Development of multi-walled carbon nanotubes-based coatings on carbon-bonded alumina filters for steel melt filtration. Issue 5 (May 2015)

• Record Type: Journal Article
• Authors: Storti, Enrico; Emmel, Marcus; Dudczig, Steffen; Colombo, Paolo; Aneziris, Christos G.
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 5(2015:May)
• Page Start: 1569
• Page End: 1580
• Publication Date: 2015-05
• Subjects: Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2014.11.026
• Languages: English
• ISSNs: 0955-2219

Abstract

<abstract abstract-type="author" id="abs0005"> <title id="sect0005">Abstract</title> <sec> <p id="spar0005">Ceramic foam filters (CFFs) have been used by steel foundries for several years to remove non-metallic inclusions from the metal castings. In order to improve their filtration efficiency, promising approaches which involve "active" and "reactive" coatings applied on the filters have recently been proposed.</p> <p id="spar0010">In this work, a new coating system containing multi-walled carbon nanotubes (MWCNTs) is presented. A special water-based dispersing technique for carbon nanotubes was developed. Xanthan gum was used both as a dispersing agent and as a rheology modifier for the spraying slurries. The synthetic coal tar pitch Carbores^® P was added as a binder for the carbon nanotubes. The coatings were cold-applied on 10 pores per inch (ppi) carbon-bonded alumina filters previously manufactured via the Schwartzwalder process. After drying, the samples were heat treated at 800 °C. The performance of the coated filters was investigated with the aid of a special steel casting simulator in fully-controlled atmosphere.</p> </sec> </abstract>