Cold spray formation of thin metal coatings

Inactive Publication Date: 2006-05-04
NANOMAT
View PDF17 Cites 122 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] One object of the invention is to adapt the cold spray process to provide a method of coating fine metal particles, of less than 5 μm average particle size, to a work piece. Another object of the invention is to provide a refurbishing method for

Problems solved by technology

An inherent disadvantage is that a vacuum chamber is required.
There apparently is insufficient mass, and thus momentum, to propel the particle through the bow shock region.
This lower limitation on particle size may be the reason that cold spray processing has not been demonstrated useful in preparing thin metal coatings, for instance, films less than about 8 microns.
Thin metal coatings are typically achiev

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cold spray formation of thin metal coatings
  • Cold spray formation of thin metal coatings
  • Cold spray formation of thin metal coatings

Examples

Experimental program
Comparison scheme
Effect test

Example

EXAMPLE 1

[0042] This example illustrates the formation of an agglomerate of the invention using aluminum as the metal powder.

[0043] A mixture of glass spheres (142.5 g, 170-400 mesh soda lime glass, Ceroglass Technologies Inc., Columbus Tenn.) and aluminum powder (7.5 g, 1-3 μm, Atlantic Equipment Engineers, Bergenfield, N.J.) was mixed (25 rpm) in a Reetz rotary furnace (HTM Reetz GmbH, Germany) for 0.5 h at 80° C. under an argon flow (0.5 L / min). The agglomerate was used directly in the cold spray process.

Example

EXAMPLE 2

[0044] This example illustrates the formation of an agglomerate of the invention using copper as the metal powder.

[0045] A mixture of glass spheres (138.5 g, 170-400 mesh soda lime glass) and copper powder (12.5 g, 1.5-3 μm, Umicore Canada, Inc., Canada) is mixed (25 rpm) in a Reetz rotary furnace for 0.5 h at 70° C. under an argon flow (0.5 L / min).

Example

EXAMPLE 3

[0046] In a similar manner to Example 1, nickel powder (7.5 g, 50-100 nm, Tekna RF Plasma Equipment, Canada) is treated with glass spheres (142.5 g) at room temperature.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Temperatureaaaaaaaaaa
Temperatureaaaaaaaaaa
Lengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to an adaptation of the cold spray process to provide a method of coating fine metal particles, including aluminum and copper, onto a work piece. In one embodiment, the invention is a metal agglomerated hard sphere composition capable of providing about a 1 micron or thicker coating of a metal on a work piece in a cold spray process. In another embodiment the invention is a method of coating metal particles, including metal particles having a particle size of about 0.01 to about 10 micron, onto a work piece. The method of the invention circumvents many of the problems associated with cold spray processing of very fine particles.

Description

[0001] This invention was made with United States Government support under Agreement No. N00421-04-P-0625 awarded by Navy Air System Command. The United States Government has certain rights in the invention.BACKGROUND OF INVENTION [0002] 1. Field of Invention [0003] The present invention relates to metallurgy and more specifically to cold spray processing of metal powders to form thin metal coatings onto a work piece. [0004] 2. Description of Related Art [0005] U.S. Pat. No. 5,302,414 dated Apr. 12, 1994, incorporated herein by reference, and related re-examination certificate U.S. Pat. No. B1 5,302,414 dated Feb. 25, 1997, describe a cold gas dynamic spraying method for applying a coating, also referred to as cold spraying. That patent describes a process and apparatus for accelerating solid particles having a size from about 1-50 μm to supersonic speeds in the range of 300-1,200 m / sec and directing the particles against a substrate surface. When the particles strike the substrate ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22C1/05B22F1/065
CPCB22F1/0048B22F2999/00C23C24/04B22F1/0096B22F1/065B22F1/148
Inventor LIU, JUNHAI
Owner NANOMAT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap