Method for producing porous tantalum sinters from tantalum based tantalum alloys or composites in the process of magnesium dealloying

摘要

the subject of the invention is a way to produce porous tantalum sinter (based on tantalum, tantalum alloys and composites based tantalowej) by thermal process odstopowania magnesium.method of manufacturing porous sinter tantalum alloy.tantalum or composites based tantalowej in process odstopowania magnesium is characterized by the fact that tantalum powders and possible other additives and magnesium alloy (ti, nb, zr, mo, fe, v, w),the proportions of the density or volume of 10 - 50 mas.% mg, preferably 30 mass% mg, is subjected to mechanical process synthesis in a protective atmosphere of argon controlled oxygen content and water level. 1 ppmwith a ratio of weight to minimum weight mielniku00f3w powder 10, preferably 20, during the 5 - 20 hours, preferably for 8 hoursthen the alloy powder is pressed under a pressure of 500 - 1000 mpa, preferably 1000 mpa.then wypraski undergo spiekaniu while process odstopowania in temperature above boiling temperature magnesium, 1200 - 2000u00b0c, favourably 1800u00b0c within 1 to 10 hours.positive 4 hours in a vacuum; then cooling sinters with stove.