Cho Seungchan, Kikuchi Keiko, Lee Eunkyung, Choi Moonhee, Jo Ilguk, Lee Sang-Bok, Lee Sang-Kwan, Kawasaki Akira
Composites Research Division, Korea Institute of Materials Science (KIMS), Changwon, 51508, South Korea.
Department of Materials Processing, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan.
Sci Rep. 2017 Nov 2;7(1):14943. doi: 10.1038/s41598-017-14915-7.
In order to explore the possibility of using carbon nanotube (CNT) to introduce and control the temperature coefficient of resistance (TCR) of metal matrix composite, relatively thick and short multi-walled CNTs (MWCNTs) were introduced in the metal matrix with in-situ formation of chromium carbide (CrC) at the CNT/copper (Cu) interface. We demonstrate that incompatible properties such as electrical conductivity and TCR can be achieved simultaneously by introducing MWCNTs in the Cu matrix, with control of the interfacial resistivity using the MWCNT/CrC-Cu system. High electrical conductivity of 94.66 IACS and low TCR of 1,451 10 °C are achieved in the 5 vol.% MWCNT-CuCr composite. In-situ formation of CrC nanostructures at the MWCNT/Cu interface by reaction of diffused Cr atoms and amorphous carbon of MWCNTs would assist in improving the electrical properties of the MWCNT-CuCr composites.
为了探索使用碳纳米管（CNT）引入并控制金属基复合材料电阻温度系数（TCR）的可能性，将相对粗短的多壁碳纳米管（MWCNT）引入金属基体中，并在CNT/铜（Cu）界面原位形成碳化铬（CrC）。我们证明，通过在铜基体中引入MWCNT，并利用MWCNT/CrC-Cu体系控制界面电阻率，可以同时实现诸如电导率和TCR等不相容的性能。在5体积%的MWCNT-CuCr复合材料中，实现了94.66 IACS的高电导率和1,451×10⁻⁶/°C的低TCR。通过扩散的Cr原子与MWCNT的无定形碳反应，在MWCNT/Cu界面原位形成CrC纳米结构，将有助于改善MWCNT-CuCr复合材料的电学性能。
