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Low‐Cost Silicon Nitride from β‐Silicon Nitride Powder and by Low‐Temperature Sintering
Author(s) -
Kondo Naoki,
Hotta Mikinori,
Ohji Tatsuki
Publication year - 2013
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12157
Subject(s) - sintering , materials science , silicon nitride , raw material , nitride , silicon , metallurgy , nitrogen , composite material , layer (electronics) , chemistry , physics , organic chemistry , quantum mechanics
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% Y 2 O 3 and 5 wt% MgAl 2 O 4 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 m 1/2 , respectively. The results indicate that the low‐temperature sintering of the low‐cost β powder has a potential to reduce cost of components.