back to top
My wish lists
Save your wish list
If you want to add more content to your wish list, simply log in. If you do not have a user account, please register for the Hanser Customer Center.

» Do you already have a user account? Please log in here.
» Don't have a user account yet? Please register here.
Your wish lists
If you want to use your wish list during your next visit, simply log in. If you do not have a user account, please register for the Hanser Customer Center.
» Do you already have a user account? Please log in here.
» Don't have a user account yet? Please register here.

« Back

Your advantages at a glance

  • One login for all Hanser portals
  • Individual home page for faster access to preferred content
  • Exclusive access to selected content
  • Personal wish lists on all portals
  • Central management of your personal information and newsletter subscriptions

Register now
Deutsch
Bookmark Bookmarked
08-05-2008

Nanoscale Metal Coatings for Plastic Components

Here, a ping-pong ball with a nanometal coating supports a weight of 80kg for demonstration purposes.

Here, a ping-pong ball with a nanometal coating supports a weight of 80kg for demonstration purposes.

Together with the two Canadian companies Morph Technologies Inc. and Integran Technologies Inc. as well as PowerMetal Technologies, USA, DuPont Engineering Polymers has developed a new nanoscale metal/plastic hybrid technology. Using the MetaFuse process, a high-strength metal skin is deposited onto injection molded plastic parts. The average grain size of the nanocrystalline metals is about 20nm and is thus approximately 1000 times smaller than that of conventional metals. This permits production of high-strength plastic/metal hybrids with very thin coatings with a typical thickness of 25 to 200µm. In many practical applications, selective deposition of the nanoscale metal coating suffices to achieve the desired properties and coating of the entire part is not necessary.

Under bending and torsional loads, the greatest tensile and compressive stresses occur within the skin of the component. It is for this reason that the exceptional mechanical characteristics of the nanoscale metal coatings are most effective. This was confirmed by means of tests performed on tensile bars injection molded from PA66 with 25 wt.-% glass fiber reinforcement and coated with a 100-µm-thick nanocrystalline nickel-iron alloy. The flexural modulus and impact strength were two to four times higher than that of the uncoated plastic.

The nanometal/plastic hybrids also retain their very good mechanical properties at temperatures where the performance capabilities of purely plastic parts already start to decline significantly. For instance, the stiffness of test specimens with the nanometal coatings was still 70 to 80% of the initial room temperature value even after exceeding the glass-transition temperature. This means that MetaFuse will permit the use of plastics in high-load applications at elevated temperatures and raise the continuous service temperature of plastics by 50 to 75°C.

In addition the strength and stiffness, nanometal/plastic hybrids offer further benefits such as wear resistance, creep resistance, electrical conductivity, chemical resistance, electromagnetic screening, reduced permeability for gases and liquids as well as UV and hydrolysis resistance. This will open up a wide range of applications in automotive, consumer electronics, sporting goods and other areas.

Dr.-Ing. Harald Sambale
sambale <AT> kunststoffe.de

contact
DuPont de Nemours International S.A.
2, ch. du Pavillon
CH 1218 Le Grand-Saconnex
Tel: +41 22 7175-111
Fax: +41 22 7175-200


Newsletter

Would you like to subscribe to our Newsletters on plastics technology and profit from the latest information?

Subscribe here

Subscribe here