α-β SiAlON/TiN composites with nominal composition of α:= β25:75 were fabricated by microwave sintering. The effect of titanium nitride addition on the phases, microstructure, microwave absorption ability and mechanical properties (Vickers hardness and fracture toughness) of the SiAlON-based composites were studied. Finite Difference Time Domain (FDTD) software was used for the numerical simulation in order to assess the most suitable experimental setup. Sintering trials were performed in a single mode microwave furnace operating at 2.45 GHz and a power output of 660W, for a reaction time of 30 min. SiC blocks were used as a susceptor to accelerate the microwave processing by hybrid heating, with reduced heat losses from the surface of the material of the α- βSiAlON/TiN composites. The optimum comprehensive mechanical properties, corresponding to a relative density of 96%, Vickers hardness of 12.98 ± 1.81 GPa and Vickers indentation fracture toughness of 5.52 ± 0.71 MPa.m1/2 were obtained at 850°C when the content of TiN was 5 wt.%.

Microwave sintering of SiAlON ceramics with TiN addition / Canarslan, O. S.; Rosa, R.; Koroglu, L.; Ayas, E.; Kara, A.; Veronesi, P.. - In: MATERIALS. - ISSN 1996-1944. - 12:8(2019), pp. 1345-1358. [10.3390/ma12081345]

Microwave sintering of SiAlON ceramics with TiN addition

Rosa R.;Veronesi P.
2019

Abstract

α-β SiAlON/TiN composites with nominal composition of α:= β25:75 were fabricated by microwave sintering. The effect of titanium nitride addition on the phases, microstructure, microwave absorption ability and mechanical properties (Vickers hardness and fracture toughness) of the SiAlON-based composites were studied. Finite Difference Time Domain (FDTD) software was used for the numerical simulation in order to assess the most suitable experimental setup. Sintering trials were performed in a single mode microwave furnace operating at 2.45 GHz and a power output of 660W, for a reaction time of 30 min. SiC blocks were used as a susceptor to accelerate the microwave processing by hybrid heating, with reduced heat losses from the surface of the material of the α- βSiAlON/TiN composites. The optimum comprehensive mechanical properties, corresponding to a relative density of 96%, Vickers hardness of 12.98 ± 1.81 GPa and Vickers indentation fracture toughness of 5.52 ± 0.71 MPa.m1/2 were obtained at 850°C when the content of TiN was 5 wt.%.
2019
12
8
1345
1358
Microwave sintering of SiAlON ceramics with TiN addition / Canarslan, O. S.; Rosa, R.; Koroglu, L.; Ayas, E.; Kara, A.; Veronesi, P.. - In: MATERIALS. - ISSN 1996-1944. - 12:8(2019), pp. 1345-1358. [10.3390/ma12081345]
Canarslan, O. S.; Rosa, R.; Koroglu, L.; Ayas, E.; Kara, A.; Veronesi, P.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1204922
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