期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 34, 期 15, 页码 4095-4098出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2014.06.006
关键词
Silicon carbide; Sintering; Microstructure; Mechanical properties; Ceramics
To date, solid-state pressureless sintering of silicon carbide powder requires sintering aids and high sintering temperature (>2100 degrees C) in order to achieve high sintered density (>95% T.D.). Two-step sintering (TSS) method can allow to set sintering temperature lower than that conventionally required. So, pressureless two-step sintering process was successfully applied for solid-state sintering (boron carbide and carbon as sintering additives) of commercial SiC powder at 1980 degrees C. Microstructure and mechanical properties of TSS-SiC were evaluated and compared to those obtained with the conventional sintering (SSiC) process performed at 2130 degrees C. TSS-SiC showed finer microstructure and higher flexural strength than SSiC with very similar density (98.4% T.D. for TSS-SiC and 98.6% T.D. for SSiC). (C) 2014 Elsevier Ltd. All rights reserved.
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