# US 5,376,191 A · Amorphous alloy-based metallic finishes having wear and corrosion resistance

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- Number: US 5,376,191 A
- Document ID: US5376191A
- Status: Granted
- Kind: A
- Application number: 08/060,985
- Filed: 1993-05-14
- Granted: 1994-12-27
- Earliest claimed: 1992-05-22
- Assignees: Neyrpic
- Inventors: Jean-Marie Roman; Jean-Marie DuBois; Philippe Plaindoux; Jean-Pierre Houin
- Web page: https://patentgrep.com/patent/US5376191A

## CPC

- C22C 45/008: {with Fe, Co or Ni as the major constituent (C22C45/02, C22C45/04 take precedence)}
- C23C 4/073: containing MCrAl or MCrAlY alloys, where M is nickel, cobalt or iron, with or without non-metal elements
- C23C 30/00: Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence)
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04)

## Abstract

The finishes of the present invention consist essentially of metal alloys having the general formula: T.sub.a Cr.sub.b Zr.sub.c B.sub.d M.sub.e M'.sub.f X.sub.g I.sub.h(I) in which a+b+c+d+e+f+g+h=100 atomic percent; T is Ni, Co, Ni--Co or any combination of at least one of Ni and Co with Fe, wherein 3<Fe<82 at. % and 3<a<85 at. %; M is one or more elements of the group consisting of Mn, Cu, V, Ti, Mo, Ru, Hf, Ta, W, Nb, Rh, wherein 0<e<12 at. %; M' is one or more rare earths, including Y, wherein 0<f<4 at. %; X is one or more metalloids of the group consisting of C, P, Ge and Si, wherein 0<g<17 at. %; I represents inevitable impurities, wherein h<1 at. %, and 5.ltoreq.b.ltoreq.25, 5.ltoreq.c.ltoreq.15, and 5.ltoreq.d.ltoreq.18. Powders obtained from these alloys that are deposited on substrates by thermal projection provide finishes having increased hardness in addition to high ductility and excellent resistance to corrosion. The finishes are suited for applications including hydraulic equipment.

## Claims

### Claim 1

Amorphous metallic finishes being characterized as resistant to wear and corrosion, and consisting essentially of metal alloys of the general formula:
T.sub.a Cr.sub.b Zr.sub.c B.sub.d M.sub.e M'.sub.f X.sub.g I.sub.h(I)
wherein T is selected from the group consisting of Ni, Co, Ni--Co and any combination of at least one of Ni and Co combined with Fe, and 3<a<70 at. %;
M is one or more elements selected from the group consisting of Mn, Cu, V, Ti, Mo, Ru, Hf, Ta, W, Nb and Rh, and 0<e<12 at. %;
M' is one or more elements selected from the group consisting of the rare earth elements and Y, and 0<f<4 at. %;
X is one or more metalloids selected from the group consisting of C, P, Ge and Si, and 0<g<17 at. %;
I represents inevitable impurities, and h<1 at. %;
5.ltoreq.b.ltoreq.25 at. %;
5.ltoreq.c.ltoreq.15 at. %;
5.ltoreq.d<18 at. %; and
a+b+c+d+e+f+g+h=100 at. %.

### Claim 2 (depends on 1)

The amorphous metallic finishes of claim 1, wherein the metal alloys have the general formula:
Ni.sub.a Cr.sub.b Zr.sub.c B.sub.d M.sub.e M'.sub.f X.sub.g I.sub.h(II)
wherein a+b+c+d+e+f+g+h=100 at. %; and
M, M', X, I represent the same elements as those for formula (I), and the percentages thereof being the same as in claim 1.

### Claim 3 (depends on 1)

The amorphous metallic finishes of claim 1, wherein the metal alloys have the general formula:
Ni.sub.a Fe.sub.a' Cr.sub.b Zr.sub.c B.sub.d M.sub.e M'.sub.f X.sub.g I.sub.h (III)
wherein 0.ltoreq.a+a'.ltoreq.70 at. %; and all of the other symbols have the same meaning as in formula (I).

### Claim 4 (depends on 1)

The amorphous metallic finishes of claim 1, wherein the metal alloys have the general formula:
Ni.sub.a Co.sub.a" Cr.sub.b Zr.sub.c B.sub.d M.sub.e M'.sub.f X.sub.g I.sub.h (IV)
wherein 0.ltoreq.a+a".ltoreq.70 at. %; and all of the other symbols have the same meaning as in formula (I).

### Claim 5 (depends on 1)

The amorphous metallic finishes of claim 1, wherein the metal alloys have the general formula:
Ni.sub.a Fe.sub.a' Co.sub.a" Cr.sub.b Zr.sub.c B.sub.d M.sub.e M'.sub.f X.sub.g I.sub.h (V)
wherein 0.ltoreq.a+a'+a".ltoreq.70 at. %; and all of the other symbols have the same meaning as in formula (I).

### Claim 6 (depends on 3)

The amorphous metallic finishes of claim 3, wherein the metallic alloys have a temperature of crystallization of about 545.degree. C.

### Claim 7 (depends on 4)

The amorphous metallic finishes of claim 4, wherein the metallic alloys have a temperature of crystallization of about 570.degree. C.

### Claim 8 (depends on 5)

The amorphous metallic finishes of claim 5, wherein the metallic alloys have a temperature of crystallization of about 560.degree. C.