Liquid phase sintered dense composite body for brazed joints and

Details Liquid phase sintered dense composite body for brazed joints and Liquid phase sintered dense composite body for brazed joints and

1979-03-19

1981-09-15

Hunt, Brooks H.

Stock material or miscellaneous articles

All metal or with adjacent metals

428545, 428556, 428562, 4285395, 428563, 428565, 428564, 75208R, 75DIG1, 75201, 75202, 75203, 75204, 75205, 75206, 75229, 75226, 75232, 75236, 75242, B22F 300

Patent

active

042898331

ABSTRACT:
A liquid phase sintered body for brazed joints having a multiplicity of pores, grooves and/or indented patterns formed on a desired surface. The liquid phase sintered body is produced by a method comprising the steps of forming a compact body of a mixture of a hard refractory material, such as carbides, nitrides, oxides, borides and silicides mixed with cementing metal in powder form, placing on the desired surface any one of coarse grains, strands or plates of a metal having a diameter or a thickness over ten times as great as the grain size of the cementing metal, and sintering the compact body under conditions suitable for melting the coarse grains, strands and/or mesh of strands or plates after densification of the compact body has been completed or substantially completed. The metal forming the coarse grains, strands or plates must have a melting point which is more than 50.degree. C. higher than the temperature at which the cementing metal in powder form melts, good wettability with respect to the hard refractory material and excellent properties as a cementing metal.
The sintered body thus prepared by liquid phase sintering has a multiplicity of pores, grooves and/or indented patterns at a portion where the coarse grains, strands or mesh of strands or plates have been placed and is highly suitable for joining to a base metal by means of brazing.

REFERENCES:
patent: 3068016 (1962-12-01), Dega
patent: 3460920 (1969-08-01), Long et al.
patent: 3889348 (1975-06-01), Lemelson

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