397 results about "Radio frequency plasma" patented technology

The invention provides a short-flow preparation method of micro-sized spherical titanium powder, which belongs to the technical field of powder preparation. The hydrogenation-dehydrogenation technique and the radio frequency plasma body fusion spheroidization technique are integrated, and the titanium hydride powder is selected as raw material; the titanium hydride powder absorbs heat in the high-temperature plasma and quickly decomposes and dehydrogenates, and the titanium hydride power is cracked and crushed in the process of dehydrogenation to produce the micro-sized titanium powder. By using the method, the processes of the dehydrogenation and the spheroidization of the generated titanium powder are finished in one step directly through the plasma processing, and the short-flow preparation of the micro-sized spherical titanium powder is realized. The invention has the advantages that the hydrogenation-dehydrogenation technique and the radio frequency plasma fusion spheroidization technique are combined, so as to shorten the production flow, enhance the production efficiency and reduce the production cost. Simultaneously, the prepared spherical titanium power has fine and even particles, good liquidity, high sphericity and low oxygen content, thereby the requirements of technical industrial production such as the injection figuration, the gel die casting figuration, and the like are satisfied.

The invention belongs to the field of powder materials and particularly provides a method for preparing micro spherical niobium (Nb)-wolfram (W)-molybdenum (Mo)-zirconium (Zr) alloy powder. According to the method, the mechanical alloying technology is used for preparing Nb-W-Mo-Zr alloy powder, and then the radio frequency plasma spheroidization technology is used for treating the mechanical alloying alloy powder to obtain the micro spherical Nb-W-Mo-Zr alloy powder which is suitable for being used for manufacturing micro thin-wall parts in an injection forming mode, wherein the average particle diameter of the micro spherical Nb-W-Mo-Zr alloy powder is less than 20 micro meters. The method for preparing the micro spherical Nb-W-Mo-Zr alloy powder overcomes the defect that through a traditional niobium alloy powder preparation technology, only powder with particles which are in irregular shapes or have long diameters can be prepared, the average particle diameter of the prepared micro spherical Nb-W-Mo-Zr alloy powder is less than 20 micro meters, and the prepared micro spherical Nb-W-Mo-Zr alloy powder is high in degree of sphericity and good in flowability, is quite suitable for being used for manufacturing thin-wall Nb-W-Mo-Zr alloy parts in a powder metallurgy mode, is especially suitable for being used for manufacturing the thin-wall Nb-W-Mo-Zr alloy parts in the injection forming mode.