Publisher： Blackwell Publishing
E-ISSN： 1744-7402|12|2|377-382
ISSN： 1546-542X
Source： International Journal of Applied Ceramic Technology, Vol.12, Iss.2, 2015-03, pp. : 377-382
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Abstract
Aiming to manufacture low-cost silicon nitride components, a low-cost β powder was chosen as a raw powder and low-temperature sintering at 1550–1600°C under atmospheric pressure nitrogen was carried out. The silicon nitride from β powder with 5 wt% Y2O3 and 5 wt% MgAl2O4 additives and sintered at 1600°C for 8 h was successfully densified, and it exhibited moderate strength and toughness of 553 MPa ± 22 and 3.5 MPa m1/2, respectively. The results indicate that the low-temperature sintering of the low-cost β powder has a potential to reduce cost of components.
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