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US 2021/0069792 A1Published application
Sintered porous material having nodes and fibers of different materials, with different sintering points, and related methods of preparation and use
AssigneeEntegris, Inc.
InventorRobert S. ZELLER
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Abstract
Described are porous sintered metal bodies, methods of making and using the porous sintered metal bodies, and methods of using the porous sintered metal bodies for commercial applications that include filtering a fluid, including in applications requiring high efficiency (high LRV) filtration.
Claims18
A porous sintered metal body comprising a metal matrix comprising elongate metal fibers connected at connective metal nodes, the matrix comprising:
- connective metal nodes comprising a first metal material having a first sintering point;
- elongate metal fibers of a second metal material having a second sintering point that is greater than the first sintering point;
- wherein the connective metal nodes are fused to the elongate metal fibers to form an interconnected metal matrix comprising the elongate metal fibers connected by and extending between the connective metal nodes.
A method of forming a metal matrix that includes elongate metal fibers connected at connective metal nodes, the method comprising:
- providing a blend of metal particles including powdered metal particles of a first metal material having a first sintering point, elongate metal fiber particles of a second metal material having a second sintering point, and with the second sintering point being above the first sintering point;
- and
- sintering the blend at a temperature that is above the first sintering point to sinter the powdered metal material and form a metal matrix comprising the elongate metal fibers connected at connective metal nodes formed by sintering the powdered metal particles.
A blend of metal materials comprising:
- powdered metal particles having a first sintering point;
- and
- elongate metal fiber particles of a second metal material having a second sintering point, with the second sintering point being above the first sintering point, the blend having has an apparent density of less than 0.6 gram per cubic centimeter.
Dependencies are inferred from the claim text.