High-temperature properties and associated structure evolution of continuous SiNO fiber-reinforced BN composites for wave transparency

Fabrication and properties of borazine derived boron nitride matrix wave-transparent composites reinforced by 2.5 dimensional fabric of Si–N–O fibers

“…In our previous work [18,19] The borazine infiltration and pyrolysis approach also possesses several advantages over conventional hot-pressing [20] and CVI [21] methods, such as easy processing, moderate fabrication temperature and high purity of BN matrix [22][23][24]. In the present investigation, to better evaluate the application potential of the Si-N-O f /BN composites, and then purified according to our previous work [25].…”

Three‐dimensional measurement and cohesive element modelling of deformation and damage in a 2.5‐dimensional woven ceramic matrix composite

“…The gradients of displacement in both the vertical and horizontal directions were assessed over a distance of 3.5 mm about the crack as the load was increased, which effectively measures the average strains applied to the region where the crack developed. The data for several cracks (1)(2)(3)(4) are presented in Fig. 7c; in each case, the ratio of vertical to horizontal strain is similar (1.0 ± 0.3), increasing sharply with increasing compressive vertical strain as the horizontal strain exceeds a critical value, ε crit , of approximately 0.001.…”

“…Continuous fibre‐reinforced ceramic quasi‐brittle composites are promising candidate materials for structural and functional applications at high temperatures. For example, fibre‐reinforced SiC–SiC composites have been proposed in fusion and advanced fission power reactors and SiNO fibre‐reinforced boron nitride (SiNO‐BN) composites are potential high‐temperature materials with transparency to electromagnetic radiation . There is a need to assess the mechanical integrity of these quasi‐brittle materials and to predict their performance under different states of loading.…”

“…For example, fibre-reinforced SiC-SiC composites have been proposed in fusion and advanced fission power reactors 1,2 and SiNO fibre-reinforced boron nitride (SiNO-BN) composites are potential high-temperature materials with transparency to electromagnetic radiation. [3][4][5] There is a need to assess the mechanical integrity of these quasibrittle materials and to predict their performance under different states of loading. Continuum mechanics methods can be inadequate, as they may not take into account the effects of the heterogeneous fabric architecture on the strain distribution that develops within the composite microstructure.…”

Finite element simulation and analysis of the dielectric properties of unidirectional aramid/epoxy composites

“…In recent years, aramid fiber reinforced resin composites have been widely used as electromagnetic and lightweight functional materials because of their outstanding mechanical and dielectric performances . Wave‐transmitting material is one of the most common used forms of aramid/epoxy composites .…”