The impact wear resistance of the hard coating is very important in high-temperature environment nuclear power plant. CrN and CrAlN coatings were prepared using multi-arc ion plating. abrasive was investigated at varied temperatures through a controlled kinetic energy rig, their mechanism elucidated. No extensive spalling found on surface after 104 impacts under no-sand condition. excellent ant...

Coating a MoSi2 ceramic layer on Mo substrates is an excellent strategy to enhance their oxidation resistance at elevated temperatures. Suppressing elemental interdiffusion across the Mo/MoSi2 interface very important for extending service life of substrates. The present study attempted develop WMoNbVTa high-entropy alloy (HEA) as diffusion barrier interface. A new double-layer WMoNbVTa/MoSi2 c...

Abstract In this study, the effect of Al on high temperature oxidation Al-containing refractory entropy alloys (RHEAs) Ta-Mo-Cr-Ti-xAl ( x = 5; 10; 15; 20 at%) was examined. Oxidation experiments were performed in air for 24 h at 1200 °C. The kinetics alloy with 5 at% is notably affected by formation gaseous MoO 3 and CrO , while continuous mass gain detected higher concentrations. 15 form rela...

We determined the role of the hyporheic zone (the subsurface zone where stream water and shallow groundwater mix) in enhancing microbially mediated oxidation of dissolved manganese (to form manganese precipitates) in a drainage basin contaminated by copper mining. The fate of manganese is of overall importance to water quality in Pinal Creek Basin, Arizona, because manganese reactions affect th...

Flooded rice fields are not only a global food source but also a major biogenic source of atmospheric methane. Using metatranscriptomics, we comparatively explored structural and functional succession of paddy soil microbiomes in the oxic surface layer and anoxic bulk soil. Cyanobacteria, Fungi, Xanthomonadales, Myxococcales, and Methylococcales were the most abundant and metabolically active g...

Willow (Salix spp.) stands are often proposed as vegetation covers for the restoration and stabilization of contaminated and derelict land. Planting willows on dredged sediment disposal sites for biomass production can be an alternative to traditional capping techniques. However, with the introduction of willow stands on dredged sediment disposal sites, the possibility of increased contaminant ...

To establish the structural and lithological controls on gas hydrate distribution and to assess the potential energy resource and environmental hazards in the Indian Ocean, non-pressurized and pressurized cores were recovered from the Krishna-Godavari (K-G) and Mahanadi Basins offshore east India, and from an Andaman Sea site. The pore fluids were analyzed for: salinity, Cl, sulfate, sulfide, c...

Ammonium was injected from the subseafloor hydrothermal system at the Endeavour Segment, Juan de Fuca Ridge, into the deep-sea water column resulting in an NH4 þ-rich (6177 nM) neutrally buoyant hydrothermal plume. This NH4 was quickly removed by both autotrophic ammonia oxidation and assimilation. The former accounted for at least 93% of total net NH4 þ removal, with its maximum rate in the ne...