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Investigation of the adhesion promoter distribution in porous ceramic precursors

: Steier, V.; Koplin, C.; Kailer, A.; Reinecke, H.

Fulltext urn:nbn:de:0011-n-2125982 (1.2 MByte PDF)
MD5 Fingerprint: 92882f81c82b4d885afe1cf69acf9ec6
Created on: 23.4.2013

ISRN mechanical engineering. Online journal (2011), Artikel ID 304129; 9 pp.
ISSN: 2090-5130
ISSN: 2090-5122
DOI: 10.5402/ME
Journal Article, Electronic Publication
Fraunhofer IWM ()

The purpose of this paper is to improve the mechanical properties of polymer infiltrated ceramics (PICs) by the enhancement of the adhesion between both components. To improve the interface adhesion, an adhesion promoter (silane) was used. The silane distribution in the precursors was studied using Raman and IR spectroscopy. Inhomogeneous silane distribution was found after applying a common surface modification method. In this paper, different silane modification methods were developed. The methods differ in the manner of the infiltration solution, the point of silane activation, and the infiltration pressure. The impacts achieved by the use of these methods were analyzed, and different adhesion mechanisms between silane molecules and the ceramic surface were established. As a result, a unique infiltration method which generates homogeneous silane distributions was developed. The interface adhesion depends among other parameters on the silane amount on the surface. The adjustment of the silane amount in the precursor was realized by the use of IR-spectroscopy.