Crucible is the indispensable vessel in smelting of superalloy, and service life crucibles quite important to development superalloy. In order extend crucible for superalloy smelting, alumina-based are prepared by slip casting, mullite fibers used as reinforcement phase. The effect on microstructure property was studied. appropriate content beneficial comprehensive performance crucibles. mechan...

Oxidation resistance of Ni-base single crystal superalloy is substantially improved when melted using a CaO crucible compared to that an Al2O3 crucible. In order understand the underlying mechanism, sulfur segregation at oxide/substrate interfaces was characterized aberration corrected scanning transmission electron microscope with energy dispersive X-ray spectroscopy (STEM-EDS) and three-dimen...

he global ocean is the last physical frontier on Earth. Covering 70 percent of the planetary surface, it is the largest, most complex biome we know. The ocean is a huge, mobile reservoir of heat and chemical mass. As such, it is the " engine " that drives weather-climate systems across the ocean basins and the continents, directly affecting food production , drought, and flooding on land. Water...

The microstructure evolution and interface characteristics of a directionally solidified Ti-43Al-3Si (at.%) alloy in an alumina (Al2O3) crucible with new Y2O3 skull-aided technology were investigated. The Y2O3-skull that is in contact with the TiAl-melt is relatively stable, which results in a more controlled reaction between the skull and the melt than in the case of an Al2O3 crucible is used....

Relatively little has been written about the military women who served in Vietnam, and there is virtually no literature on deployed civilian women (non-military). We examined the experiences of 1285 American women, military and civilian, who served in Vietnam during the war and responded to a mail survey conducted approximately 25 years later in which they were asked to report and reflect upon ...