FIELD: ceramics production.
SUBSTANCE: invention relates to the production of 21R-Sialon ceramics, which are used as cutting inserts for cutting metals and in other fields during wear and impact. Powder of 21R-sialon, obtained by the method for self-propagating high-temperature synthesis, and a sintering additive in the form of a mixture of oxides Sm2O3-Al2O3 in the ratio Sm2O3:Al2O3= 26.33:73.67 mol.% is mixed in isopropanol medium in a planetary mill. From the obtained ceramic charge, blanks are formed by cold uniaxial one-sided pressing in a steel mold and then fired by hot pressing in a graphite mold using a pressure of 30 MPa and a temperature of 1650°С.
EFFECT: obtaining a material with a high level of mechanical properties, such as high Vickers microhardness, bending strength and wear resistance.
1 cl, 1 dwg, 1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF MODIFYING SIALON CERAMICS | 2023 |
|
RU2818183C1 |
| METHOD FOR PRODUCING A CERAMIC COMPOSITE BASED ON SILICON NITRIDE-TITANIUM NITRIDE | 2022 |
|
RU2784667C1 |
| METHOD OF MAKING SILICON NITRIDE CERAMIC WITH CALCIUM ALUMINATE SINTERING ADDITIVE WITH LOW MELTING | 2019 |
|
RU2734682C1 |
| METHOD OF PRODUCING HOT-PRESSED SILICON CARBIDE CERAMICS | 2023 |
|
RU2816616C1 |
| METHOD FOR OBTAINING REINFORCED COMPOSITE MATERIAL BASED ON SILICON CARBIDE | 2022 |
|
RU2795405C1 |
| METHOD FOR PRODUCING CERAMIC COMPOSITE MATERIAL BASED ON SILICON CARBIDE, REINFORCED WITH SILICON CARBIDE FIBERS | 2020 |
|
RU2744543C1 |
| METHOD OF PRODUCTION OF POROUS MATERIAL | 1999 |
|
RU2191759C2 |
| METHOD OF MAKING CERAMICS BASED ON SILICON NITRIDE - TITANIUM NITRIDE COMPOSITE | 2018 |
|
RU2697987C1 |
| SIALON-CONTAINING MATERIAL AND COMPOSITION FOR ITS PREPARATION | 2007 |
|
RU2359944C1 |
| METHOD FOR PRODUCING CERAMICS BASED ON ALUMINUM OXYNITRIDE | 2022 |
|
RU2794376C1 |
