| Title |
Microstructural Changes on Heat Treatment of Cu-15wt%Nb Filamentary Nanocomposite |
| Authors |
문정호(Jeong Ho Moon); 조종우(Jong Woo Cho); 이갑호(Kap Ho Lee); 홍순익(Sun Ig Hong) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Cu-Nb filamentary nanocomposite; Transmission electron microscopy; Multi-twin structure; Spherical Nb particles; Amorphous layers |
| Abstract |
The microstructural changes under varying temperature conditions of Cu-15 wt%Nb filamentary nanocomposite fabricated by the bundling and drawing process were characterized using transmission electron microscopy(TEIVI). In the sample heat treated at 400℃, twin bands were observed in a subelemental wire with the Nb filaments acting as barriers to twin propagation, and the multi-twins having {111} twin planes were observed in Cu sheath. The spheroidzation of Nb filaments appears in specimen heat treated at 500℃. Nb filaments completely transformed into spherical particles in the sample heat treated 700℃, and the amorphous layers with 4 nm in width were observed at the interface of Nb particles and the Cu matrix. The texture of the Cu matrix(<100> and <111>) and Nb particles(<110>) remains unchanged following annealing at 700℃. (Received March 12, 2004) |