Abstrakti
Hybrid material systems, such as combinations of tungsten foils and carbon fibre-reinforced plastic (CFRP), are replacing metal alloy concepts in spacecraft enclosures. However, a good adhesion between the tungsten oxide scale and the epoxy resin used is required. Here, the effects of a hydrofluoric-nitric-sulphuric-acid (HFNS) treatment on tungsten oxides and subsequent adhesion to CFRP are analysed using atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and fracture testing. The work shows that HFNS treatment results in decreased oxygen content, over 50% thinner tungsten trioxide (WO3) layer and increased nano-roughness on thin tungsten foils. Fracture testing established a 39% increase in the average critical strain for tungsten-CFRP specimens after HFNS treatment was carried out on tungsten. The effect of the oxide scale modification regarding the critical strain energy release rate was Delta Gc approximate to 8.4 J/m(2). (C) 2014 Elsevier By. All rights reserved.
Alkuperäiskieli | Englanti |
---|---|
Sivut | 418-427 |
Sivumäärä | 10 |
Julkaisu | Applied Surface Science |
Vuosikerta | 328 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 15 helmik. 2015 |
OKM-julkaisutyyppi | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä |
Julkaisufoorumi-taso
- Jufo-taso 1