期刊
JOURNAL OF NUCLEAR MATERIALS
卷 431, 期 1-3, 页码 196-201出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnucmat.2011.11.013
关键词
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资金
- Chinese Academy of Sciences [KJCX2-YW-N35, XDA03010303]
- National Magnetic Confinement Fusion Program [2009GB106005, 2011GB108004]
- National Natural Science Foundation of China [11075177, 91026002, 91126002, 11175203, 51101152]
Fabricating W/Cu functionally graded materials (FGM) with fine microstructure and good properties is extremely significant in the development of fusion reactors as well as spallation neutron sources. The five-layered W/Cu FGM (W30% + Cu70%/W50% + Cu50%/W70% + Cu30%/W90% + Cu10%/W100%, volume fraction) were fabricated by a microwave sintering method in a short time (30 min). Scanning electron microscopy and energy dispersive X-ray spectrometer analysis showed that the graded structure can be retained although the microwave sintering temperature was as high as 1300 degrees C (well above the melting temperature of Cu) and the fine microstructure of W in each layer can be also maintained due to the short sintering time. The overall relative density of the W/Cu FGM sample microwave-sintered at 1350 degrees C reaches 93% and the copper-rich layers are almost 100% dense. The thermal conductivity of the sample is about 200 W/mK at room temperature and decreases with increasing temperature. (C) 2011 Elsevier B.V. All rights reserved.
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