Thermal properties of diamond/carbon composites

被引：32

作者：

Vlasov, A

Ralchenko, V

Gordeev, S

Zakharov, D

Vlasov, I

Karabutov, A

Belobrov, P

机构：

[1] Inst Gen Phys, Moscow 117942, Russia

[2] CRIM, St Petersburg, Russia

[3] Inst Crystallog, Moscow, Russia

[4] Inst Biophys, Krasnoyarsk 660036, Russia

来源：

关键词：

diamond composites; laser flash technique; TEM; thermal conductivity;

D O I：

10.1016/S0925-9635(99)00256-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermal conductivity, k, of diamond/carbon composites with different ratios of sp(2)/sp(3)-bonded carbon is measured by the laser flash technique. The thermal conductivity of nanocomposites containing 6 nm diamond particles falls within the range of k = 0.003-0.017 W/cmK; at room temperature. The thermal conductivity increases while nanopores are gradually filled with pyrolytic carbon (pyrocarbon/diamond mass ratio variation of 0.0-0.5). Transmission electron microscopy data reveal a fairly uniform mixture of two carbon phases, the diamond and matrix having similar grain sizes. Estimates show that the phonon free path is limited by dimensions of carbon matrix layer. Thermal data for coarse-grain (1-2 mu m) composites are also given for comparison. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：1104 / 1109

页数：6

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