Liquid-infused superhydrophobic dendritic silver matrix: A bio-inspired strategy to prohibit biofouling on titanium

Static-gap, single-spark tests were used to investigate the arc erosion behavior of newly developed silicon carbide and alumina particle reinforced silver matrix composites (SiCp/Ag, Al2O3p/Ag). Craters and hills exist on the surfaces of eroded silver matrix composites, and their depths and sizes decrease as the particle content increases and the particle size decreases. Obvious melting, flow, severe splash of molten silver, and the segregation of particles are present on the surfaces of eroded composites containing low volume percents of large particles. Easier silver flow results in smooth surfaces and reduces the total surface areas of the eroded composites containing large particles. The flow and splash of silver decreased with increasing particle content and decreasing particle size, exhibiting a better erosion resistance to single-spark tests. The static-gap, single-spark erosion behavior of silver matrix composites is dominated by the flow and splash of molten composites. A high viscosity of the liquids provides the composites a good arc erosion resistance.

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Electroless Coating of Silver on Multiwall Carbon Nanotubes

Materials Science Forum ◽

10.4028/www.scientific.net/msf.710.774 ◽

2012 ◽

Vol 710 ◽

pp. 774-779

Author(s):

Niraj Nayan ◽

S.V.S. Narayana Murty ◽

S.C. Sharma ◽

K. Sreekumar ◽

Parameshwar Prasad Sinha

Keyword(s):

Carbon Nanotubes ◽

Surface Modification ◽

Multiwall Carbon Nanotubes ◽

Activation Process ◽

Multiwall Carbon Nanotube ◽

Effective Utilization ◽

Electroless Coating ◽

Silver Matrix ◽

Electrical Brush ◽

Multiwall Carbon

Silver reinforced with carbon nanotubes, instead of graphite, would increase both the electrical conductivity, hardness and wear resistance of the electrical brush materials. The effective utilization of carbon nanotubes in the Ag/CNT composite depends strongly on its uniform distribution and strong interfacial adhesion to the silver matrix and thus demands for its surface modification. In order to carry out the surface modification of carbon nanotubes, electroless coating was given to them after liquid phase oxidation, sensitization and activation process. The room-temperature chemical treatment results in a nominally complete coating over the entire outer surface of multiwall carbon nanotube. The surface morphology of the carbon nanotubes after each step has been studied using TGA, DSC, XRD, FTIR and SEM.

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CNT Reinforced Silver Nanocomposites: Mechanical and Electrical Studies

Journal of Materials ◽

10.1155/2016/8629206 ◽

2016 ◽

Vol 2016 ◽

pp. 1-6 ◽

Cited By ~ 2

Author(s):

Dinesh Kumar ◽

Sonia Nain ◽

Neena ◽

Hemant Pal ◽

Ravi Kumar

Keyword(s):

Carbon Nanotubes ◽

Electrical Conductivity ◽

Elastic Modulus ◽

Multiwalled Carbon Nanotubes ◽

Multiwalled Carbon ◽

Electrical Studies ◽

Silver Nanocomposites ◽

Silver Matrix ◽

Nanoindentation Hardness

Nanoindentation hardness and elastic modulus of the silver/MWCNT (multiwalled carbon nanotubes) composites, fabricated by modified wet mixing technique, are studied in the present work. CNT reinforced silver nanocomposites, fabricated by introducing 4.5 volume percentages of CNT in the silver matrix, have increased elastic modulus and approximately 50% higher hardness than pure nanosilver. It is also observed from the results that the electrical conductivity of the fabricated materials was decreased by increasing the CNTs volume %.

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