Title: Fabrication and characterization of electroless Ni-P-ZrO 2 nano-composite coatings
Abstract: A novel technique has been developed to produce nano-particle oxide reinforced metal coatings. This method is based on electroless deposition process by adding ZrO2 sol into conventional electroless Ni-P plating bath. Ni-P-ZrO2 nano-composite coatings have been produced with highly dispersive ZrO2 nano-particles inside the alloy coating matrix. The as plated nano-composite coating exhibits much increased microhardness up to 1045 HV200 and remarkably improved wear resistance. X-ray and electron diffraction patterns show a phase transformation in the Ni matrix of the coating from amorphous to nanocrys- talline when ZrO2 sol is introduced into the coating. By comparison with the plain Ni-P coating and conventional Ni-P-ZrO2 composite coating incorporated with solid ZrO2 powders, two mechanisms for the increased mechanical properties are proposed based on nano-particle dispersion strengthening and phase transformation strengthening. The formation mechanism of ZrO2 nano-particle is also discussed.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot