Effect of Y2O3 and SiO2 additions on the phase formation and properties of the hot-pressed boron carbonitride composite

Koval'chenko, M. S.; Dubovik, T. V.; Rogozinska, A. O.; Bega, M. D.; Subbotin, V. I.; Grebenok, T. P.; Portnov, O. P.

doi:10.1007/s11106-013-9469-y

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“…[6][7][8][9] However, its poor mechanical properties and sintering properties restrict its application. The incorporation of liquid-phase sintering aids, such as SiO 2 10,11 , Al 2 O 3 12,13 , ZrO 2 14 , Y 2 O 3 15 , Y 2 SiO 5 16,17 , Aluminium Nitride (AlN), 15,18 and barium aluminosilicate, 2,19,20 is an effective way to promote densification and improve the mechanical properties of h-BN ceramics.…”

Section: Introductionmentioning

confidence: 99%

Influence of sintering temperature on the crystallization and mechanical properties of BN‐MAS composites

et al. 2022

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A type of boron nitride-magnesium aluminum silicate (BN-MAS) composite ceramics was fabricated by hot-press sintering at different sintering temperatures. The relationship between the sintering temperature and microstructure was investigated by analyzing the interaction between hexagonal boron nitride (h-BN) and the MAS phase. The main MAS phase in the composite ceramics is the α-cordierite phase at a sintering temperature of 1300 • C. At temperatures above 1400 • C, the inhibitory effect of h-BN on the crystallization of the MAS system is significant, and MAS mainly exists in the form of an amorphous phase. The composite sintered at 1700 • C exhibited the highest bending strength of 218MPa. h-BN and MAS were co-enhanced. MAS can be used as an effective liquid-phase sintering aid to assist in the sintering of h-BN, whereas h-BN can absorb the fracture energy of the composite ceramics through the pull-out and bridging effect of the particles.

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