Wear Resistance of B<sub>4</sub>C-TiB<sub>2</sub> Ceramic Composite
The effects of microstructure and mechanical properties on the wear resistance of B<sub>4</sub>C-TiB<sub>2</sub> ceramic composite were studied. The composite was hot pressed from a B<sub>4</sub>C-TiO<sub>2</sub> precursor at a temperature range of 180...
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MDPI AG
2025-01-01
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| author | Pavol Švec |
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| description | The effects of microstructure and mechanical properties on the wear resistance of B<sub>4</sub>C-TiB<sub>2</sub> ceramic composite were studied. The composite was hot pressed from a B<sub>4</sub>C-TiO<sub>2</sub> precursor at a temperature range of 1800 and 1850 °C. Both the relative density and amount of TiB<sub>2</sub> secondary phase of the B<sub>4</sub>C-TiB<sub>2</sub> composite increased with the amount of TiO<sub>2</sub> sintering additive in B<sub>4</sub>C-TiO<sub>2</sub> precursor. The hardness of the composite increased with a secondary phase portion up to 29.8 vol.% TiB<sub>2</sub>. However, the positive effect of TiB<sub>2</sub> secondary phase on the fracture toughness of B<sub>4</sub>C-TiB<sub>2</sub> composite was measured in the complete experimental range, with the highest average attained value of 7.51 MPa·m<sup>1/2</sup>. The wear resistance of B<sub>4</sub>C-TiB<sub>2</sub> composite increased with both the hardness and fracture toughness. The best wear resistance was achieved with the composite with a higher hardness value of 29.74 GPa. This sample consisted of 29.8 vol.% TiB<sub>2</sub> secondary phase and reached a fracture toughness value of 6.91 MPa·m<sup>1/2</sup>. The fracture-induced mechanical wear of B<sub>4</sub>C-TiB<sub>2</sub> composite was the main wear mechanism during the pin-on-disc wear test. Transgranular fracture with pullout of the surface and micro-crack formation in the direction perpendicular to the wear direction was observed on the worn surfaces. |
| format | Article |
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| institution | Kabale University |
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| publishDate | 2025-01-01 |
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| series | Lubricants |
| spelling | doaj-art-4a6a0dac638241289600cec8c1c6a5702025-01-24T13:39:03ZengMDPI AGLubricants2075-44422025-01-011313510.3390/lubricants13010035Wear Resistance of B<sub>4</sub>C-TiB<sub>2</sub> Ceramic CompositePavol Švec0Institute of Technologies and Materials, Faculty of Mechanical Engineering, Slovak University of Technology in Bratislava, 812 31 Bratislava, SlovakiaThe effects of microstructure and mechanical properties on the wear resistance of B<sub>4</sub>C-TiB<sub>2</sub> ceramic composite were studied. The composite was hot pressed from a B<sub>4</sub>C-TiO<sub>2</sub> precursor at a temperature range of 1800 and 1850 °C. Both the relative density and amount of TiB<sub>2</sub> secondary phase of the B<sub>4</sub>C-TiB<sub>2</sub> composite increased with the amount of TiO<sub>2</sub> sintering additive in B<sub>4</sub>C-TiO<sub>2</sub> precursor. The hardness of the composite increased with a secondary phase portion up to 29.8 vol.% TiB<sub>2</sub>. However, the positive effect of TiB<sub>2</sub> secondary phase on the fracture toughness of B<sub>4</sub>C-TiB<sub>2</sub> composite was measured in the complete experimental range, with the highest average attained value of 7.51 MPa·m<sup>1/2</sup>. The wear resistance of B<sub>4</sub>C-TiB<sub>2</sub> composite increased with both the hardness and fracture toughness. The best wear resistance was achieved with the composite with a higher hardness value of 29.74 GPa. This sample consisted of 29.8 vol.% TiB<sub>2</sub> secondary phase and reached a fracture toughness value of 6.91 MPa·m<sup>1/2</sup>. The fracture-induced mechanical wear of B<sub>4</sub>C-TiB<sub>2</sub> composite was the main wear mechanism during the pin-on-disc wear test. Transgranular fracture with pullout of the surface and micro-crack formation in the direction perpendicular to the wear direction was observed on the worn surfaces.https://www.mdpi.com/2075-4442/13/1/35ceramic compositeboron carbidetitanium diboridewearhardnessfracture toughness |
| spellingShingle | Pavol Švec Wear Resistance of B<sub>4</sub>C-TiB<sub>2</sub> Ceramic Composite Lubricants ceramic composite boron carbide titanium diboride wear hardness fracture toughness |
| title | Wear Resistance of B<sub>4</sub>C-TiB<sub>2</sub> Ceramic Composite |
| title_full | Wear Resistance of B<sub>4</sub>C-TiB<sub>2</sub> Ceramic Composite |
| title_fullStr | Wear Resistance of B<sub>4</sub>C-TiB<sub>2</sub> Ceramic Composite |
| title_full_unstemmed | Wear Resistance of B<sub>4</sub>C-TiB<sub>2</sub> Ceramic Composite |
| title_short | Wear Resistance of B<sub>4</sub>C-TiB<sub>2</sub> Ceramic Composite |
| title_sort | wear resistance of b sub 4 sub c tib sub 2 sub ceramic composite |
| topic | ceramic composite boron carbide titanium diboride wear hardness fracture toughness |
| url | https://www.mdpi.com/2075-4442/13/1/35 |
| work_keys_str_mv | AT pavolsvec wearresistanceofbsub4subctibsub2subceramiccomposite |