The effect of fibre content on properties of ceramifiable composites

Abstract

With the development of rocket and aerospace technology in recent decades, people have put forward higher requirements on the heat resistance and ablation performance of thermal protection materials. In this paper, zirconia fibre hybrid alumina fibre/boron phenolic (ZA/ BPF) ceramifiable composites, based on ceramic fillers of MgO, Al 2 O 3 , SiC and mica-modified boron phenolic resin matrix, were prepared with different hybrid fibre contents (5, 10, 15, 20, 25, 30 wt-%) by hot compression moulding. The result shows that fibre contents have little effect on the ablation resistance of composite materials which all have a low linear ablation rate below 0. 01 mm s −1 . When the fiber content is 25%, the ZA/BPF composite reaches the highest bending strength 48. 86 MPa and 15. 57 MPa before and after sintering respectively. It is showed by the SEM results that too high and too low fibre content would both lead to poor bonding between resin and fibre interfaces.

Thermal Stability, Mechanical Properties and Ceramization Mechanism of Epoxy Resin/Kaolin/Quartz Fiber Ceramifiable Composites

“…In recent years, ceramifiable polymer composite materials have been widely used in the field of thermal protection system due to their excellent ablation resistance and low cost [18][19][20]. Ceramifiable polymer composites are able to maintain their strength and morphology after ablation due to the addition of high-performance ceramic fillers, which can sinter at high temperatures.…”

Interaction Between Type I and II Coagents and Polybutadiene Isomers on Crosslinking Systems Using Organic Peroxide

“…The cured system improves physical properties compared to uncured rubber. [2] Currently, two main curing systems are used worldwide: the sulfur system combined with activators and accelerators and organic peroxides, which can be associated with coagents. [3] According to Liu et al, [4] the main difference is the formation of polysulfides (C-S) in the sulfur process, which provides excellent mechanical properties, high flexibility, and elongation.…”

Decomposition mechanism of boron phenolic resin composites under temperature gradient

“…Phenolic resin has been the main matrix for ablative material owning to its brilliant mechanical properties, high residual rate and excellent heat resistance [11, 12]. As a consequence, phenolic resin represents the ideal matrix of ablative material [13, 14]. However, defects of virgin phenolic resin impede its applications in the demanding aerospace field.…”