High-Porosity Titanium, Stainless Steel, and Superalloy Parts

Abstract

The production of highly porous parts from titanium, stainless steel, and nickel-based superalloys is of increasing interest in lightweight constructions. A new space-holder method uses carbamide (urea) and ammonium hydrogen carbonate to produce samples with porosities between 60 and 80 %. Depending on the shape and size distribution of the space holder, spherical and angular pores in the range of 0.1–2.5 mm were obtained.