In the present work, 5 wt.% and 10 yttria-stabilized zirconia (YSZ) nanoparticles were reinforced in Ni-20Cr powder deposited on boiler tube steel using a high-velocity oxy-fuel spraying process. The effect of YSZ reinforcement microhardness, surface roughness porosity was investigated. hardness highest for nanocomposite coating with found to increase decrease porosity. microstructure elements ...

Fe-20Cr-25Ni-Nb steel is an important material for developing highly compact and efficient nuclear power systems by using the supercritical CO2 Brayton cycle. The in-core materials should possess excellent oxidation resistance in a high-temperature environment. In this work, new 20Cr-25Ni-Nb with minor Mo addition was developed, its behavior investigated pure environment at 650 °C under 3.5 MPa...

A new relationship between the surface distribution of equivalent potential temperature and the potential temperature at the tropopause is proposed. Using a Gaussian approximation for the distribution of equivalent potential temperature, we argue that the tropopause potential temperature is approximately given by the mean equivalent potential temperature at the surface plus twice its standard d...

The Cr effects on hydrogen embrittlement behaviors in pure Ni, Ni–20Cr, and Ni–44Cr alloys with similar grain sizes were investigated using tensile tests under electrochemical charging microstructure observations. relative elongation (defined as divided by air) the Ni was higher lower than those of Ni–20Cr alloys, respectively. hydrogen-charged specimens follows. susceptibility nonmonotonically...