Effects of Codeposition of Cu on Microstructure and Thermal Stability of Electroless Ni-P Coatings
- 化学化工－已发表论文 
The electroless Ni-Cu-P coatings with different Cu content have been deposited from alkaline bath. The surface morphology, microstructure and crystallization behaviour of the electroless Ni-Cu-P alloys have been studied by SEM, XRD and DSC. The results show that the concentration of CuSO_4·5H_2O in the bath has a great effect on the composition of the deposits and the deposition rate. The codeposition of a small amount of Cu makes the crystal grains of the deposits become smaller, but with the Cu content increasing, the deposits exhibit a larger grain size and a more coarse surface morphology. The thermal stability of Ni-Cu-P deposit increases with the Cu content increasing in the deposits.