| Title |
Mining tailings as a raw material for glass-bonded thermally sprayed ceramic coatings: Microstructure and properties |
| ID_Doc |
25251 |
| Authors |
Karhu, M; Lagerbom, J; Honkanen, M; Huttunen-Saarivirta, E; Kiilakoski, J; Vuoristo, P; Solismaa, S; Kivikyto-Reponen, P |
| Title |
Mining tailings as a raw material for glass-bonded thermally sprayed ceramic coatings: Microstructure and properties |
| Year |
2020 |
| Published |
Journal Of The European Ceramic Society, 40, 12 |
| DOI |
10.1016/j.jeurceramsoc.2020.04.038 |
| Abstract |
Magnesium aluminate, MgAl2O4, spinel powders for thermal spraying, were synthesized from secondary raw materials by spray drying and subsequent reaction sintering. Talc ore mining tailings and aluminium hydroxide precipitate from aluminium anodizing process were studied. A stoichiometric MgAl2O4 spinel coating was prepared as a reference using pure raw materials. Atmospheric plasma spraying resulted in the formation of ceramic coatings. Microstructural investigations revealed that the reference coatings exhibited crystalline lamellar microstructure of MgAl(2)O(4 )but secondary coatings contained amorphous areas between the crystalline MgAl2O4 clusters. Abrasive wear test results revealed considerably lower wear rate for secondary coatings. It is suggested that the different structure of coatings, particularly the high degree of amorphous phase between the isolated crystalline MgAl2O4 clusters caused the higher abrasive wear resistance by changing the wear mechanism. The dielectric breakdown strength of the secondary coatings were at the same level, 24 V/mu m, as compared to reference coating, 23 V/mu m. |
| Author Keywords |
MgAl2O4 spinel; Mining tailings; Circular economy; Thermal spray; Ceramic coating |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000541149500034 |
| WoS Category |
Materials Science, Ceramics |
| Research Area |
Materials Science |
| PDF |
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