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(11) | EP 2 343 142 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Powder metallurgical composition and process for manufacturing nanofiber reinforced powder metallurgy product from the same |
(57) According to the invention a powder metallurgical powder composition is provided
that comprises as a base material non-agglomerating metallic and/or metal oxide and/or
metal carbide grains with a mean grain size of 0.01-5 mm and a high melting point
lubricant admixed to the base material in powdery form in the amount of 0.01-10% calculated
per unit mass of the base material. The melting temperature of said high melting point
lubricant is at least 550 degrees Celsius, but lower than the melting temperature
of the grains that have the lowest melting temperature in the base material. The high
melting point lubricant comprises as a major component inorganic silica (SiO2) and additionally at least one further oxide selected from the group of inorganic
alkali metal oxides, inorganic alkali-earth metal oxides and inorganic semimetal oxides
differing from silica.
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