Alliedsignal Inc.

Edward V Limoncelli

Derek Raybould

Santosh K Das

Jerry C LaSalle

Charles Gasdaska

Metal and ceramic members are joined together by a braze joint including a member made of bar stock molybdenum, a first ductile member brazed between the molybdenum member and the metal member, and a second ductile member brazed between the molybdenum member and the ceramic member. The braze joint may be used to join a ceramic wheel shaft to a metal shaft in a turbomachine. The braze joint allows torsion to be transmitted between the ceramic wheel shaft and the metal shaft without the use of a metal sleeve.

Method for joining ceramic to metal

A rapidly solidified zirconium containing aluminum lithium alloy powder consisting essentially of the formula Al.sub.bal Li.sub.a Cu.sub.b Mg.sub.c Zr.sub.d where 'a' ranges from 2.1 to 3.4 wt %, 'b' ranges from about 0.5 to 2.0 wt %, 'c' ranges from 0.2 to 2.0 wt % and 'd' ranges from greater than about 0.6 to 1.8 wt %, the balance being aluminum. The powder is degassed in a vacuum at a temperature of at least about 450.degree. C. Components consolidated from the powder exhibit high tensile strength and elongation together with excellent notched impact toughness.

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Clinton, CT, United States of America

Edward V Limoncelli