A bulk metal/ceramic composite material with a honeycomb-like micro-cell structure has been prepared by sintering the spherical Al90Mn9Ce1 alloy powders clad by Al2O3 nano-powder with the spark plasma sintering (SPS) ...A bulk metal/ceramic composite material with a honeycomb-like micro-cell structure has been prepared by sintering the spherical Al90Mn9Ce1 alloy powders clad by Al2O3 nano-powder with the spark plasma sintering (SPS) technique. The as-prepared material consists of Al90Mn9Ce1 alloy cell and closed Al2O3 ceramic cell wall. The diameter of the cells is about 20―40 μm, while a thickness of the cell wall is about 1―2 μm. The ultimate compressive strength of the as-sintered materials is about 514 MPa, while its fracture strain is up to about 0.65 %. This composite material might possess good anti-corrosion, thermal endurance and other potential properties due to its unique microstructure. The result shows that the Al90Mn9Ce1/Al2O3 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.展开更多
为了充分发挥陶瓷和金属的各自优势 ,同时避免它们的各自劣势 ,文章采用鲜有报道的多孔陶瓷骨架压渗工艺制备双连续相金属 /陶瓷复合材料。首先采用有机泡沫浸渍法制备 Si C多孔陶瓷骨架 ,然后将纯金属 A l压渗到骨架中 ,为了改善压渗效...为了充分发挥陶瓷和金属的各自优势 ,同时避免它们的各自劣势 ,文章采用鲜有报道的多孔陶瓷骨架压渗工艺制备双连续相金属 /陶瓷复合材料。首先采用有机泡沫浸渍法制备 Si C多孔陶瓷骨架 ,然后将纯金属 A l压渗到骨架中 ,为了改善压渗效果 ,还对助渗剂进行研究。结果表明 ,纯金属 A l可以压渗进入陶瓷骨架中 ,使用助渗剂可得到更好的效果。该材料应用前须进一步改善压渗工艺 。展开更多
基金This work was supported by the China Postdoctoral Science Foundation(No.2003033133)the Basic Science Research Foundation of Tsinghua University(Grant No.091201107)the National Center for Nanoscience and Technology of China.
文摘A bulk metal/ceramic composite material with a honeycomb-like micro-cell structure has been prepared by sintering the spherical Al90Mn9Ce1 alloy powders clad by Al2O3 nano-powder with the spark plasma sintering (SPS) technique. The as-prepared material consists of Al90Mn9Ce1 alloy cell and closed Al2O3 ceramic cell wall. The diameter of the cells is about 20―40 μm, while a thickness of the cell wall is about 1―2 μm. The ultimate compressive strength of the as-sintered materials is about 514 MPa, while its fracture strain is up to about 0.65 %. This composite material might possess good anti-corrosion, thermal endurance and other potential properties due to its unique microstructure. The result shows that the Al90Mn9Ce1/Al2O3 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.
