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The hot corrosion behaviour was investigated for pack-cemented Si-modified aluminide coating on the K438 Ni-base alloy when covered by NaCl, Na2SO4, and 50% NaCl +50% Na2SO4 (mass fractions) at 1050 °C in air. The primary aim of this work was to add NaCl and Na2SO4 only once to the surface of coating to study the effect on the subsequent and long-term hot corrosion behaviour of coating. After 120 h hot corrosion, covered by NaCl and 50% NaCl +50% Na2SO4 (mass fractions) for the coating, generated the maximum and minimum oxides spallation per unit area, respectively. Combined-effect of NaCl and Na2SO4 decreases oxides spallation.

Lithium–sulfur (Li–S) batteries are attractive due to the overwhelming advantage of theoretical energy density and low sulfur cost. Preventing the shuttle of polysulfides and maintaining the high sulfur content are two of the primary challenges. 3D sulfur doped graphene (S-3DG) not only promises enough space to accommodate sulfur, but also increases the binding of polysulfides intermediates through chemical bonding. However, strategies for constructing sulfur doped 3D sulfur/graphene (S-3DG/S) are either complex or involve toxic reagents. The sulfur–containing decolorizer (NaHSO3) as heteroatom doping source as well as reducer is utilized in synthesis S-3DG/S for lithium sulfur batteries via one-pot method. The results show that sulfur is successfully introduced into the 3DG/S framework with S-doped content of 1.8 wt%. The S-3DG/S composites with high loading (80 wt%) of sulfur deliver a high capacity retention of 93.9% after 100 cycles and demonstrate a low capacity-decay rate of 0.085% per cycle after 350 cycles at 0.5 C rate. This low-cost and scalable method paves a novel way to the practical application of Li–S batteries.

We report on an abnormal element distribution in silicate glass, induced by 300 kHz, 1030 nm fs laser irradiation. Chemical analysis has taken on the cross section of the laser tracks and also along the writing direction. Energy-dispersive X-ray, wavelength-dispersive spectroscopy and nuclear microprobe demonstrates that no elemental migration occurred after femtosecond laser irradiation, which is quite different from the previous results. The possible mechanism is also briefly discussed.

The phase relations in the Ag–Zr–Y ternary system at 1023 K have been studied by means of diffusion-triple and EPMA technique. The tie-lines for two-phase equilibrium were drawn and tie-triangles for three-phase equilibrium were estimated. Then the isothermal section of the Ag–Zr–Y ternary system at 1023 K has been established, which consists of 6 three-phase fields. No ternary compounds are observed. Furthermore, the nucleation and/or growth of AgZr 2 benefits from Ag 51 Y 14 .