期刊
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
卷 34, 期 4, 页码 876-882出版社
WUHAN UNIV TECHNOLOGY
DOI: 10.1007/s11595-019-2131-x
关键词
Cu; Ti3AlC2; functional gradient material; electrical conductivity; thermal conductivity
资金
- National Natural Science Foundation of China [51402097]
- Open Foundation of Hubei Provincial Key Laboratory of Green Materials for Light Industry [201806A04]
- College Students Innovation and Entrepreneurship Training Program of Hubei University of Technology [201810500151]
Cu/Ti3AlC2 composite and functional-gradient materials with excellent electrical conductivity and thermal conductivity as well as good flexural properties were prepared by low-temperature spark plasma sintering of Cu and Ti3AlC2 powder mixtures. The phase compositions of the materials were analyzed by X-ray diffraction, and their microstructure was characterized by scanning electron microscopy and energy dispersive X-ray spectroscopy. Further, the electrical conductivity, thermal conductivity, and flexural properties of the materials were tested. Results show that, for the composite materials, the resistivity rises from 0.75 x 10(-7) omega center dot m only to 1.32 x 10(-7) omega center dot m and the thermal diffusivity reduces from 82.5 mm(2)/s simply to 39.8 mm(2)/s, while the flexural strength improves from 412.9 MPa to 471.3 MPa, as the content of Ti3AlC2 is increased from 5wt% to 25wt%. Additionally, the functional-gradient materials sintered without interface between the layers exhibit good designability, and their overall electrical conductivity, thermal conductivity, and flexural strength are all higher than those of the corresponding uniform composite material.
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