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Machinability and properties of zirconia ceramics prepared by gelcasting method

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Date
2020-08-17
Author
Kaštyl, Jaroslav
Chlup, Zdeněk
Šťastný, Přemysl
Trunec, Martin
Altmetrics
10.1080/17436753.2019.1675402
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Abstract
The machinability of newly developed zirconia ceramics for computer numerically controlled milling (CNC) was investigated. The zirconia blanks were prepared by the gelcasting method and tested in the green and two pre-sintered states. All blanks exhibited uniform sintering shrinkage in all directions. The blanks were investigated from the viewpoint of surface milling roughness, quality of milled edges and sharp tips, and machinability of thin structures. The best milling results were obtained for the blanks pre-sintered at 900?C/1?h. Mechanical properties of zirconia blanks, such as biaxial flexural strength, microhardness, indentation elastic modulus, and fracture toughness were determined in the green and pre-sintered states (900 and 1100?C/1?h) and the correlation with the milling results was discussed. The biaxial strength tests of sintered discs showed the advantage of optimised surface milling over conventional polishing.
Keywords
Zirconia, gelcasting, pre-sintering, machinability, CNC milling, mechanical properties
Persistent identifier
http://hdl.handle.net/11012/181089
Document type
Peer reviewed
Document version
Preprint
Source
Advances in Applied Ceramics. 2020, vol. 119, issue 5-6 , p. 252-260.
https://www.tandfonline.com/doi/full/10.1080/17436753.2019.1675402
DOI
10.1080/17436753.2019.1675402
Collections
  • Pokročilé keramické materiály [39]
  • Ústav materiálových věd a inženýrství [87]
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