Zirconia(ZrO_2)incorporated ceramic coatings were fabricated on biodegradable ZM21 Mg alloy by the PEO coupled with EPD process.Subsequently,the sample surface was modified by laser texturing to improve the corrosion ...Zirconia(ZrO_2)incorporated ceramic coatings were fabricated on biodegradable ZM21 Mg alloy by the PEO coupled with EPD process.Subsequently,the sample surface was modified by laser texturing to improve the corrosion resistance,roughness and cell proliferation and growth properties.The corrosion performance of the fabricated samples along with the substrate was studied by electrochemical measurements under simulated body fluid(SBF)environment.The cell direct contact assay was conducted for the substrate and fabricated samples using L-929 mouse fibroblast cells for 24 h.The phase contrast images of cell direct contact assay revealed that fabricated samples exhibited better contact and response with the fibroblast cells,compared to the substrate.The addition of nanoparticles in the PEO process,called PEO coupled EPD process,resulted in attaining a higher thickness and improved corrosion performance of the samples than the PEO coated samples.Among all the samples,laser surface textured PEO,and PEO-EPD coated samples unveiled enhanced corrosion resistance,cell growth,thereby enabling it as a suitable prototype for biodegradable implant applications.展开更多
The cubic fluorite structure Sm_(0.2)Ce_(0.8)O_(1.9)(SDC)film was fabricated by pulsed laser deposition(PLD)to be used as electrolyte for solid oxide fuel cells(SOFCs).The SDC target was prepared by co-precipitation p...The cubic fluorite structure Sm_(0.2)Ce_(0.8)O_(1.9)(SDC)film was fabricated by pulsed laser deposition(PLD)to be used as electrolyte for solid oxide fuel cells(SOFCs).The SDC target was prepared by co-precipitation process at a low sintering temperature(1,250℃)with a relative density of 97%.By inserting the PLD seed layer with the thickness of 3μm,robust electrolyte films were successfully fabricated on La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3)(LSCF)substrate.The SDC film growing at a substrate temperature of 650℃with thermal treatment and oxygen gas pressure of 10 Pa has high ionic conductivity of 0.075 S·cm^(-1) at 800℃.The results demonstrate that the dense SDC thin films prepared by PLD are suitable for low-temperature SOFC applications.展开更多
基金the grants received from the Science and Engineering Research Board(SERB),New Delhi(SR/S3/ME/0024/2011,dated 3rd July 2012)。
文摘Zirconia(ZrO_2)incorporated ceramic coatings were fabricated on biodegradable ZM21 Mg alloy by the PEO coupled with EPD process.Subsequently,the sample surface was modified by laser texturing to improve the corrosion resistance,roughness and cell proliferation and growth properties.The corrosion performance of the fabricated samples along with the substrate was studied by electrochemical measurements under simulated body fluid(SBF)environment.The cell direct contact assay was conducted for the substrate and fabricated samples using L-929 mouse fibroblast cells for 24 h.The phase contrast images of cell direct contact assay revealed that fabricated samples exhibited better contact and response with the fibroblast cells,compared to the substrate.The addition of nanoparticles in the PEO process,called PEO coupled EPD process,resulted in attaining a higher thickness and improved corrosion performance of the samples than the PEO coated samples.Among all the samples,laser surface textured PEO,and PEO-EPD coated samples unveiled enhanced corrosion resistance,cell growth,thereby enabling it as a suitable prototype for biodegradable implant applications.
基金financially supported by the National Natural Science Foundation of China(No.50902069)the Natural Science Foundation of Jiangsu Province(No.BK2012806)the Fundamental Research Funds for the Central Universities(No.30920130111022)。
文摘The cubic fluorite structure Sm_(0.2)Ce_(0.8)O_(1.9)(SDC)film was fabricated by pulsed laser deposition(PLD)to be used as electrolyte for solid oxide fuel cells(SOFCs).The SDC target was prepared by co-precipitation process at a low sintering temperature(1,250℃)with a relative density of 97%.By inserting the PLD seed layer with the thickness of 3μm,robust electrolyte films were successfully fabricated on La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3)(LSCF)substrate.The SDC film growing at a substrate temperature of 650℃with thermal treatment and oxygen gas pressure of 10 Pa has high ionic conductivity of 0.075 S·cm^(-1) at 800℃.The results demonstrate that the dense SDC thin films prepared by PLD are suitable for low-temperature SOFC applications.
