# US 10,370,744 B2 · Reinforced magnesium composite and a method of producing thereof

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- Number: US 10,370,744 B2
- Document ID: US10370744B2
- Status: Granted
- Kind: B2
- Application number: 15/182,060
- Filed: 2016-06-14
- Published: 2017-12-14
- Granted: 2019-08-06
- Earliest claimed: 2016-06-14
- Assignees: King Fahd University of Petroleum and Minerals
- Applicants: King Fahd University of Petroleum and Minerals
- Inventors: Syed Fida Hassan; Nasser Al-Aqeeli; Nasirudeen Olalekan Ogunlakin
- Web page: https://patentgrep.com/patent/US10370744B2

## CPC

- C22C 23/00: Alloys based on magnesium
- B22F 1/09: {Mixtures of metallic powders}
- B22F 1/12: Metallic powder containing non-metallic particles (containing lubricating or binding agents or organic material B22F1/10)
- B22F 3/20: by extruding
- C22C 1/1084: {by mechanical alloying (blending, milling)}
- B22F 3/04: by applying fluid pressure {, e.g. by cold isostatic pressing [CIP]}
- B22F 9/04: starting from solid material, e.g. by crushing, grinding or milling ({C22C1/1084 takes precedence}; crushing, grinding or milling, in general, see the relevant subclasses, e.g. B02C)
- B22F 2998/10: Processes characterised by the sequence of their steps
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER

## Abstract

A reinforced magnesium composite, and a method of producing thereof, wherein the reinforced magnesium composite comprises elemental magnesium particles, elemental nickel particles, and one or more ceramic particles with elemental nickel particles being dispersed within elemental magnesium particles without having intermetallic compounds therebetween. Various embodiments of the method of producing the reinforced magnesium composite are also provided.

## Claims

### Claim 1

A method of producing a reinforced magnesium composite, comprising:
mixing a powder blend comprising elemental magnesium particles, elemental nickel particles, and titanium oxide particles to form a mixed powder blend, wherein the titanium oxide particles and the elemental nickel particles are dispersed within the elemental magnesium particles;
cold-pressing the mixed powder blend under a uniaxial compressive load at a temperature of no more than 30° C. to form a magnesium composite billet; and
sintering the magnesium composite billet at a temperature of at least 500° C. in an inert environment to form the reinforced magnesium composite,
wherein the elemental magnesium particles and elemental nickel particles are physically bonded without having intermetallic bonds therebetween.

### Claim 2 (depends on 1)

The method of claim 1, further comprising:
coating an external surface of the magnesium composite billet with colloidal graphite prior to the sintering; and
extruding the reinforced magnesium composite having a colloidal graphite coating under a second uniaxial compressive load and a temperature of at least 250° C. to form a reinforced magnesium composite extrudate.

### Claim 3 (depends on 2)

The method of claim 2, wherein the reinforced magnesium composite is extruded with an extrusion ratio in the range of 12:1 to 20:1.

### Claim 4 (depends on 2)

The method of claim 2, wherein each of the uniaxial compressive load and the second uniaxial compressive load is in the range of 150-1,000 tons provided by a hydraulic press.

### Claim 5 (depends on 2)

The method of claim 2, wherein the reinforced magnesium composite extrudate has a volume fraction of voids of less than 0.005.

### Claim 6 (depends on 1)

The method of claim 1, wherein the reinforced magnesium composite has a volume fraction of voids of less than 0.01.

### Claim 7 (depends on 1)

The method of claim 1, wherein the reinforced magnesium composite comprises grains with an average size of 1-3 μm.

### Claim 8 (depends on 1)

The method of claim 1, wherein the elemental nickel particles are present in the powder blend in a volume fraction of no more than 0.08 and the titanium oxide particles are present in the powder blend in a volume fraction of no more than 0.01, each being relative to the total volume of the powder blend.

### Claim 9 (depends on 1)

The method of claim 1, further comprising:
adding ceramic nanoparticles to the powder blend prior to the mixing.

### Claim 10 (depends on 9)

The method of claim 9, wherein the ceramic nanoparticles are at least one selected from the group consisting of aluminum oxide, silica, silicon carbide, aluminum nitride, aluminum titanate, barium ferrite, barium strontium titanium oxide, barium zirconate, boron carbide, boron nitride, zinc oxide, tungsten oxide, cobalt aluminum oxide, silicon nitride, titanium carbide, titanium dioxide, zinc titanate, hydroxyapatite, zirconium oxide, and cerium oxide.

### Claim 11 (depends on 9)

The method of claim 9, wherein the ceramic nanoparticles are present in the powder blend in a volume fraction of no more than 0.01 relative to the total volume of the powder blend.

### Claim 12 (depends on 9)

The method of claim 9, wherein the ceramic nanoparticles have an average particle size in the range of 1-200 nm.

### Claim 13 (depends on 1)

The method of claim 1, wherein the mixed powder blend is cold-pressed via a hydrostatic pressure provided by an incompressible fluid.