2. Obtaining CMMp by powder metallurgy

2.1 General process

This is an interesting type of process, which can produce materials (alloys and/or composites) with non-equilibrium compositions and very high particle volume fractions [15] . When conventional powder metallurgy (PM) techniques are used, manufacturing costs are acceptable. A few industries produce CMMp parts by MP such as DWA, Advanced Composite Materials Corp. (ACMC), or Aerospace Corp. which obtains parts with a NiAl ₃ intermetallic matrix and alumina reinforcement particles. The latter materials are mainly intended for turbine blades or as constituents of aircraft engine combustion chambers. Westinghouse uses hot isostatic pressing of several parts...