CAJ | 학술논문

在元素粉末反应制备多孔材料中，原料粉末粒度是影响其多孔结构的主要因素之一。本文通过元素粉末反应合成的方法制备Cu-Al多孔材料，研究原料粉末的粒径对Cu-Al多孔材料孔径、孔隙度、透气度和体积膨胀率等参数的影响。结果表明：Al 粉粒径是影响 Cu-Al 多孔材料最大孔径的主要因素，材料的最大孔径 dm与 Al粉粒径dp之间严格遵循dm=0.48dp的线性变化规律；Cu粉粒径则对Cu-Al多孔材料最大孔径影响较小。当粉末粒径在48.5μm以上时，粉末粒径的改变对Cu-Al多孔材料的开孔隙度和总孔隙度影响不大。在实验研究范围内， Cu-Al 多孔材料的体积膨胀率随粉末粒径的增大而增大；当粉末粒径很小时，Cu-Al 多孔材料存在体积收缩的趋势。
재원소분말반응제비다공재료중，원료분말립도시영향기다공결구적주요인소지일。본문통과원소분말반응합성적방법제비Cu-Al다공재료，연구원료분말적립경대Cu-Al다공재료공경、공극도、투기도화체적팽창솔등삼수적영향。결과표명：Al 분립경시영향 Cu-Al 다공재료최대공경적주요인소，재료적최대공경 dm여 Al분립경dp지간엄격준순dm=0.48dp적선성변화규률；Cu분립경칙대Cu-Al다공재료최대공경영향교소。당분말립경재48.5μm이상시，분말립경적개변대Cu-Al다공재료적개공극도화총공극도영향불대。재실험연구범위내， Cu-Al 다공재료적체적팽창솔수분말립경적증대이증대；당분말립경흔소시，Cu-Al 다공재료존재체적수축적추세。
Powder size is one of the main factors affecting the pore structure of Cu-Al porous material. A reactive synthesis method was used to fabricate Cu-Al porous material in the present paper. The effect of powder size on the pore size,porosity,gas permeability and volume expansion ratio of the porous Cu-Al alloy was investigated in details. The results show that the Al powder size is one of main factors determining the maximum pore size of Cu-Al porous material. The maximumpore sizedm and Al powder sizedp were investigated to obey the equationdm=0.48dp. However,there is little effect of Cu powder size on the maximum pore size of porous Cu-Al alloy. When the powder size is greater than 48.5μm,the open porosity and overall porosity have no obvious changes with increasing the powder size; the volume expansion ratio of porous Cu-Al increases with the increment of powder size. The Cu-Al sintering compact has a tendency of volume shrinkage when the fine powder is used.