Production of copper-niobium carbide nanocomposite powders via mechanical alloying

被引:43
|
作者
Marques, MT
Livramento, V
Correia, JB
Almeida, A
Vilar, R
机构
[1] INETI, DMTP, P-1649038 Lisbon, Portugal
[2] IST, Dept Mat Engn, P-1049001 Lisbon, Portugal
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 399卷 / 1-2期
关键词
mechanical alloying; nanostructured copper; NbC; composite materials;
D O I
10.1016/j.msea.2005.03.090
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Nanocrystalline niobium carbide was synthesed in situ in a copper matrix during high-energy milling of elemental powders. Three Powder batches were produced with nominal compositions of 5.10 and 20 vol.% NbC Characterisation by X-ray diffraction and scanning electron microscopy indicates that early during the milling process a carbide dispersion is formed within a nanostructured copper matrix, After annealing at 873 K, the carbide structure and particle size are maintained, reflecting the ability of the microstructure to resist to coarsening. The hardness levels attained are more than twice those of nanostructured copper. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:382 / 386
页数:5
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