Gating means for metal matrix composite manufacture

Details Gating means for metal matrix composite manufacture Gating means for metal matrix composite manufacture

C - Chemistry, Metallurgy

22

C

C22C 1/10 (2006.01) B22D 19/14 (2006.01) C04B 35/622 (2006.01) C04B 41/51 (2006.01) C04B 41/88 (2006.01) C22C 1/09 (1990.01)

Patent

CA 2081554

2081554 9117011 PCTABS00008 The present invention relates to the use of a gating means (3) in combination with a spontaneous infiltration process to produce a metal matrix composite body. Particularly, a permeable mass of filler material or a preform (2) is spontaneously infiltrated by molten matrix metal (5) to form a metal matrix composite body. A gating means (3) is provided which controls or limits the areal contact between molten matrix metal (5) and the filler material or preform (2). The use of a gating means (3) provides for control of the amount of matrix metal (5) which can contact the preform (2) or filler material, which may result in less machining of a formed metal matrix composite body compared with a similar metal matrix composite body made without a gating means (3). Moreover, the use of a gating means (3) ameliorates the tendency of a formed metal matrix composite body to warp due to the contact between the formed composite body and matrix metal carcass.

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