Selected mechanical properties and microstructure of Al₂O₃ZrO_2nano ceramic composites

• Autorzy: Szutkowska M. , Smuk B. , Kalinka A. , Czechowski K. , Bućko M. , Boniecki M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Basic mechanical properties of the studied tool materials and microstructure of alumina-zirconia ceramic composites with fraction of nanopowders have been presented. Design/methodology/approach: The present study reports selected properties obtained by reinforcing Al₂O₃ with 15 wt% ZrO₂ (partially stabilized with Y₂O₃-Y5) and, non-stabilized zirconia. Specimens were prepared based on submicro- and nano-scale trade powders. Vickers hardness (HV1), wear resistance and fracture toughness (K_IC) at room and elevated temperatures characteristic for tool work were evaluated. Microstructure was observed by means of a scanning electron microscopy (SEM). Preliminary industrial cutting tests in the turning of higher-quality carbon steel C45 grade were carried out. Findings: The addition of nanopowders does not result in a significant improvement in fracture toughness at room temperature. A reduction in fracture toughness of K_IC(_ET) by approximately 20% is observed at elevated temperature (1073 K) for the specimen only with submicro powders in comparison to that at room temperature. Addition of the powder mixture in submicron and nano scale size reveals the minor reduction of fracture toughness (up to 10%) at elevated temperature. Practical implications: The results show that using of powders in submicron and nano scale size not improve the tool life but influences the fracture toughness et elevated temperatures. Originality/value: The results of the presented investigations allow rational use of existing ceramic tools.

Słowa kluczowe

EN

Al2O3-ZrO2nano ceramics; indentation fracture toughness; vickers hardness; SEM image

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2011
• Tom: Vol. 48, nr 1
• Strony: 58--63
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Szutkowska M.

• Institute of Technology, Pedagogical University, ul. Podchorążych 2, 30-084 Kraków, Poland
• Centre of Materials Engineering and Sintering Techniques, Institute of Advanced Manufacturing Technology, ul. Wrocławska 37a, 30-011 Kraków, Poland

autor

Smuk B.

• Centre of Materials Engineering and Sintering Techniques, Institute of Advanced Manufacturing Technology, ul. Wrocławska 37a, 30-011 Kraków, Poland

autor

Kalinka A.

• Centre of Materials Engineering and Sintering Techniques, Institute of Advanced Manufacturing Technology, ul. Wrocławska 37a, 30-011 Kraków, Poland

autor

Czechowski K.

• Centre of Materials Engineering and Sintering Techniques, Institute of Advanced Manufacturing Technology, ul. Wrocławska 37a, 30-011 Kraków, Poland

autor

Bućko M.

• Department of Materials Engineering and Ceramics, University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland

autor

Boniecki M.

• Department of Ceramics, Institute of Electronic Materials Technology, ul. Wólczyńska 133, 01-919 Warszawa, Poland

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