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Mechanical properties of SiC‐C‐B 4 C composites with different carbon additives produced by pressureless sintering
Author(s) -
Salmany Kozekanan Behnam,
Moradkhani Alireza,
Baharvandi Hamidreza,
Ehsani Naser
Publication year - 2021
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.13686
Subject(s) - materials science , transgranular fracture , boron carbide , fracture toughness , carbon black , sintering , composite material , graphite , silicon carbide , relative density , carbon fibers , composite number , intergranular corrosion , chromium carbide , intergranular fracture , carbide , microstructure , natural rubber
In this research, carbon sources (Resin Phenolic, Carbon Black and Graphite) and Boron Carbide (B 4 C) 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% B 4 C were added to SiC powder, respectively. The sample containing SiC—2.5 wt% Resin Phenolic—0.5 wt% B 4 C 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.
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