Study on in-situ synthesis of carbon nano morphologies by Fe/Y catalyst on copper

• 1、Materials Science and Engineering School,Tianjin University
• 2、Materials Science and Engineering School, Tianjin University

Abstract：Because of its excellent electro and thermal conductivity, high strength and elevated temperature stability, as well as low thermal expansion, copper matrix composite have important applications in mechanical, electronic, and aerospace fields. Conducting study on the development of new reinforcement and preparation method of copper matrix composite can better the technical problems of poor interface and uneven mixing between reinforcement and copper substrate, which has important theoretical significance and practical value in improving physical and mechanical properties of composites. In this paper, study on in situ synthesis condition of carbon nano morphologies by Fe/Y catalyst was made by optimizing weight ratio of Fe to Y and CVD temperature. The stabilization mechanism of Y on catalyst was discussed. It was discovered that carbon nanotubes (CNTs) and carbon nanoonions (CNOs) with relatively high yield and good morphology could be acquired at 650℃ when Fe: Y: Cu= 16: 4: 80 (wt.%) in composite powder. The solid solution of Y in Fe lattice made Fe and Cu difficult to diffuse together, thus keep Fe catalyst active.

Keywords： carbon nano morphology chemical vapor deposition catalyst