Additive manufacturing of functionally gradient degradable tools
AssigneeBaker Hughes, A Ge Company, LLC
InventorsJohn C. Welch, Zhiyue Xu, James Andy Oxford
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Abstract
A method of manufacturing an article comprises depositing a metallic powder on a substrate or a worktable; fusing the metallic powder according to a preset pattern; and adjusting a composition of the metallic powder or a condition to fuse the metallic powder or a combination thereof to additively form an article such that the article has a first portion and a second portion, wherein the first portion has one or more of the following properties different than those of the second portion: corrosion rate; tensile strength; compressive strength; modulus; or hardness.
Claims9
An article comprising a plurality of micro-sized or nano-sized galvanic cells, wherein the article has a seamless structure fully encompassing an empty space, each of the micro-sized or nano-sized galvanic cells comprising an anode and a cathode,
- the anode comprising one or more of the following:
- a magnesium-based alloy;
- an aluminum-based alloy;
- a zinc-based alloy;
- or a manganese-based alloy;
- and
- the cathode comprising a metal;
- an oxide of the metal;
- a nitride of the metal;
- or a cermet of the metal;
- wherein the metal is one or more of the following:
- W;
- Co;
- Cu;
- Ni;
- or Fe, and
- wherein the article is a hollow frac plug, a hollow ball, or a hollow ball seat.
Dependencies are inferred from the claim text.