CAJ | 학술논문

在温度低至360℃,初始压力低至1 MPa的条件下发泡制得沥青泡沫,并不经过预氧化而直接碳化制备孔径均匀的泡沫碳,泡沫碳的平均孔径为300~700μm.并且对比了省略预氧化步骤和保留预氧化步骤制备的泡沫碳的结构和性能.通过数码照片和扫描电镜观察,省略预氧化步骤制得的泡沫碳的泡孔形状并没有发生变化,只是微裂纹较多.通过对比抗压强度发现,省略预氧化步骤制得的泡沫碳比保留预氧化步骤制得的泡沫碳低12%左右.由于制备简单,并且孔径较大,本工艺制备的泡沫碳适于用作复合材料的基体.
재온도저지360℃,초시압력저지1 MPa적조건하발포제득력청포말,병불경과예양화이직접탄화제비공경균균적포말탄,포말탄적평균공경위300~700μm.병차대비료성략예양화보취화보류예양화보취제비적포말탄적결구화성능.통과수마조편화소묘전경관찰,성략예양화보취제득적포말탄적포공형상병몰유발생변화,지시미렬문교다.통과대비항압강도발현,성략예양화보취제득적포말탄비보류예양화보취제득적포말탄저12%좌우.유우제비간단,병차공경교대,본공예제비적포말탄괄우용작복합재료적기체.
The pitch foam was prepared at temperature of 360 ℃ and pressure of 1 MPa, then it was carbonized to obtain the carbon foam. Average pore diameter of the prepared carbon foam ranges 300~700 μm. Structures and properties of carbon foams prepared via pre-oxidation (CF-y) or no pre-oxidation (CF-n) were contrasted. The digital photo and scanning electron microscope were used to observe their pore structures. It’s found that the pore structure of CF-n had no deformation, but more micro cracks than CF-y. The comparison of compression strength indicated that the compression strength of CF-n was lower than CF-y by 12%. CF is extremely useful for matrix of composite because of its simple fabrication process and big pore diameter.