Abradable article, and powder and method for making

Details Abradable article, and powder and method for making Abradable article, and powder and method for making

1986-11-28

1989-06-27

Lechert, Jr., Stephen J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

75246, 416241R, C22C 1905, C22C 1907

Patent

active

048429538

ABSTRACT:
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.

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