Superhard diamond/tungsten carbide nanocomposites

被引：24

作者：

Lin, Z. J. ^{[1
,2
]}

Zhang, J. Z. ^{[1
]}

Li, B. S. ^{[3
]}

Wang, L. P. ^{[3
,4
]}

Mao, Ho-Kwang ^{[2
]}

Hemley, Russell J. ^{[2
]}

Zhao, Yusheng ^{[1
,4
]}

机构：

[1] Los Alamos Natl Lab, LANSCE Lujan Ctr, Los Alamos, NM 87545 USA

[2] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA

[3] SUNY Stony Brook, Inst Mineral Phys, Stony Brook, NY 11794 USA

[4] Univ Nevada, Dept Phys & Astron, HiPSEC, Las Vegas, NV 89154 USA

来源：

APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 12期

关键词：

CHEMICAL-VAPOR-DEPOSITION; HIGH-PRESSURE; FRACTURE-TOUGHNESS; COMPOSITE FILMS; MECHANICAL-PROPERTIES; THERMAL-CONDUCTIVITY; SIC COMPOSITE; DIAMOND; CERAMICS; EXPANSION;

D O I：

10.1063/1.3570645

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigated the processing conditions of diamond/tungsten carbide (WC) composites using in situ synchrotron x-ray diffraction (XRD) and reactive sintering techniques at high pressure and high temperatures. The as-synthesized composites were characterized by synchrotron XRD, scanning electron microscopy, high-resolution transmission electron microscopy, and indentation hardness measurements. Through tuning of the reaction temperature and time, we produced fully reacted, well-sintered, and nanostructured diamond composites with Vickers hardness of about 55 GPa and the grain size of WC binding matrix smaller than 50 nm. A specific set of orientation relationships between WC and tungsten is identified to gain microstructural insight into the reaction mechanism between diamond and tungsten. (C) 2011 American Institute of Physics. [doi:10.1063/1.3570645]

引用

页数：3

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