Effect of boron inclusion in SiOC polymer derived matrix on the mechanical and oxidation resistance properties of fiber reinforced composites

• Published in: Materials chemistry and physics 2018-02, Vol.205, p.269-277
• Main Authors: Vijay, Vipin, Siva, Subramania, Sreejith, K.J., Prabhakaran, P.V., Devasia, Renjith
• Format: Article
• Language: English
• Subjects: Boron; Boron fibers; Ceramic fibers; Ceramic matrix composite; Ceramic matrix composites; Ceramics; Fiber composites; Fiber reinforced polymers; Flexural strength; Impact analysis; Nicalon (trademark); Oxidation; Oxidation resistance; Polyborosiloxanes; Polymer matrix composites; SiC/SiBOC; Silicon carbide; Studies
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/j.matchemphys.2017.11.010

Effect of boron inclusion in SiOC polymer derived matrix on the mechanical and oxidation resistance properties of fiber reinforced composites was investigated. SiC/SiBOC ceramic matrix composites were fabricated using Nicalon and Sylramic silicon carbide fibers and polyborosiloxane as the matrix resin. Oxidation behaviour of SiC/SiBOC at 1000 °C was compared with that of C/C and C/SiBOC composites. Flexural strengths of the composites were evaluated before oxidation and after regular intervals of oxidation. The results indicate that the type of silicon carbide reinforcement plays a crucial role in the oxidation behaviour and flexural property of SiC/SiBOC ceramic matrix composites. After six PIP cycles, Nicalon/SiBOC composite showed a maximum flexural strength value of 108 MPa and a corresponding density of ∼2 g/cc. Sylramic/SiBOC composite exhibited a maximum average flexural strength value of 88Mpa after first PIP cycle and a maximum density of ∼2 g/cc after 6th PIP cycle. SiC/SiBOC composites exhibit superior oxidation resistance at 1000 °C, compared to C/C and C/SiBOC composites. From the results, it was concluded that SiC/SiBOC ceramic matrix composites can be used as structural materials under oxidative atmosphere where stress levels are low. •SiC/SiBOC composites were fabricated by Polymer Infiltration and Pyrolysis method.•Density and Flexural property of composites were evaluated after six PIP cycles.•Oxidation resistance of SiC/SiBOC, C/SiBOC & C/C at 1000 °C were evaluated.•SiC/SiBOC composites exhibited superior oxidation resistance at 1000 °C.