Whisker composite ceramics for metal extrusion or the like

Details Whisker composite ceramics for metal extrusion or the like Whisker composite ceramics for metal extrusion or the like

1986-10-24

1988-09-06

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Devitrified glass-ceramics

501 8, 501 32, 501 4, 501 94, 501 95, 501108, 501118, 501122, 501123, 501153, 501154, 264DIG11, 72467, C04B 3502, C04B 3508, C03C 1006

Patent

active

047693460

ABSTRACT:
A composite ceramic extrusion die consisting of a silicon carbide wisker-reinforced cordierite ceramic wherein the predominant matrix phase is cordierite or, preferably, barium-stuffed cordierite having a crystal compositon xBaO.4MgO.(4+x)Al.sub.2 O.sub.3.(10-2x)SiO.sub.2 wherein x ranges from zero up to about 0.5, such extrusion die exhibiting excellent durability under the conditions of non-ferrous metal alloy extrusion at temperatures of 700.degree.-900.degree. C., is described.

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"Determination of Some Useful Properties of Partially Stabilized Zirconia and the Application to Extrusion Dies", Gulati et al., Ceramic Bulletin, vol. 59 (2), (1980), pp. 211-215.

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