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Flame spray powder mix
| Details |
Inventors: Patel, Mahesh S.;
Assignee: Eutectic Corporation (Flushing, NY)
Primary Examiner: Steiner; Arthur J.
Assistant Examiner:
Attorney, Agent or Firm: Hopgood, Calimafde, Kalil, Blaustein and Lieberman
A flame spray powder mix is provided for producing metal coatings on metal substrates, such as ferrous metal substrates, e.g., steel, cast iron, among other metal substrates, the powder mix comprising agglomerates of silicon and at least one metal disilicide, e.g., titanium disilicide, homogeneously mixed or blended with a coating metal powder, such as nickel powder. |
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DETAILED DESCRIPTION What is claimed is: 1.
A flame spray powder mixture formed of agglomerates of a metal disilicide and silicon combined together, with said agglomerates mixed with a coating metal powder, said metal disilicide (MSi.
sub.
2) and silicon when thermally fused together providing a eutectic phase of the binary MSi.
sub.
2 -Si, said metal disilicide being at least one selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Re, Mn, and Co, said agglomerates being made of fine particles of said metal disilicide and silicon of average size less than about 20 microns bound together in a matrix of a fugitive binder, the average size of said agglomerates and said coating metal powder ranging from about 30 to 140 microns, the composition of said powder mixture ranging from about 2% to 15% by weight of said metal disilicide and sufficient silicon in the range of about 2% to 15% by weight to provide a eutectic phase of said binary MSi.
sub.
2 -Si, with substantially the balance of said flame spray powder mixture being said coating metal powder.
2.
The flame spray powder of claim 1, wherein the amount of metal disilicide ranges from about 2% to 10% and the amount of said silicon ranges from 2% to about 10% by weight of said flame spray powder mixture.
3.
The flame spray powder mixture of claim 1, wherein the coating metal powder is selected from the group consisting of Ni, Co, Fe, Cu, nickel-base, cobalt-base, iron-base, and copper-base alloys.
4.
The flame spray powder mixture of claim 1, wherein the metal disilicide agglomerated with silicon is TiSi.
sub.
2.
5.
A flame spray powder mixture formed of agglomerates of a titanium disilicide and silicon combined together, with said agglomerates mixed with nickel powder, the average size of said agglomerates and said nickel powder ranging from about 30 to 140 microns, said agglomerates being made up of fine particles of said titanium disilicide and silicon of average size less than about 20 microns bound together in a matrix of a fugitive binder, the composition of said powder mixture ranging from about 2% to 15% by weight of said titanium disilicide, 2% to 15% by weight of silicon, and substantially the balance of said mixture nickel powder, said titanium disilicide and said silicon when fused together providing a eutectic phase of the binary TiSi
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