Abstract: A method of making a charge dissipative surface of a dielectric polymeric material with tunable (selectable) surface resistivity, comprises the step of controllably carbonizing the surface of the polymeric material in a vacuum environment by bombarding the polymeric surface with an ion beam of rare gas ions, the energy level of the ion source being from 2.5 to 30 keV, in the fluence range 1E16-5E17 ion/cm2 so as to reach a surface resistivity in the static dissipative range of 1E6 to 1E9 ohm/square at room temperature, with a temperature dependence of less than three orders of magnitude between ?150° C. and +150° C., while having no impact on the RF performance of the material, with high RF power handling capability, and with tunable thermo-optical properties of the surface, including negligible impact on the thermo-optical properties and RF performance of the material, if required by applications.

Abstract: A method of making a charge dissipative surface of a dielectric polymeric material with tunable (selectable) surface resistivity, comprises the step of controllably carbonizing the surface of the polymeric material in a vacuum environment by bombarding the polymeric surface with an ion beam of rare gas ions, the energy level of the ion source being from 2.5 to 30 keV, in the fluence range 1E16-5E17 ion/cm2 so as to reach a surface resistivity in the static dissipative range of 1E6 to 1E9 ohm/square at room temperature, with a temperature dependence of less than three orders of magnitude between ?150° C. and +150° C., while having no impact on the RF performance of the material, with high RF power handling capability, and with tunable thermo-optical properties of the surface, including negligible impact on the thermo-optical properties and RF performance of the material, if required by applications.

Abstract: A method of making a charge dissipative surface of a polymeric material with low temperature dependence of the tunable surface resistivity, comprises the step of controllably carbonizing the surface of the polymeric material in a vacuum environment by bombarding the polymeric surface with an ion beam of rare gas ions, the energy level of the ion source being from low to moderate so as to reach a surface resistivity in the static dissipative range while having negligible impact on the RF transparency of the material and with tunable thermo-optical properties of the surface, including negligible impact on the thermo-optical properties.

Abstract: A method of preparing a protective material is shown. In one aspect the method includes the steps of providing a powder mixture of solid particles having a size in the range of colloidal up to 100 &mgr;m. The particles have a ceramic or mineral composition. Then a liquid is provided to form an external phase of a suspension when mixed with the powder, to yield a solids volume concentrating greater then 0.5. The solid powder liquid mixture forms a thixotropic-dilatant liquid material. The rheological curve of the TDLM is adjusted to suit the application, resulting in thixotropic properties at low strain rates and dilatant properties at higher strain rates to yield a material that solidifies upon impact. The rheological curve is adjusted by one or more of additives, material composition and gravity mixing. In another aspect protective articles made from TDLM are provided.

Abstract: A device for ultrasonic peening of metals is intended for strengthening and relaxation treatment of metal surfaces with an ultrasonic oscillation and includes an ultrasonic generator (1) having the optimized power of from 0.2 to 0.5 kW, a piezoelectric transducer with an ultrasonic velocity transformer (6) and a set of readily replaceable heads with striking tools (pins). Various sizes and arrangements of the tools allow for ultrasonic peening of parts of complicated configuration fast and efficiently. In the device, drop-wise cooling and lubrication of striking tools, as well as of treatment area are provided.

Abstract: A device for ultrasonic peening of metals is intended for strengthening and relaxation treatment of metal surfaces with an ultrasonic oscillation and includes an ultrasonic generator (1) having the optimized power of from 0.2 to 0.5 kW, a piezoelectric transducer with an ultrasonic velocity transformer (6) and a set of readily replaceable heads with striking tools (pins). Various sizes and arrangements of the tools allow for ultrasonic peening of parts of complicated configuration fast and efficiently. In the device, drop-wise cooling and lubrication of striking tools, as well as of treatment area are provided.