Densification Behavior of Molybdenum Composites During Spark Plasma Sintering

摘要

Refractory composites are produced by powder metallurgical processes, including conventional sintering steps at high temperatures and long sinter times. As an alternative method, the spark plasma sintering offers the possibility, to produce bulk specimens at lower temperatures and with short sintering times. Moreover, the grain growth is reduced. The aim of this work is to investigate both, the influence of sintering parameters and the influence of powder preparation on densification behaviour of pure Molybdenum and Molybdenum composites. The Mo composites were prepared by ball milling, by adding of Cu or TiC. It was shown, that the milling conditions have important influence on consolidation behaviour of powders. Furthermore, the compaction depends strongly on temperature and pressure applied during spark plasma sintering.