| Autor: |
Lysenkov, A S, Ivicheva, S N, Titov, D D, Kargin, Yu F, Kim, K A, Frolova, M G, Petrakova, N V, Leontiev, V G, Tomkovich, M V, Perevislov, S N, Melnikova, I S, Danilin, K D |
| Zdroj: |
IOP Conference Series: Materials Science and Engineering; April 2019, Vol. 525 Issue: 1 p012080-012080, 1p |
| Abstrakt: |
The aim of this work was to obtain Si3N4/SiC composites, where silicon nitride served as the matrix, and the silicon carbide content varied from 3 to 50wt.%. To reduce the sintering temperature (hot pressing) of the ceramic, it is used a sintering additive of calcium aluminate eutectic. The charge was prepared as follows: the silicon nitride powder was mixed with 10 wt.% sintering calcium aluminates, then the charge was added over 100 % of silicon carbide in an amount of 3, 5, 7, 10, 15, 20 and 50 wt.% in a planetary mill. Ceramic materials were hot pressed at 1660degC, the pressure was 30 MPa for 60 minutes in N2 atmosphere. The 10 wt.% SiC composite has highest properties: 3.16 g/cm3 density, 650 MPa bending strength, 22 GPa microhardness. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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