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Edison Welding Institute, Inc.

Edward D Herderick

Nathan David Ames

Kirk E Cooper

Alber Sadek

A method for fabricating assemblies that includes providing a first component that further includes silicon carbide and that has an upper portion and a tapered lower portion; providing a second component that further includes silicon carbide and that has an upper portion that is adapted to receive the tapered lower portion of the first component; providing a predetermined amount of multiphase Al&#x2014;Si braze foil; grinding the Al&#x2014;Si braze foil into a powder; mixing a predetermined amount of braze paste binder with the Al&#x2014;Si powder to form a slurry; uniformly applying the slurry to the tapered lower portion of the first component; uniformly applying the slurry to the upper portion of the second component and inserting the tapered lower portion of the first component into the upper portion of the second component; and heating the applied slurry to a temperature of 725&#xb0; C. to 1450&#xb0; C. for a predetermined period of time.

Method for joining silicon carbide components to one another

A method for fabricating assemblies includes providing first and second components that include ceramic, metal, or composite; positioning a multiphase joining interlayer between the first and second components, wherein the joining interlayer includes a first phase that melts at a first temperature and a second phase interspersed throughout the first phase, and wherein the second phase melts at a second temperature that is lower than the melting temperature of the first phase; and heating the joining interlayer to a temperature in the range of 725&#xb0; C. to 1450&#xb0; C. for a predetermined period of time to soften the first phase and melt the second phase, wherein the first phase remains in a solid or a semi-solid state, and wherein the second phase segregates to the boundaries of the first phase and transforms the joining interlayer into a substantially porosity-free adherent material that joins the first component to the second component.

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Powell, OH, United States of America

Edward D Herderick