# US 4,395,464 A · Copper base alloys made using rapidly solidified powders and method

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- Number: US 4,395,464 A
- Document ID: US4395464A
- Status: Granted
- Kind: A
- Application number: 06/249,926
- Filed: 1981-04-01
- Granted: 1983-07-26
- Earliest claimed: 1981-04-01
- Assignees: Marko Materials, Inc.
- Inventors: Viswanathan Panchanathan; Ranjan Ray; Bill C. Giessen
- Web page: https://patentgrep.com/patent/US4395464A

## CPC

- C22C 9/06: with nickel or cobalt as the next major constituent
- Y10T 428/12014: having metal particles
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

New copper-rich metal alloys containing nickel along with certain specific amounts of boron are disclosed. The alloys are subjected to a rapid solidification processing (RSP) technique which produces cooling rates between .about.10.sup.5.degree. to 10.sup.7 .degree. C./sec. The asquenched ribbon, powder, etc. consists primarily of a metastable crystalline solid solution phase. The metastable crystalline phases are subjected to suitable heat treatments so as to produce a transformation to a stable multiphase microstructure, which includes borides. This heat treated alloy exhibits superior mechanical properties with good corrosion and/or oxidation resistance for numerous engineering applications.

## Claims

### Claim 1

Fine grained Copper-Nickel alloys containing borides in bulk form having composition Cu.sub.a Ni.sub.b Al.sub.c Cr.sub.d M.sub.e B.sub.f, wherein Cu, Ni, Al, Cr, and B are copper, nickel, aluminum, chromium and boron respectively, and M represents one or more of iron (Fe), cobalt (Co), vanadium (V), and manganese Mn) and wherein a, b, c, d, e and f represent weight percent of Cu, Ni, Al, Cr, M and B respectively and having the following values: a=40-87, b=10.5-44, c=0-10, d=0-18, e=0-8, f=1.5-4 wherein the maximum value of b+c+d+e may not exceed 56, the maximum value of c+d may not exceed 22.5 and the sum of a+b+c+d+e+f=100, made by subjecting the powders of the said alloy by application of pressure and heat, said powders being made by the method comprising the following steps:
(a) forming a melt of said alloy
(b) depositing said melt against a rapidly moving quench surface adapted to quench said melt at a rate in the range of approximately 10.sup.5 to 10.sup.7 .degree. C./second and form thereby a rapidly solidified brittle strip of said alloys characterized by predominantly a single solid solution structure,
(c) comminuting said strip into powders.

### Claim 2 (depends on 1)

An alloy of claim 1 having the composition Cu.sub.52.5-83.5 Ni.sub.15-44 B.sub.1.5-3.5 wherein the subscripts are in weight percent.

### Claim 3 (depends on 1)

An alloy of claim 1 having the composition Cu.sub.64.5-86.6 Ni.sub.10.5-24 Al.sub.1-8.2 B.sub.1.9-3.3, wherein subscripts are in weight percent.

### Claim 4 (depends on 1)

An alloy of claim 1 having composition Cu.sub.65-85 Ni.sub.12.5-24 Cr.sub.4.5-18 B.sub.1.5-4 wherein subscripts are in weight percent and the sum of weight percent of Cu, Ni, Cr and B is 100.

### Claim 5 (depends on 1)

An alloy of claim 1 having the composition Cu.sub.65-87 Ni.sub.10.5-24 Al.sub.0.5-7.5 Cr.sub.4.5-15 B.sub.1.6-3.6 wherein subscripts are in weight percent and the sum of weight percent of Cu, Ni, Al, Cr, and B is 100.