Composite coatings on ceramic tiles have been produced by plasma-spraying waste glass powders together with alumina as reinforcing phase. Obtaining a tough coating, in which a high amount of waste glass can be recycled, is the aim of the study. Glass powders with different particle size distributions were tested; coatings with increasing glass volume fractions (0%, 20%, 40%, 60%, 80%, 100%) were sprayed. Furthermore, two different kinds of alumina feedstocks were employed, namely, a commercial plasma-spray powder and a more economical laboratory manufactured spray-dried powder. Vickers microhardness, fracture toughness and abrasion resistance have been measured. The coatings were tested both in as-sprayed condition and after a thermal treatment. An abrasion resistance comparable to common industrial glazes has been obtained with as much as 60% of glass volume fraction, employing fine glass powders (< 45 mu m). No significant decrease in mechanical proper-ties has been noticed replacing the commercial alumina powder with the spray-dried one. (c) 2005 Elsevier B.V. All rights reserved.
|Data di pubblicazione:||2006|
|Titolo:||Glass-alumina composite coatings by plasma spraying. Part I: Microstructural and mechanical characterization|
|Autore/i:||G. BOLELLI; V. CANNILLO; L. LUSVARGHI; T. MANFREDINI|
|Codice identificativo ISI:||WOS:000240616600063|
|Codice identificativo Scopus:||2-s2.0-33746113769|
|Tipologia||Articolo su rivista|
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