Gm Global Technolgoy Operations, Inc.

Zach Steffes

Qigui Wang

Andrew Thomas Cunningham

Brennon L White

Liang Wang

Jeffrey B Harris

A method to manufacture a ceramic foam filter includes: sintering a filter body to a temperature greater than a molten metal to be filtered through the body; creating multiple tortuous path channels extending through the filter body individually having a repeated and controlled passage geometry creating a continuously changing diameter and area of a flow path through the multiple tortuous path channels causing localized increases and decreases in molten metal flow rate through the multiple tortuous path channels; and applying a mixture of at least one ceramic powder and at least one binder using additive manufacturing to shape the filter body including the multiple tortuous path channels.

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West Bloomfield, MI, United States of America

Zach Steffes