| 摘要 |
FIELD: powder metallurgy; production of high-porous permeable cellular materials. ^ SUBSTANCE: proposed method includes preparation of nickel powder suspension or mixture of powders for production of alloy in aqueous solution of polyvinyl alcohol. This suspension is applied on substrate made from porous polymer material for forming the blank which is dried and subjected to heat treatment at temperature not below 160C. Blank is placed in between non-conducting shields and electrochemical deposition of nickel from electrolyte is carried out by reversing the current. Polyvinyl alcohol and substrate are removed by thermal destruction. Blank is sintered during period of time s1.08(thetad)2/D, where s is sintering time, h; 1.08 is constant; theta is relative density of high-porous alloy thus produced; d is average diameter of cells of porous polymer material, mm; D is diffusion coefficient of powder mixture component which possesses minimum fluidity in galvanically deposited metal at sintering temperature, cm2/s. ^ EFFECT: high porosity of material and homogeneous structure in area and in depth. ^ 5 cl, 3 dwg, 1 tbl, 1 ex |
