Processing and characterization of fine-grained monolithic SiC ceramic synthesized by spark plasma sintering
Processing and characterization of fine-grained monolithic SiC ceramic synthesized by spark plasma sintering
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DOI：
10.1016/j.msea.2009.12.027
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发表时间：
2010-03
期刊：
影响因子：
6.4
通讯作者：
Zhao-Hui Zhang;Fu-chi Wang;Jie Luo;Shu-Kui Lee;Lu Wang
中科院分区：
文献类型：
--
作者：
Zhao-Hui Zhang;Fu-chi Wang;Jie Luo;Shu-Kui Lee;Lu Wang
采用放电等离子烧结（SPS）技术，以颗粒状碳化硅（SiC）粉末为原料，制备了具有良好力学性能的SiC陶瓷。研究了不同烧结温度下陶瓷的显微结构和力学性能。结果表明，在1860°C烧结的SiC陶瓷的相对密度为98.5%，显微硬度为28.5GPa，抗弯强度为395 MPa，断裂韧性为4.5MPam1/2。通过比较发现，由于本发明的SiC陶瓷具有细晶的微观结构，并且在烧结过程中使用了颗粒化的SiC粉末，所以SPS合成的SiC陶瓷的力学性能远优于普通烧结方法制备的SiC陶瓷。
Monolithic silicon carbide (SiC) ceramic with good mechanical properties was synthesized by spark plasma sintering (SPS) technique, using granulated SiC powders. The microstructures and the mechanical properties of the ceramics sintered at different temperature were investigated. The results reveal that the SiC ceramic sintered at 1860°C has relative density of 98.5%, micro-Vickers hardness of 28.5GPa, bending strength of 395MPa, and fracture toughness of 4.5MPam1/2. By comparison, due to the present SiC ceramic exhibits fine-grained microstructures and the granulated SiC powders was used during the sintering process, the mechanical properties of the SiC ceramic synthesized by SPS are much better than that prepared by common sintering methods.