1 / 9

Importance of Surface and Interface Characterization

Investigation of Surface – Related Adhesion Failure. Importance of Surface and Interface Characterization. Dr. Amir Hussain, Christa Pflugbeil COMTECH GmbH - Labor für Kunststoffe comtech-labor.de, info@comtech-labor.de . Materials and Surfaces.

davis
Download Presentation

Importance of Surface and Interface Characterization

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Investigation of Surface – Related Adhesion Failure Importance of Surface and Interface Characterization Dr. Amir Hussain, Christa PflugbeilCOMTECH GmbH - Labor für Kunststoffecomtech-labor.de, info@comtech-labor.de

  2. Materials and Surfaces „Materials are indifferent, but the use we make of them is not a matter of indifference.“ (Epictetus 50 - 100 AD) „GOD made materials but surfaces were the work of the DEVIL“ (Pauli)

  3. Typical Structure of a Substrate Surface • Contaminations ca. 2-4 nm eg. Grease, Wax, Oil, Silicone, Tenside • Adsorbed Layers ca. 0,5-1 nm eg. Hydrocarbon, CO2 , H2O • Reacted Layers ca. 3-7 nm eg. Me-O, Me-O-H • Bulk Material

  4. Scope and Limits of Surface Analytical Techniques

  5. Lubricants / Contaminations detected on failed coating at the steel-FBE-interface • Silocones (PDMS) • Stearates / Fat • Stearmide

  6. Typical Contaminations on a Disbonded Interface (sample A) detected by ToFSIMS

  7. Typical Contaminations on a Disbonded Interface (sample A) detected by ToFSIMS

  8. Surface Contamination • Surface Contamination is the most dangerous enemy of surface engeneering • A controlled (pretreated) surface is more important than a perfect clean one • Surface Analysis is the most effectice weapon against this enemy

  9. Main Causes of Adhesive Failure in protective Coatings • 65% Surface / Interface • 20% Applications • 15% Materials

More Related