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Ultra-fine grain Sialon-based ceramic material with high-temperature plasticity and preparation method of ultra-fine grain Sialon-based ceramic material
The invention provides an ultra-fine grain Sialon-based ceramic material with high-temperature plasticity and a preparation method thereof, and belongs to the technical field of ceramic materials. According to the preparation method, a GH4169 high-temperature alloy metal sintering aid and Y2O3 and Al2O3 inorganic oxide sintering aids are used as a composite sintering aid, and in the liquid-phase sintering aiding stage, the composite sintering aid forms a staged sintering densification process according to different melting point temperatures, so that liquid-phase sintering of the Sialon ceramic material is promoted, the densification process is accelerated, and the sintering temperature of the Sialon-based ceramic is reduced. Meanwhile, in a liquid phase mainly comprising GH4169 high-temperature alloy, Cr, Fe, Ni, Nb and Mo elements contained in the GH4169 high-temperature alloy are gathered towards a grain boundary and react with part of free Si elements, an intergranular glass phasewith a low melting point is easily formed at the grain boundary, and the prepared ultra-fine grain Sialon-based ceramic has high-temperature plasticity.
本发明提供了一种具有高温塑性的超细晶Sialon基陶瓷材料及其制备方法，属于陶瓷材料技术领域。本发明以GH4169高温合金金属烧结助剂、Y2O3和Al2O3无机氧化物烧结助剂作为复合烧结助剂，在液相助烧阶段，复合烧结助剂根据熔点温度的不同形成分阶段烧结致密化过程，促进Sialon陶瓷材料的液相烧结，加速致密化进程，降低Sialon基陶瓷的烧结温度。同时在以GH4169高温合金为主的液相中，其所包含的Cr、Fe、Ni、Nb、Mo元素向晶界聚集，并与部分游离的Si元素反应，易在晶界处形成熔点较低的晶间玻璃相，使制备的超细晶Sialon基陶瓷具备高温塑性。
Ultra-fine grain Sialon-based ceramic material with high-temperature plasticity and preparation method of ultra-fine grain Sialon-based ceramic material
The invention provides an ultra-fine grain Sialon-based ceramic material with high-temperature plasticity and a preparation method thereof, and belongs to the technical field of ceramic materials. According to the preparation method, a GH4169 high-temperature alloy metal sintering aid and Y2O3 and Al2O3 inorganic oxide sintering aids are used as a composite sintering aid, and in the liquid-phase sintering aiding stage, the composite sintering aid forms a staged sintering densification process according to different melting point temperatures, so that liquid-phase sintering of the Sialon ceramic material is promoted, the densification process is accelerated, and the sintering temperature of the Sialon-based ceramic is reduced. Meanwhile, in a liquid phase mainly comprising GH4169 high-temperature alloy, Cr, Fe, Ni, Nb and Mo elements contained in the GH4169 high-temperature alloy are gathered towards a grain boundary and react with part of free Si elements, an intergranular glass phasewith a low melting point is easily formed at the grain boundary, and the prepared ultra-fine grain Sialon-based ceramic has high-temperature plasticity.
本发明提供了一种具有高温塑性的超细晶Sialon基陶瓷材料及其制备方法，属于陶瓷材料技术领域。本发明以GH4169高温合金金属烧结助剂、Y2O3和Al2O3无机氧化物烧结助剂作为复合烧结助剂，在液相助烧阶段，复合烧结助剂根据熔点温度的不同形成分阶段烧结致密化过程，促进Sialon陶瓷材料的液相烧结，加速致密化进程，降低Sialon基陶瓷的烧结温度。同时在以GH4169高温合金为主的液相中，其所包含的Cr、Fe、Ni、Nb、Mo元素向晶界聚集，并与部分游离的Si元素反应，易在晶界处形成熔点较低的晶间玻璃相，使制备的超细晶Sialon基陶瓷具备高温塑性。
Ultra-fine grain Sialon-based ceramic material with high-temperature plasticity and preparation method of ultra-fine grain Sialon-based ceramic material
一种具有高温塑性的超细晶Sialon基陶瓷材料及其制备方法
LUO JUNTING (author) / XI CHENYANG (author) / WANG HAOTIAN (author) / ZHANG LILI (author) / ZHANG CHUNXIANG (author)
2020-11-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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