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METAL POWDER ATOMIZATION MANUFACTURING PROCESSES

  • US 20190001416A1
  • Filed: 10/27/2016
  • Published: 01/03/2019
  • Est. Priority Date: 10/29/2015
  • Status: Active Application
First Claim
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1. A reactive metal powder atomization manufacturing process comprising:

  • atomizing a heated reactive metal source to produce a raw reactive metal powder;

    contacting said heated reactive metal source with an atomization mixture comprising at least one atomizing gas and at least one additive gas that is present at a concentration of less than 1000 ppm in said atomization mixture while atomizing said heated reactive metal source; and

    forming, with said at least one additive gas, a surface layer on said raw reactive metal powder, said raw reactive metal powder with said surface layer thereon, comprises less than 1000 ppm of at least one element from said at least one additive gas,wherein said surface layer comprises a first layer and a second layer, said first layer comprising atoms of said heated reactive metal source with atoms and/or molecules of said at least one additive gas, said first layer being a depletion layer deeper and thicker than said second layer, said second layer being a native oxide layer,and wherein a particle size distribution of about 10 to about 53 μ

    m of said raw reactive metal powder with said surface layer thereon, has a flowability less than 40 s, measured according to ASTM B213.

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