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This study proposes a theoretical analysis model to analyse the marine riser's coupled cross-flow/in-line vortex induced vibration (VIV) under heave-induced time varying parametric vibration. Combi...

The development of high value-added products prepared by slag has been restricted by the severe damage to refractories occurring during SiO2–MgO-based slag melting. In the current study, the Al2O3–SiC–C refractories were selected to conduct static resistance tests with SiO2–MgO-based slag in air and reducing atmospheres. The results show favorable corrosion resistance but poor permeability resistance in both atmospheres. The poor permeability can be attributed to the cracking of brown fused alumina aggregates caused by volume expansion during the formation of magnesium aluminate spinel. In addition, a model of crack growth for the aggregate is proposed to illustrate the corrosion mechanism of the Al2O3–SiC–C refractories. It is indicated that the crack growth of the aggregate proceeds mainly along the normal direction based on the calculation of the radial and normal lengths of the crack.

Our previous work reported for the first time that antimony tin oxide (ATO) nanoparticles were prepared by using reduced graphene oxide aerogels (rGOA) three-dimensional network as scaffolds. In this study, we encapsulated the hybrid aerogels as a whole by conducting polyaniline (PANI) to investigate the effect of the introducing of PANI on microstructure and performance of rGOA/ATO-PANI hybrids. Characterization of the as-prepared samples were performed by scanning electron microscopy (SEM), fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), X-ray diffraction (XRD), Raman spectroscopy, ultraviolet visible near infrared spectroscopy (UV–VIS–NIR) and compressive stress. The electrochemical performances of hybrids were also investigated as well. The results showed that PANI was successfully grafted on rGOA/ATO and formed a compact film, which could further improve the conductivity of the hybrids and infrared absorption performance. The PANI had crystalline phases, and corresponding diffraction peaks were found in rGOA/ATO-PANI, which further indicated that PANI grafted on the surface of rGOA/ATO. The mechanical, electrochemical, infrared barriering performance of rGOA/ATO-PANI were improved as well.