A composition based on a certain chromium-free silicate-based binder is described. The composition is an aqueous solution of lithium-doped potassium silicate in combination with an aluminum or aluminum alloy powder, zinc powder or a combination thereof. The coatings of the present invention are capable of achieving a full cure at temperatures as low as 350-450 degrees F. by the inclusion of a colloidal solution of a nano-sized ceria, thus making the coatings especially suitable for application on temperature sensitive base materials.

A composition based on a certain chromium-free silicate-based binder is described. The composition is an aqueous solution of lithium-doped potassium silicate in combination with an aluminum or aluminum alloy powder, zinc powder or a combination thereof. The coatings of the present invention are capable of achieving a full cure at temperatures as low as 350-450 degrees F. by the inclusion of a colloidal solution of a nano-sized ceria, thus making the coatings especially suitable for application on temperature sensitive base materials.

The present disclosure provides a heat shield. The heat shield may comprise a first layer comprising a first material, a second layer radially outward of the first layer comprising a second material, and a third layer radially outward of the second layer comprising a third material, wherein the first layer is coupled to the second layer by at least one post and at least one support extending from a radially outer surface of the first layer.

The present disclosure provides a heat shield. The heat shield may comprise a first layer comprising a first material, a second layer radially outward of the first layer comprising a second material, and a third layer radially outward of the second layer comprising a third material, wherein the first layer is coupled to the second layer by at least one post and at least one support extending from a radially outer surface of the first layer.

A method of preparing a composite preform includes applying a tacky preceramic-polymer-based adhesive on a first fiber array arranging a second fiber array on the first fiber array, the adhesive holding the first and second fiber arrays together. A composite component is also disclosed.

A method of preparing a composite preform includes applying a tacky preceramic-polymer-based adhesive on a first fiber array arranging a second fiber array on the first fiber array, the adhesive holding the first and second fiber arrays together. A composite component is also disclosed.

A black ceramic composite coating is presented. The ceramic composite coating comprises a ceramic matrix having embedded therein carbide nanoparticles (in particular metal carbide nanoparticles) and/or metal-carbon composite nanoparticles (with separate metal and carbon phases) embedded therein. The carbide nanoparticles are metastable and the metal-carbon composite nanoparticles are decay products of the metastable carbide nanoparticles. A further aspect of the invention relates to producing such a ceramic composite coating.

A black ceramic composite coating is presented. The ceramic composite coating comprises a ceramic matrix having embedded therein carbide nanoparticles (in particular metal carbide nanoparticles) and/or metal-carbon composite nanoparticles (with separate metal and carbon phases) embedded therein. The carbide nanoparticles are metastable and the metal-carbon composite nanoparticles are decay products of the metastable carbide nanoparticles. A further aspect of the invention relates to producing such a ceramic composite coating.

A method for preparing an infrared radiation ceramic material includes mixing and ball milling raw materials of Fe.sub.2O.sub.3, MnO.sub.2 and CuO in a mass ratio to obtain a mixed powder; pressing the mixed powder; adjusting laser spot, laser power and laser sintering time of a laser; irradiating or sintering by a first laser the pressed mixed powder in a crucible for a high-temperature solid-phase reaction to obtain an AB.sub.2O.sub.4 type ferrite powder; obtaining a first mixture by mixing the AB.sub.2O.sub.4 type ferrite powder and a cordierite powder in a mass ratio; adding a sintering aid and a nucleating agent for ball milling; obtaining a second mixture by mixing the first mixture and a binder for aging; pressing the second mixture; and irradiating or sintering the pressed second mixture by a second laser to obtain the infrared radiation ceramic material.

An anode for a direct current electric arc furnace includes dry vibratable monolithic refractory material positioned on a bottom wall of the furnace, a plurality of steel pins extending upward from the bottom wall of the furnace and through the dry vibratable monolithic refractory material, and an anode cap positioned on top of the dry vibratable monolithic refractory material. The steel pins are surrounded by the dry vibratable monolithic refractory material. The anode cap includes a plurality of pin holes formed therein with which the steel pins correspond and through which the steel pins extend.