ABSTRACT
Tungsten heavy alloys are two phase composites that are generally processed by liquid phase sintering. The properties of heavy alloys critically depend on the sintering conditions and alloying additions. An important aspect of successful sintering is control of pores and impurities via the sintering atmosphere. Secondary factors such as the time and temperature also effect residual porosity, which in turn has a strong negative influence on mechanical properties. Alloying with refractory metals is effective in promoting higher strength via a reduction in the sintered grain sizes. This paper discusses recent developments relating to the sintering, alloying, physical metallurgy, and mechanical properties of liquid phase sintered tungsten heavy alloys.
