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首页> 外文期刊>Journal of Advanced Ceramics >Spark plasma sintering of damage tolerant and machinable YAM ceramics
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Spark plasma sintering of damage tolerant and machinable YAM ceramics

机译:耐损伤和可机加工的YAM陶瓷的火花等离子烧结

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摘要

Single-phase Y4Al2O9 (YAM) powders were synthesized via solid-state reaction starting from nano-sized Al2O3 and Y2O3. Fully dense (99.5%) bulk YAM ceramics were consolidated by spark plasma sintering (SPS) at 1800 °C. We demonstrated the excellent damage tolerance and good machinability of YAM ceramics. Such properties are attributed to the easy slipping along the weakly bonded crystallographic planes, resulting in multiple energy dissipation mechanisms such as transgranular fracture, shear slipping and localized grain crushing.
机译:通过固相反应从纳米Al2O3和Y2O3开始合成了单相Y4Al2O9(YAM)粉末。在1800°C下通过火花等离子体烧结(SPS)固结了全密度(99.5%)的块状YAM陶瓷。我们证明了YAM陶瓷具有出色的抗损伤性和良好的切削性。这些性质归因于沿弱结合晶体平面的易滑移,从而导致多种能量耗散机制,如穿晶断裂,剪切滑移和局部晶粒破碎。

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