Nanosized microstructure of Al2O3–ZrO2 (Y2O3) eutectics fabricated by laser engineered net shaping

Nanosized microstructure of Al2O3–ZrO2 (Y2O3) eutectics fabricated by laser engineered net shaping

Cylindrical and arc-shaped Al2O3–ZrO2 (Y2O3) eutectic ceramic structures without any binders were directly fabricated by laser engineered net shaping from pure powders. During the process, mixed ceramic powders are completely melted at the required position by a high-energy laser beam, yielding full...

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Veröffentlicht in:Scripta materialia 2015, Vol.95, p.39-41
Hauptverfasser: Niu, Fangyong, Wu, Dongjiang, Ma, Guangyi, Wang, Jiangtian, Guo, Minhai, Zhang, Bi
Format: Artikel
Sprache:eng
Schlagworte:
Al2O3–ZrO2
Ceramic powders
Ceramics
Eutectic solidification
Eutectics
Hardness test
Laser beams
Laser deposition
Lasers
Microstructure
Nanostructure
Yttrium oxide
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Beschreibung
Zusammenfassung:Cylindrical and arc-shaped Al2O3–ZrO2 (Y2O3) eutectic ceramic structures without any binders were directly fabricated by laser engineered net shaping from pure powders. During the process, mixed ceramic powders are completely melted at the required position by a high-energy laser beam, yielding fully dense ceramic with fine-grained microstructure in which the eutectic spacing is ∼100nm. The average microhardness and fracture toughness of the produced ceramic are 17.15 GPa and 4.79MPa·m1/2, respectively.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2014.09.026