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US 11,028,468 B2Granted
Soft magnetic alloy optimized for metal injection molding
AssigneeApple Inc.
InventorsJohn C. DiFonzo, Abhijeet Misra, Charles J. Kuehmann, Daniel T. McDonald
Life of this patent
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Abstract
A component for an electronic device can include a metal alloy formed by a metal injection molding process. The metal alloy can have a composition of about 32 wt % to about 38 wt % cobalt and about 62 wt % to about 68 wt % iron.
Claims15
A sintered magnetic component for an electronic device, comprising:
- a metal alloy in a body-centered cubic phase and comprising about 32 weight percent (wt %) to about 38 wt % cobalt and about 62 wt % to about 68% wt % iron;
- the sintered magnetic component having a porosity between 2% and 10% and an average pore size of 2 microns to 5 microns.
A magnetic article, comprising:
- sintered particles comprising a magnetic alloy, the magnetic alloy comprising about 34 weight percent (wt %) to about 36 wt % cobalt and about 64 wt % to about 66 wt % iron;
- the magnetic article in an ordered body-centered cubic phase and having an average pore size of 2 microns to 5 microns.
A method of forming a sintered article from a feedstock, comprising:
- heating a binder and the feedstock, the feedstock having about 34 weight percent (wt %) to about 36 wt % cobalt and about 64 wt % to about 66 wt % iron;
- injecting the heated binder and feedstock into a mold;
- and
- cooling the heated binder and feedstock;
- and
- sintering the feedstock to form the sintered article, the sintered article comprising about 34 weight percent (wt %) to about 36 wt % cobalt and about 64 wt % to about 66 wt % iron and in an ordered body-centered cubic phase and having an average pore size of 2 microns to 5 microns.
3 more elements
Dependencies are inferred from the claim text.