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A bulk metal/ceramic composite material with a cellular structure

机译:具有多孔结构的块状金属/陶瓷复合材料

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摘要

A bulk metal/ceramic composite material with a honeycomb-like micro-ceil structure has been prepared by sintering the spherical Al_(90)Mn_9Ce_1 alloy powders clad by Al_2O_3 nano-powder with the spark plasma sintering (SPS) technique. The as-prepared material consists of Al_(90)Mn_9Ce_1 alloy cell and closed Al_2O_3ceramic ceil wall. The diameter of the ceils is about 20-40 mum, while a thickness of the cell wall is about 1 -2 mum. The ultimate compressive strength of the as-sintered materials is about 514 MPa, while its fracture strain is up to about 0.85 percent. This composite material might possess good anti-corrosion, thermal endurance and other potential properties due to its unique microstructure. The result shows that the Al_(90)Mn_9Ce_1/Al_2O_3 composite powders can be sintered by spark plasma sintering technique despite the large difference in their sintering temperature. This work offers a way of designing and preparing metal/ceramic composite material with functional property.
机译:通过用火花等离子体烧结(SPS)技术烧结包覆有Al_2O_3纳米粉的球形Al_(90)Mn_9Ce_1合金粉末,制备了具有蜂窝状微孔结构的块状金属/陶瓷复合材料。所制备的材料由Al_(90)Mn_9Ce_1合金晶胞和封闭的Al_2O_3陶瓷细胞壁组成。细胞的直径约为20-40μm,而细胞壁的厚度约为1-2μm。烧结后材料的极限抗压强度约为514 MPa,而其断裂应变高达约0.85%。这种复合材料由于其独特的微观结构而可能具有良好的防腐性,耐热性和其他潜在性能。结果表明,尽管烧结温度相差很大,Al_(90)Mn_9Ce_1 / Al_2O_3复合粉末仍可以通过火花等离子体烧结技术进行烧结。这项工作提供了一种设计和制备具有功能特性的金属/陶瓷复合材料的方法。

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