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Abstract
Microstructural changes occurring during the sintering of molybdenum compacts containing minor additions of nickel were compared with changes during the creep of thin molybdenum foils in the presence of nickel vapour. Evidence from micro-structural, shrinkage, and creep rate studies indicates that there exist three stages of sintering: an intrinsic stage during heating, in which the dislocation structure caused by cold compaction is still maintained; a transient stage, in which recovery and recrystallization occur; and a post-recrystallization stage, in which grain boundary diffusion is the dominant shrinkage mechanism. PM/0353