| METALS AND METAL MATRIX COMPOSITES |
|
|
|
|
|
| Preparation of Nano Mo-30Cu Composite Powders by Low Temperature Self-Propagating and Reduction Method and Their Sintering Properties |
| GUO Shibo, YI Zhengyi, QUE Zhongyou, SUN Jing
|
| School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China |
|
|
|
|
Abstract Mo-Cu alloys have the advantages of high conductivity and thermal conductivity, low expansion rate, etc. They were widely used in electro-nic packaging materials, heat sink materials, integrated circuit heat-dissipation components and other fields. Using copper nitrate, ammo-nium molybdate, glucose and urea as raw material, nano Mo-30Cu composite powders were prepared by low-temperature self-propagating and reduction method. Subsequently, different copper nitrate and urea, glucose ratio precursor powder and powder after reduction were characterized by XRD and SEM. The effect of sintering process on microstructure and properties of Mo-30Cu alloy was investigated. The results showed that the best mole ratio of copper nitrate to urea and glucose is 1∶2 and 1∶0.3, respectively. Mo-30Cu composite powders were fine and uniform, and Mo and Cu phases are evenly distributed, and the average diameter of powders is about 70 nm. The best sintering process is at 1 300℃ for 2 h. The alloy had a density of 98.3%, a bending strength of 1 022 MPa, a hardness of 221HV, a electrical conductivity of 22 MS/m, a thermal conductivity of 195 W·m-1·K-1,and a thermal expansion coefficient of 10.5×10-6 K-1.The microstructure is fine and uniform, and Mo and Cu are even.The fracture morphology showed ductile fracture.
|
|
Published: 12 September 2020
|
|
|
| Fund:This work was financially supported by the National Natural Science Foundation of China (51675176), Hunan Outstanding Youth Fund (14B065) and Natural Science Foundation of Hunan (2017JJ2091). |
| About author:: Shibo Guoreceived his Ph.D. degree in materials from Beijing University of Science and Technology in June 2005. He is working as a professor in School of Mate-rials Science and Engineering, Hunan University of Science and Technology. He participates in study on preparation of advanced composites, and strength and toughening mechanism. Six national and provincial projects have been undertaken. More than 50 articles have been published at home and abroad, 6 patents for invention have been declared. |
|
|
1 Wang D Z,Li R,Duan B H. Rare Metal Materials and Engineering, 2017, 8(7),1998(in Chinese).
王德志,李然,段柏华. 稀有金属材料与工程, 2017,8(7),1998.
2 Wang D Z,Zhang Y Q,Duan B H. Nonferrous Metal Science and Engineering, 2018,9(3),15(in Chinese).
王德志,张宇晴,段柏华. 有色金属科学与工程, 2018,9(3),15.
3 Guo S B,Kang Q P. Mining Engineering, 2009, 29(4),92(in Chinese).
郭世柏, 康启平. 矿业工程, 2009, 29(4),92.
4 Wang D Z,Yin B,Sun A K,et al. Journal of Alloys and Compounds, 2016,674, 347.
5 Xin P J,Wei C C,Chun Y B,et al. International Journal of Refractory Metals and Hard Materials, 2019,81, 196.
6 Benavides P A,Soto B,Palma R H. Materials Science and Engineering: A, 2017,701,237.
7 Li B,Jin H,Fei D,et al. International Journal of Refractory Metals & Hard Materials, 2018,73,13.
8 Yao J T,Li C J,Li Y,et al. Materials & Design, 2015,88,774.
9 Wang D, Wang Y, Deng W, et al. Materials Chemistry and Physics, 2018,212,51.
10 Liu Z,Li P,Wan Q, et al. Journal of Alloys and Compounds, 2017,701,215.
11 Ying Y Z,Nian J,Xu Z,et al. Journal of Alloys and Compounds, 2018,765,396.
12 Li P,Liu Z,Cui L,et al. International Journal of Hydrogen Energy, 2014,39,10911.
13 Johnson K,John L. International Journal of Refractory Metals and Hard Materials, 2015,53,80.
14 Souli I,Terziyska V L,Zechner J,et al. Thin Solid Films, 2018,653,301.
15 Sun J, Guo S B. Journal of Materials Heat Treatment, 2016, 37(8),7(in Chinese).
孙靖,郭世柏. 材料热处理学报, 2016,37(8),7. |
|
|
|
渝公网安备50019002502923号 © Editorial Office of Materials Reports.
2020, Vol. 34 
