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Title: Method for minimizing decarburization and other high temperature oxygen reactions in a plasma sprayed material

Abstract

A method is disclosed for spray coating material which employs a plasma gun that has a cathode, an anode, an arc gas inlet, a first powder injection port, and a second powder injection port. A suitable arc gas is introduced through the arc gas inlet, and ionization of the arc gas between the cathode and the anode forms a plasma. The plasma is directed to emenate from an open-ended chamber defined by the boundary of the anode. A coating is deposited upon a base metal part by suspending a binder powder within a carrier gas that is fed into the plasma through the first powder injection port; a material subject to degradation by high temperature oxygen reactions is suspended within a carrier gas that is fed into the plasma through the second injection port. The material fed through the second injection port experiences a cooler portion of the plasma and has a shorter dwell time within the plasma to minimize high temperature oxygen reactions. The material of the first port and the material of the second port intermingle within the plasma to form a uniform coating having constituent percentages related to the powder-feed rates of the materials through the respectivemore » ports.« less

Inventors:
 [1];  [2];  [3]
  1. Madison, WI
  2. Bosque Farms, NM
  3. Albuquerque, NM
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
OSTI Identifier:
868811
Patent Number(s):
5217746
Application Number:
07/627,060
Assignee:
Fisher-Barton Inc. (Watertown, WI)
Patent Classifications (CPCs):
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; minimizing; decarburization; temperature; oxygen; reactions; plasma; sprayed; material; disclosed; spray; coating; employs; gun; cathode; anode; gas; inlet; powder; injection; suitable; introduced; ionization; forms; directed; emenate; open-ended; chamber; defined; boundary; deposited; base; metal; suspending; binder; carrier; fed; subject; degradation; suspended; experiences; cooler; portion; shorter; dwell; time; minimize; intermingle; form; uniform; constituent; percentages; related; powder-feed; rates; materials; respective; ports; dwell time; uniform coating; coating material; plasma spray; gas inlet; carrier gas; base metal; plasma gun; chamber defined; feed rate; plasma sprayed; binder powder; temperature oxygen; spray coating; oxygen react; oxygen reaction; sprayed material; /427/

Citation Formats

Lenling, William J, Henfling, Joseph A, and Smith, Mark F. Method for minimizing decarburization and other high temperature oxygen reactions in a plasma sprayed material. United States: N. p., 1993. Web.
Lenling, William J, Henfling, Joseph A, & Smith, Mark F. Method for minimizing decarburization and other high temperature oxygen reactions in a plasma sprayed material. United States.
Lenling, William J, Henfling, Joseph A, and Smith, Mark F. Tue . "Method for minimizing decarburization and other high temperature oxygen reactions in a plasma sprayed material". United States. https://www.osti.gov/servlets/purl/868811.
@article{osti_868811,
title = {Method for minimizing decarburization and other high temperature oxygen reactions in a plasma sprayed material},
author = {Lenling, William J and Henfling, Joseph A and Smith, Mark F},
abstractNote = {A method is disclosed for spray coating material which employs a plasma gun that has a cathode, an anode, an arc gas inlet, a first powder injection port, and a second powder injection port. A suitable arc gas is introduced through the arc gas inlet, and ionization of the arc gas between the cathode and the anode forms a plasma. The plasma is directed to emenate from an open-ended chamber defined by the boundary of the anode. A coating is deposited upon a base metal part by suspending a binder powder within a carrier gas that is fed into the plasma through the first powder injection port; a material subject to degradation by high temperature oxygen reactions is suspended within a carrier gas that is fed into the plasma through the second injection port. The material fed through the second injection port experiences a cooler portion of the plasma and has a shorter dwell time within the plasma to minimize high temperature oxygen reactions. The material of the first port and the material of the second port intermingle within the plasma to form a uniform coating having constituent percentages related to the powder-feed rates of the materials through the respective ports.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {6}
}

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