The invention relates to nickel-coated hexagonal boron nitride nanosheet composite powder, its preparation and high-performance composite ceramic cutting tool material. The composite powder has a core-shell structure with BNNS as the core and Ni as the shell. The self-lubricating ceramic cutting tool material is prepared by wet ball milling mixing and vacuum hot-pressing sintering with a phase alumina as the matrix, tungsten-titanium carbide as the reinforcing phase, nickel-coated hexagonal boron nitride nanosheet composite powder as the solid lubricant and magnesium oxide and yttrium oxide as the sintering aids. The invention also provides preparation methods of the nickel-coated hexagonal boron nitride nanosheet composite powder and the self-lubricating ceramic cutting tool material.

Articles prepared by additive manufacturing of preforms that are coated by electrodeposition of nanolaminate materials, and methods of their production are described.

Articles prepared by additive manufacturing of preforms that are coated by electrodeposition of nanolaminate materials, and methods of their production are described.

Provided is a metal-containing particle which can be bonded to another particle or another member by melting a tip of a protrusion in the metal-containing particle at a relatively low temperature and solidifying the melt after melting, enhance connection reliability, suppress an ion migration phenomenon, and enhance insulation reliability. The metal-containing particle according to the present invention is a metal-containing particle, an outer surface of which has a plurality of protrusions, in which the metal-containing particle includes a base particle, a metal section which is disposed on a surface of the base particle, an outer surface of the metal section having a plurality of protrusions, and a metal film covering the outer surface of the metal section, and a tip of the protrusion in the metal-containing particle is meltable at 400 C. or less.

The present disclosure relates to an oxidation-resistant and/or corrosion-resistant hybrid structure including a metal layer (thin film layer) coated on the exterior of a conductive polymer structure, and a preparation method for the hybrid structure.

Provided is a metal matrix nanocomposite comprising: (a) a metal or metal alloy as a matrix material; and (b) multiple graphene sheets that are dispersed in said matrix material, wherein said multiple graphene sheets are substantially aligned to be parallel to one another and are in an amount from 0.1% to 95% by volume based on the total nanocomposite volume; wherein the multiple graphene sheets contain single-layer or few-layer graphene sheets selected from pristine graphene, graphene oxide, reduced graphene oxide, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, doped graphene, chemically functionalized graphene, or a combination thereof and wherein the chemically functionalized graphene is not graphene oxide. The metal matrix exhibits a combination of exceptional tensile strength, modulus, thermal conductivity, and/or electrical conductivity.

A method of electroless nickel plating on surface of silicon carbide powder with a uniform and stable coating. In this method, ultrasonic assist is introduced in the pre-treatment and during plating process, and the powder particles in the liquid are dispersed and deagglomerated by the mechanical action and cavitation of the ultrasonic waves, thereby achieving a uniform dispersion of the powder in the dispersant. Furthermore, a reducing agent is slowly added during plating so as to give a more uniform and stable deposition of the coating onto the surface of the powder particles, and thus a silicon carbide core-nickel shell structure with an excellent powder dispersibility and a uniform and stable coating is produced.

Method for preparing high-strength and durable super-hydrophobic film layer on inner wall of elongated metal tube includes roughening treatment of inner wall of a metal tube, electrodepositing preparation of nickel-phosphorus alloy layer and functional coating, heat treatment, subsequent anodizing and low surface energy modification. The method greatly reduces the influence of local mass transfer resistance, and a uniform nanocrystalline film layer is electroplated under the ultrasound induction. Since only electroplating solution is filled in the tube during the preparation process, the consumption of device and raw materials is greatly reduced. Also, since silica particles are added to the electroplating solution in preparing the nanocrystalline film layer, the surface morphology can be made more uniform and denser in terms of the microscopic morphology. Nano-scale channels structures are etched, so that the super-hydrophobic inner surface can have a better ability to store air, and its water flow impact resistance is greatly enhanced.

A method for autocatalytic plating of nanoparticles on a carbon nanomaterial, the method including: providing a nanomaterial in a solution including an oxidizing agent, the solution being maintained within a first temperature range and stirring the solution for a first predetermined time period; heating the solution to reach a second temperature range, higher than the first temperature range, and stirring the solution for a second predetermined time period, shorter than the first time period, while maintaining the solution within the second temperature range; filtering and rinsing the nanomaterial; dispersing the nanomaterial in an aqueous solution including a sensitizing agent; immersing the nanomaterial in a mixture including seed particles adhering to the nanomaterial; collecting the nanomaterial; plating the nanomaterial by immersing in a plating solution including an aqueous metal source and a first aqueous reducing agent such that a metallic layer is grown on the nanomaterial from the seed particles.

Deformable porous elastic conductors and fabrication methods thereof, as well as their use in a broad range of applications including electrodes, supercapacitors, antennae, and electrocatalysts, medical devices, soft electronic devices and wearable sensors.