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Surface modified particulate and sintered or injection molded products

  • US 9,512,544 B2
  • Filed: 07/11/2014
  • Issued: 12/06/2016
  • Est. Priority Date: 07/11/2013
  • Status: Active Grant
First Claim
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1. A method of making an object with an additive manufacturing system, the method comprises:

  • depositing a filament, with the system comprising a digitally controlled applicator, in a controlled x-y plane with subsequent z-direction filament application to obtain a preform object;

    the filament comprising;

    about 70 to 1 wt. % of a thermoplastic polymer; and

    about 99 to 30 wt. % of a metal particulate, dispersed in the polymer, the particulate having a particle size of less than 500 microns, and an exterior coating of interfacial modifier in an amount of about 0.02 to 2.0 wt. %, all percentages based on the weight of the filament; and

    sintering the preform object to remove the polymer and bond the particulate forming the object.

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