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Microwave Sintering of SiAlON Ceramics with TiN Addition

机译：添加TiN的SiAlON陶瓷的微波烧结

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α-β SiAlON/TiN composites with nominal composition of α:β = 25:75 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 660 W, 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-β SiAlON/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.%.
机译：通过微波烧结制备了标称成分为α：β= 25:75的α-βSiAlON / TiN复合材料。研究了氮化钛的添加对SiAlON基复合材料的相，微观结构，微波吸收能力和力学性能（维氏硬度和断裂韧性）的影响。为了评估最合适的实验设置，使用了时域有限差分（FDTD）软件进行了数值模拟。烧结试验是在运行于2.45 GHz，输出功率660 W的单模微波炉中进行的，反应时间为30分钟。 SiC块用作基座，通过混合加热来加速微波处理，同时减少了α-βSiAlON / TiN复合材料表面的热损失。在850°C下获得了最佳的综合机械性能，相对密度为96％，维氏硬度为12.98±1.81 GPa，维氏压痕断裂韧性为5.52±0.71 MPa.m 1/2 当TiN的含量为5重量％时。

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