General Electric Company

Roger J Perkins

Murray S Smith, Jr

William R Young

Robert E Fryxell

A mixture of two powdered alloys of the M, Cr, Al type, M being Co and/or Ni, is disclosed, in one form, for use in providing an abradable surface of an article and is characterized by the substantial absence of B. The first alloy has substantially no Si and has a higher melting range than that of the second alloy. The second alloy has substantially no Y and consists essentially of, by weight, 8-12% Si, 1.5-4% Al, 10-30%Cr, with the balance M and incidental impurities. The total mixture composition consists essentially of, by weight, 10-35% Cr, 4-10% Al, from a small but effective amount up to about 0.09% Y, 2-6% Si, with the balance M and incidental impurities.

Method for making an abradable article

A mixture of two powdered alloys of the M, Cr, Al type, M being Co and/or Ni, is disclosed, in one form, for use in providing an abradable surface of an article and is characterized by the substantial absence of B. The first alloy has substantially no Si and has a higher melting range than that of the second alloy. The second alloy has substantially no Y and consists essentially of, by weight, 8-12% Si, 1.5-4% Al, 10-30% Cr, with the balance M and incidiental impurities. The total mixture composition consists essentially of, by weight, 10-35% Cr, 4-10% Al, from a small but effective amount up to about 0.09% Y, 2-6% Si, with the balance M and incidental impurities.

Abradable article, and powder and method for making

A powder mixture for use in a method of repairing a superalloy article includes first and second Ni base superalloy powders. The first powder, characterized by superior hot corrosive resistance along with good oxidation resistance and the substantial absence of melting point depressants selected from Si and B greater than normal impurity levels, is included in the range of 30-70 wt % of the mixture. The second powder has a composition substantially within the same composition range as that of the first powder with the inclusion, by wt, of 0.5-5% B and up to 6% Si.

Growing community of inventors

Evendale, OH, United States of America

Roger J Perkins