Influence of boron nitride nanotubes on the damage evolution of SiCf/SiC composites

The tensile damage behavior of SiCf/SiC–B4C after oxidation in wet atmosphere based on acoustic emission pattern recognition

“…Some researchers think that these signal parameters only represent one particular damage mechanism. 15 Nevertheless, the overlap of AE parameter distributions due to signal attenuation, close-range transmission from different sources, device settings, and large data sets makes it difficult to accurately distinguish AE signals. Thus, to improve the identification of damage modes, the statistic multivariate analysis such as pattern recognition (PR) is necessary to be applied for the analysis of AE parameters.…”

“…For SiC f /SiC–B 4 C composites, a single damage behavior, such as microcracks, fiber/matrix debondings, fiber breakage, and transverse matrix cracks, can generate a wide range of AE signal parameters. Some researchers think that these signal parameters only represent one particular damage mechanism 15 . Nevertheless, the overlap of AE parameter distributions due to signal attenuation, close‐range transmission from different sources, device settings, and large data sets makes it difficult to accurately distinguish AE signals.…”

Synthesis of macroscopic monolithic metal–organic gels for ultra-fast destruction of chemical warfare agents

“…Among them, metal-organic frameworks (MOFs) that are assembled by metal ions or clusters with organic linkers through coordination bonds have been extensively studied and have shown intriguing performances in CWA removal, due to their exceptionally large surface area, high porosity, tunable textural and chemical properties, and their abundant catalytic sites. [3][4][5] In particular, Zr-based metal-organic frameworks (Zr-MOFs) have attracted great research attention as potential heterogeneous catalysts, due to their easy and numerous synthetic methods, 6 and their exceptionally high thermal, chemical and mechanical stabilities. 7 Meanwhile, it has been demonstrated that Zr-MOFs such as MOF-808, PCN-777, NU-1000 and UiO-66-NH 2 have unprecedented catalytic degradation rates for nerve agents with half-lives of less than 0.5 min.…”

Large‐scale synthesis and growth mechanism of boron nitride nanocomposite assembled by nanosheets and nanotubes

“…Recently, incorporating nanostructured boron nitride into advanced ceramic matrix composites has become a cutting‐edge research area. BNNTs have been used to improve the bending strength and fracture toughness of alumina, 4,5 silicon nitride, 6,7 zirconia, 8,9 and silicon carbide 10,11 ceramics, and the elastic modulus, hardness, and wear resistance of bioactive ceramics 12 . Their strengthening and toughening mechanisms mainly include grain refinement, bridging, pull‐out, necking and fracture of BNNTs, as well as strong bonding between BNNTs and the ceramic matrix.…”