Diamond composites with nanoceramic boride bonding phases

• Autorzy: Szutkowska M. , Jaworska L. , Rozums M. , Klimczyk P. , Bucko M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: Basic mechanical properties of the studied tool composites and microstructure of diamond- titanium diboride composite, and diamond-titanium diboride-titanium nitride composite with participation of nanopowders have been presented. Design/methodology/approach: Composites were prepared on the basis diamond powders of 3-6 Μ (MDA36, Element Six) and the TiB2/TiN nanopowders of below 45 nm (Neomat Co. Lithuania firm) and nanopowder of TiB2 with size of crystallite below of 100 nm (American Elements firm). Different amount of a bonding phase changing in range from 10 to 30 wt% was used. Compacts in the shape of disc with dimension ∅15x5 mm were sintered at pressure 8.0�}0.2 GPa and temperature of 2235 K using the Bridgman type apparatus. Microstructure studies using scanning microscope, X-ray and electron diffraction phase analysis were used. Findings: The influence of the bonding phase amount on the tested properties was observed. Vicker�fs hardness HV1 was changed in the range from 20.0 to 50.0 GPa, Young�fs modulus (E) from 360 to 600 GPa and density (�Ď) from 3.30 to 3.63 g/cm3. The highest values of Vickers hardness and Young�fs modulus were obtained for diamond composites sintered with 10 wt% TiB2 of bonding phase. Practical implications: In this work the effect of reduction powder size from submicron scale to nano scale of two ceramic bonding phases: titanium diboride and titanium diboride-nitride in diamond composites on selected mechanical properties has been reported. The results show that using of the TiB2 powders in nano scale size increase the Vicker�fs hardness about 30 wt% in comparison to using of the TiB2/TiN phase. Originality/value: These investigations allow enhance possibility of using this materials as burnishing tools and rational use of existing ceramic tools.

Słowa kluczowe

EN

nanopowders; wear resistance; SEM image; Vicker’s method

PL

nanoproszki; odporność na ścieranie; obraz SEM; metoda Vickersa

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2012
• Tom: Vol. 53, nr 2
• Strony: 85--91
• Opis fizyczny: Bibliogr. 17 poz.

Twórcy

autor

Szutkowska M.

autor

Jaworska L.

autor

Rozums M.

autor

Klimczyk P.

autor

Bucko M.

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

Bibliografia

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