Citation:
	            
		            Yang  Fang-Zu, Ma  Zhao-Hai, Huang  Ling, Xu  Shu-Kai, Zhou  Shao-Min. Electrodeposition, Structure and Properties of an Amorphous Ni-W-B/ZrO2 Composite Coating[J]. Acta Physico-Chimica Sinica,
							;2004, 20(12): 1411-1416.
						
							doi:
								10.3866/PKU.WHXB20041203
						
					
				
					
				
	        
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	                	Ni-W-B/ZrO2 composite coating was electrodeposited from the Ni-W-B electrolyte solution containing zirconia particles. The electrodeposition, heat treatment, structure, surface morphology, microhardness, and corrosion resistance of the composite coating were studied by means of differential scanning calorimeter (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical techniques. The results showed that the mass composition of the obtained Ni-W-B/ZrO2 composite coating was Ni 47.5%,W 40.9%, B 0.9% and ZrO2 10.7%. DSC combined with XRD results illustrated that zirconia took a remarkable influence on the structure of Ni-W-B matrix, leading the composite coating to a more obvious amorphous characteristics. The composite coating presented in higher microhardness compared to Ni-W-B alloy, granular structure with grain boundaries and crack-free. Zirconia particles were dispersed in the Ni-W-B matrix. After heat treatment at 400 ℃ for 1 h, surface morphology of the coating was kept almost no changes. The structure of the matrix was transferred to a crystal of Ni-W solid solution, and W was segregated to the surface of the deposit. The microhardness and corrosion resistance were enhanced, whereas most of zirconia particles were tten rid of from the surface layer.
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