材料科学
碳化硅
烧结
微观结构
抗弯强度
碳化硼
无压烧结
复合材料
碳纤维
复合数
作者
Giuseppe Magnani,Alida Brentari,Emiliano Burresi,Giancarlo Raiteri
标识
DOI:10.1016/j.ceramint.2013.07.075
摘要
The Two-step sintering (TSS) method was applied to the pressureless sintering of commercial silicon carbide powder doped with boron and carbon. The microstructural and mechanical properties of TSS-SiC were compared to those of sintered SiC obtained with the conventional thermal cycle (CS-SiC). TSS-SiC was densified (97.7% T.D.) at 2050 °C instead of 2200 °C needed for CS-SiC (97% T.D.). Furthermore, TSS-SiC showed finer microstructure and enhanced mechanical properties. In particular, flexural strength of the TSS-SiC materials greatly increased up to 556 MPa, much higher than 341 MPa reached by CS-SiC.
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