Submicron diamonds were co-deposited on aluminum substrates with copper from the acid copper sulfate electrolyte by electro- lyte-suspension co-deposition. After submicron diamonds were added to the electrolyte, the s...Submicron diamonds were co-deposited on aluminum substrates with copper from the acid copper sulfate electrolyte by electro- lyte-suspension co-deposition. After submicron diamonds were added to the electrolyte, the shape of copper grains transformed from oval or round to polyhedron, the growth mode of copper grains transformed from columnar growth to gradual change in size, and the preferred ori- entation of copper grains transformed from （220） to （200）. Analyzing the variation of cathodic overpotential, it was found that the cathodic overpotential tended to remain tmchanged when copper plane （220） grew in the process of electrodepositing pure copper, while it tended to decrease with time when copper plane （200） grew in the process of co-deposition. It was inferred that copper plane （200） was propitious to the deposition of submicron diamonds.展开更多
Zinc Cr(Ⅲ)passivation layer(Zn-PL)could effectively protect NdFeB materials from corrosion.However,long-term exposure of Zn-PL to ambient atmosphere would reduce its wettability spontaneously,which hinders or deterio...Zinc Cr(Ⅲ)passivation layer(Zn-PL)could effectively protect NdFeB materials from corrosion.However,long-term exposure of Zn-PL to ambient atmosphere would reduce its wettability spontaneously,which hinders or deteriorates the adhesion of post-deposited materials.To solve this issue,a multilayer developed by layer-by-layer assembly approach was designed,and alumina sol and silica sol were prepared.A poly acrylic acid(PAA)layer was firstly deposited on Zn-PL to remove the preabsorbed organic carbon and form poly(zinc acrylate).Then,Al_(2)O_(3)and SiO_(2)sol-gel layers were sequentially assembled on PAA-coated Zn-PL.As a result,the hydrophobic Zn-PL turns into super-hydrophilic by coating organic-inorganic multilayers,which is attributed to the surface enrichment of hydrophilic hydroxyl groups and increases surface roughness.Furthermore,the super-hydrophilic surface displays excellent adhesion property without the negative effect on its other properties,which highlights a good prospect for a wide application of NdFeB or other potential materials.展开更多
文摘Submicron diamonds were co-deposited on aluminum substrates with copper from the acid copper sulfate electrolyte by electro- lyte-suspension co-deposition. After submicron diamonds were added to the electrolyte, the shape of copper grains transformed from oval or round to polyhedron, the growth mode of copper grains transformed from columnar growth to gradual change in size, and the preferred ori- entation of copper grains transformed from （220） to （200）. Analyzing the variation of cathodic overpotential, it was found that the cathodic overpotential tended to remain tmchanged when copper plane （220） grew in the process of electrodepositing pure copper, while it tended to decrease with time when copper plane （200） grew in the process of co-deposition. It was inferred that copper plane （200） was propitious to the deposition of submicron diamonds.
基金financially supported by the National Natural Science Foundation of China(No.51371020)。
文摘Zinc Cr(Ⅲ)passivation layer(Zn-PL)could effectively protect NdFeB materials from corrosion.However,long-term exposure of Zn-PL to ambient atmosphere would reduce its wettability spontaneously,which hinders or deteriorates the adhesion of post-deposited materials.To solve this issue,a multilayer developed by layer-by-layer assembly approach was designed,and alumina sol and silica sol were prepared.A poly acrylic acid(PAA)layer was firstly deposited on Zn-PL to remove the preabsorbed organic carbon and form poly(zinc acrylate).Then,Al_(2)O_(3)and SiO_(2)sol-gel layers were sequentially assembled on PAA-coated Zn-PL.As a result,the hydrophobic Zn-PL turns into super-hydrophilic by coating organic-inorganic multilayers,which is attributed to the surface enrichment of hydrophilic hydroxyl groups and increases surface roughness.Furthermore,the super-hydrophilic surface displays excellent adhesion property without the negative effect on its other properties,which highlights a good prospect for a wide application of NdFeB or other potential materials.
