Method for increasing the surface area of ceramics, metals and composites
OwnerRajiv K. Singh, Brij M. Moudgil +2inventors
InventorsRajiv K. Singh, Brij M. Moudgil, Sanjay Behl, Deepika Bhattacharya
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Abstract
A method for increasing the surface area and roughness of metals, ceramics and composites on a micro-scale, and the surfaces themselves, is disclosed whereby a laser beam having a radiation wavelength of from UV to infrared is pulsed onto the surface of the material. The energy density of the radiation is between 0.01 to 15 J/cm.sup.2 and at least 50 pulses of radiation having duration of from 1 picosecond to 1 millisecond are used on each area. The surface structures formed are semi-periodic and are from 1/4 to several hundred microns in magnitude.
Claims17
A method for increasing the true surface area of a metal, ceramic or composite material containing metal or ceramic by producing semi-periodic surface structures of less than 200 microns in magnitude on the surface of said material, comprising the steps of:
- (A) providing a laser for producing a beam of radiation having a wavelength within the UV to infrared range, an energy density within the range of 0.01 to 15 J/cm.sup.2, and pulse durations within the range of 1 picosecond to 1 millisecond;
- (B) irradiating a single area of the surface of the material to be treated with at least 50 pulses of radiation from said laser, said radiation having an energy density of between 0.01 to 15 J/cm.sup.2, said pulses having duration of between 1 picosecond to 1 millisecond.
A method of increasing by two orders of magnitude the true surface area of a metal, ceramic or composite material containing metal or ceramic, comprising the steps of:
- (A) providing a laser for producing a beam of radiation having a wavelength within the UV to infrared range, an energy density within the range of 0.01 to 15 J/cm.sup.2, and pulse durations within the range of 1 picosecond to 1 millisecond;
- (B) irradiating a single area of the surface of the material to be treated with at least 50 pulses of radiation from said laser, said radiation having an energy density of between 0.01 to 15 J/cm.sup.2, said pulses having duration of between 1 picosecond and 1 millisecond.
Dependencies are inferred from the claim text.