Abstract
Ni-Mo-liC samples were prepared by mixing powders and hot pressing them in vacuum. The sample was melted and pressed under microgravity conditions by a sounding rocket. The electron microstructures of this sample showed the uniform distribution and the globular configuration of liC particles in Ni-Ho matrix. The distribution of elements of Ni, Mo, Ti and C was measured by micro Auger electron spectroscopy for three parts;TiC particles in matrix, the boundary of TiC particles and their matrix, and the matrix. the obtained results suggest the molten state of the sample was kept static during rocket fright without the influence of thermal convection and gravity segregation.
