论文部分内容阅读
采用低温固相烧结工艺LTSS制备一种高比表面积金属纤维多孔材料。首先,采用化学镀铜工艺在切削加工的不锈钢纤维表面镀覆一层具有粗糙表面形貌的铜,然后将该镀铜纤维在氢气保护氛围下于800°C保温1h完成低温固相烧结成形。结果表明,采用该工艺可以获得一种具有复杂表面形貌以及高比表面积(>0.2m2/g)的新型金属纤维多孔材料(SMFM)。利用SEM及BET表征手段研究LTSS工艺中烧结温度对烧结样本表面形貌以及比表面积的影响规律,发现烧结过程中对纤维表面微结构的破坏是造成SMFM比表面积损失的重要原因。实验得出理想的烧结温度为800°C。
Low temperature solid state sintering process LTSS was used to prepare a high specific surface area metal fiber porous material. First of all, the surface of stainless steel fibers machined by electroless copper plating is coated with a layer of copper with a rough surface morphology, and then the copper-clad fibers are annealed at 800 ° C. for 1 hour in a hydrogen atmosphere to complete low temperature solid phase sintering. The results show that a new type of metal fiber porous material (SMFM) with complex surface morphology and high specific surface area (> 0.2m2 / g) can be obtained by this process. The effects of sintering temperature on the surface morphology and specific surface area of sintered samples were studied by means of SEM and BET. It was found that the destruction of the microstructure of the fibers during sintering was the main reason for the specific surface area loss of SMFM. Experiments show that the ideal sintering temperature is 800 ° C.