, Beijing , China |
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| Abstract: |
| The work aims to study the effects of plating time on surface morphology, microstructure, microhardness, surface roughness and adhesion of electroless nickel plating on alumina. Plating bath composition and process parameters were as follows: NiSO4•6H2O 25 g/L, NaH2PO2•H2O 22 g/L, Na3C6H5O7•2H2O 64 g/L, (NH4)SO4 62 g/L, pH=5.0~6.0, heating in water bath to 90 ℃ and plating time 1~4 h. Surface morphology of the coatings was observed by using NovaNanoSEM50 field emission scanning electron microscopy (SEM), hardness by TH765 automatic microhardness tester, surface roughness by OLS4000 3D measurement in-strument and adhesion strength by thermal shock test and in indentation method. Provided with plating time of 1~4 h, the coatings exhibited good metallic glossiness and looked silvery white after 1 h, the coating was more delicate after 4 h, but the surface gloss was poor. As the deposition time prolonged, the smoother surface of nickel plating on Al2O3 was, the higher its microhardness would be; the electroless coatings were free from blistering, flaking or with separation from alumina matrix. Provided with the plating time of 1~4 h, unchanged temperature and pH, as the plating time prolongs, the thickness of coatings changes slightly, the coating grains are finer, microhardness increases obviously and surface roughness reduces. Also, the coating exhibits good adhesion to substrate. |
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