CAJ | 학술논문

研究在碳纤维表面分别用化学法镀Ni和溶胶-凝胶法涂SiO_2两种涂层,用真空压力浸渗法制备C_f/Mg复合材料.用SEM、EDS和TEM对C_f/Mg复合材料微观组织和界面特征进行分析.结果表明:无涂层的碳纤维与Mg基体浸润性较差,碳纤维在C_f/Mg复合材料微观组织巾分布不均匀,界面结合强度较弱.碳纤维表面包覆Ni或SiO_2涂层改善了碳纤维与Mg基体的润湿性;包覆Ni涂层的碳纤维在Mg基体中分布均匀,并在其界面处生成金属间化合物Mg_2Ni,界面为强结合;碳纤维表面的SiO_2涂层与Mg进行少量的反应生成MgO和Si,界面结合好.能很好地传递载荷.
연구재탄섬유표면분별용화학법도Ni화용효-응효법도SiO_2량충도층,용진공압력침삼법제비C_f/Mg복합재료.용SEM、EDS화TEM대C_f/Mg복합재료미관조직화계면특정진행분석.결과표명:무도층적탄섬유여Mg기체침윤성교차,탄섬유재C_f/Mg복합재료미관조직건분포불균균,계면결합강도교약.탄섬유표면포복Ni혹SiO_2도층개선료탄섬유여Mg기체적윤습성;포복Ni도층적탄섬유재Mg기체중분포균균,병재기계면처생성금속간화합물Mg_2Ni,계면위강결합;탄섬유표면적SiO_2도층여Mg진행소량적반응생성MgO화Si,계면결합호.능흔호지전체재하.
C_f/Mg composites with three kinds of carbon fiber (without coating, coated with Ni or SiO_2) were fabricated by vacuum pressing method. The microstructure and fracture surface were characterized by SEM, EDS and TEM. The results show that the wettability between carbon fiber without coatings and Mg was low. And the wettability is enhanced by coating the carbon fiber with Ni or SiO_2. The Ni coating reacting with Mg obtains Mg_2Ni. The flat fracture of the Mg matrix composite reinforced by carbon fiber with Ni coating shows that the combination of the carbon fiber with Mg matrix is very strong. The fracture surface of the Mg matrix composite reinforced by carbon fiber with SiO_2 coating shows that the combination of the interface is optimum.