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High-density hexagonal boron nitride-based solid lubricating composite material and preparation method thereof
The invention discloses a high-density hexagonal boron nitride-based solid lubricating composite material. The preparation method comprises the following steps: carrying out wet ball milling on h-BN,SiC and a composite sintering aid in a WC ball milling tank to obtain powder, drying, screening, putting the powder into a graphite mold, pre-pressing, putting the pre-pressed sample and the graphitemold into a spark plasma sintering furnace, carrying out high-temperature and high-pressure sintering, cooling to room temperature along with the furnace, and burnishing and polishing the obtained billet sample to obtain the hexagonal boron nitride-based composite material. According to the invention, by using a spark plasma sintering technology, the sintering temperature of a hexagonal boron nitride ceramic is remarkably reduced, and the hexagonal boron nitride-based composite material block with a density of more than 95% can be obtained at a low temperature within a short time, so that thepreparation cost is saved, and the preparation efficiency is improved; by introducing a silicon carbide reinforced phase, the hardness of the composite material is improved; and the composite materialhas good lubricating property at room temperature to 900 DEG C, and can be used for lubricating and sealing members of mechanical moving parts in a high-temperature environment.
本发明公开了一种高致密度六方氮化硼基固体润滑复合材料，是将‑BN、SiC及复合烧结助剂于WC球磨罐中湿法球磨获得粉料，烘干，过筛后将粉料放入石墨模具中先预压，再将预压样与石墨模具一起装入放电等离子烧结炉中高温高压烧结，然后随炉冷却至室温，得到的毛坯样经打磨、抛光，即得六方氮化硼基复合材料。本发明采用放电等离子烧结技术，显著降低了六方氮化硼陶瓷的烧结温度，在较低温度、较短时间内可获得致密度达到95%以上的六方氮化硼基复合材料块体，节约制备成本，提高制备效率；引入碳化硅增强相，提高了复合材料的硬度；该复合材料在室温至900C内具有良好的润滑性能，可用于高温环境中机械运动部件的润滑和密封件。
High-density hexagonal boron nitride-based solid lubricating composite material and preparation method thereof
The invention discloses a high-density hexagonal boron nitride-based solid lubricating composite material. The preparation method comprises the following steps: carrying out wet ball milling on h-BN,SiC and a composite sintering aid in a WC ball milling tank to obtain powder, drying, screening, putting the powder into a graphite mold, pre-pressing, putting the pre-pressed sample and the graphitemold into a spark plasma sintering furnace, carrying out high-temperature and high-pressure sintering, cooling to room temperature along with the furnace, and burnishing and polishing the obtained billet sample to obtain the hexagonal boron nitride-based composite material. According to the invention, by using a spark plasma sintering technology, the sintering temperature of a hexagonal boron nitride ceramic is remarkably reduced, and the hexagonal boron nitride-based composite material block with a density of more than 95% can be obtained at a low temperature within a short time, so that thepreparation cost is saved, and the preparation efficiency is improved; by introducing a silicon carbide reinforced phase, the hardness of the composite material is improved; and the composite materialhas good lubricating property at room temperature to 900 DEG C, and can be used for lubricating and sealing members of mechanical moving parts in a high-temperature environment.
本发明公开了一种高致密度六方氮化硼基固体润滑复合材料，是将‑BN、SiC及复合烧结助剂于WC球磨罐中湿法球磨获得粉料，烘干，过筛后将粉料放入石墨模具中先预压，再将预压样与石墨模具一起装入放电等离子烧结炉中高温高压烧结，然后随炉冷却至室温，得到的毛坯样经打磨、抛光，即得六方氮化硼基复合材料。本发明采用放电等离子烧结技术，显著降低了六方氮化硼陶瓷的烧结温度，在较低温度、较短时间内可获得致密度达到95%以上的六方氮化硼基复合材料块体，节约制备成本，提高制备效率；引入碳化硅增强相，提高了复合材料的硬度；该复合材料在室温至900C内具有良好的润滑性能，可用于高温环境中机械运动部件的润滑和密封件。
High-density hexagonal boron nitride-based solid lubricating composite material and preparation method thereof
一种高致密度六方氮化硼基固体润滑复合材料及其制备方法
YANG JUN (Autor:in) / LIU WEIMIN (Autor:in) / CHEN JUANJUAN (Autor:in) / CHENG JUN (Autor:in) / ZHU SHENGYU (Autor:in) / TAN HUI (Autor:in)
14.04.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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