In this research, carbon sources (Resin Phenolic, Carbon Black and Graphite) and Boron Carbide (B₄C) were used to improve the mechanical properties of Silicon Carbide (SiC) composite. For this purpose, carbon sources of 0.5, 0.75, 1, 1.5, 2, 2.5, 3, and 5 wt% as well as 0.5 wt% B₄C were added to SiC powder, respectively. The sample containing SiC—2.5 wt% Resin Phenolic—0.5 wt% B₄C had the best properties with relative density, hardness, and fracture toughness values of 98.5%, 2820 GPa, and 3.9 MPa.√m, respectively. Examination of SEM images showed that by increasing carbon from 0.5 to 2.5 wt%, the fracture changes from intergranular to transgranular.

中文翻译：

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通过无压烧结生产的具有不同碳添加剂的SiC-C-B4C复合材料的机械性能

在这项研究中，碳源（树脂酚醛，炭黑和石墨）和碳化硼（B ₄ C）被用于改善碳化硅（SiC）复合材料的机械性能。为此，将0.5、0.75、1、1.5、2、2.5、3和5重量％的碳源以及0.5重量％的B ₄ C分别添加到SiC粉末中。含有SiC-2.5 wt％树脂酚-0.5 wt％B ₄ C的样品具有最佳性能，相对密度，硬度和断裂韧性分别为98.5％，2820 GPa和3.9MPa.√m。SEM图像的检查表明，通过将碳从0.5wt％增加到2.5wt％，断裂从晶间改变为跨晶。