Modern Processes of Producing Two-Layer Filtering Materials

Abstract

The paper describes developments of the Powder Metallurgy Institute of National Academy of Sciences of Belarus in the field of producing two-layer permeable structures with a filtering layer 0.3-0.4 mm in thickness. The presented processes include: copressing of coarse powder and fine powder applied onto one of the shape-generating elements with the help of binder; activation of sintering of discrete metal fibers by fine powder particles; use of removable agents in plasma-assisted ion sputtering of coatings onto porous powder sub¬strate; self-propagating high-temperature synthesis in two-layer porous structures formed by different metals; and granulation of metal particles by pore agents. Examples of products made of the developed materials are provided.