Abstract
Effects of sintering conditions such as heating temperature and heating rate on the density and microstructure of a sintered body of molybdenum were investigated. Both the oxygen content and the density of an intermediate sintered body influenced the density and the microstructure of the sintered body. First, the sintered body with a higher density and with a smaller number of pores was obtainable from the intermediate sintered body with lower oxygen content and with a lower density. Secondly, the grain size of the sintered body tended to decrease almost linearly with the increase of the number of pores. The latter result suggests that the grain growth in the sintered body was inhibited by the existence of pores at the grain boundaries.
