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KERAMISCHER SINTERFORMKÖRPER AUS EINEM SIALON-WERKSTOFF, SEINE ROHSTOFFMISCHUNG UND HERSTELLUNG
The present invention relates to a sintered body which is based on β-sialon as well as 15R-sialon and which, as a cutting material, exhibits a high cutting performance compared to workpieces made of nickel-based alloy or Heat Resistant Super Alloys (HRSA). To this end, a ceramic sintered body is disclosed which has a sialon phase and an amorphous or semi-crystalline grain boundary phase. The sialon phase has a proportion of 20 - 80 wt.% 15R-sialon polytypoid. The amorphous or semi-crystalline grain boundary phase optionally comprises a Yb-Al garnet, and constitutes up to 15 wt.% of the total sintered body. The sintered body is manufactured from an inorganic raw material mixture which comprises 40 to 57 wt.% of Si3N4; 40 - 55 wt.% of a mixture of AlN and Al2O3, the ratio of Al2O3 to AlN being in the range of 1-1.5:1, and 3 to 5 wt.% of Yb2O3 as a sintering aid.
KERAMISCHER SINTERFORMKÖRPER AUS EINEM SIALON-WERKSTOFF, SEINE ROHSTOFFMISCHUNG UND HERSTELLUNG
The present invention relates to a sintered body which is based on β-sialon as well as 15R-sialon and which, as a cutting material, exhibits a high cutting performance compared to workpieces made of nickel-based alloy or Heat Resistant Super Alloys (HRSA). To this end, a ceramic sintered body is disclosed which has a sialon phase and an amorphous or semi-crystalline grain boundary phase. The sialon phase has a proportion of 20 - 80 wt.% 15R-sialon polytypoid. The amorphous or semi-crystalline grain boundary phase optionally comprises a Yb-Al garnet, and constitutes up to 15 wt.% of the total sintered body. The sintered body is manufactured from an inorganic raw material mixture which comprises 40 to 57 wt.% of Si3N4; 40 - 55 wt.% of a mixture of AlN and Al2O3, the ratio of Al2O3 to AlN being in the range of 1-1.5:1, and 3 to 5 wt.% of Yb2O3 as a sintering aid.
KERAMISCHER SINTERFORMKÖRPER AUS EINEM SIALON-WERKSTOFF, SEINE ROHSTOFFMISCHUNG UND HERSTELLUNG
CERAMIC SINTERED BODY MADE OF A SIALON MATERIAL, RAW MATERIAL MIXTURE THEREOF, AND MANUFACTURE THEREOF
CORPS FRITTÉ EN CÉRAMIQUE CONSTITUÉ D'UN MATÉRIAU SIALON, MÉLANGE DE MATIÈRES PREMIÈRES DE CELUI-CI ET SA FABRICATION
NEMRAVA SANDRA (Autor:in) / DIETRICH VOLKER (Autor:in) / STAHL MORITZ (Autor:in)
29.01.2025
Patent
Elektronische Ressource
Deutsch
KERAMISCHER SINTERFORMKÖRPER AUS EINEM SIALON-WERKSTOFF, SEINE ROHSTOFFMISCHUNG UND HERSTELLUNG
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