Consolidation of dispersion strengthened copper–niobium carbide composite prepared by in situ and ex situ methods
Consolidation of dispersion strengthened copper–niobium carbide composite prepared by in situ and ex situ methods
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DOI：
10.1016/j.msea.2008.10.038
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发表时间：
2009-04
期刊：
影响因子：
6.4
通讯作者：
H. Zuhailawati;T. L. Yong
中科院分区：
文献类型：
--
作者：
H. Zuhailawati;T. L. Yong
本文采用原位和异位加工方法制备了Cu-20vol%NbC复合材料。在原位法中，Cu-Nb-C 的混合物在高能行星磨机中机械合金化，而在非原位法中，Cu-NbC 粉末的混合物在低能球磨机中混合。通过在不同的压制压力（即350-650MPa范围内）下压制粉末，然后在900°C下烧结一小时，系统地研究了复合粉末的固结。 X 射线衍射和能量色散 X 射线分析证实了 Cu-Nb-C 烧结样品的铜基体中存在 NbC 颗粒。由于细 NbC 颗粒的均匀分布和良好的 NbC-Cu 粘合，原位复合材料比同类材料具有更高的硬度和导电率。较高的压实压力增加了复合材料的硬度、导电性和密度。
In this paper, Cu–20vol%NbC composite was prepared by in situ and ex situ processing methods. In in situ method, a mixture of Cu–Nb–C was mechanically alloyed in a high energy planetary mill while in ex situ method, a mixture of Cu–NbC powder was mixed in a low energy ball mill. Consolidation of the composite powder was systematically studied by pressing the powder at different compaction pressures, i.e. in the range of 350–650MPa, followed with sintering at 900°C for an hour. The presence of the NbC particle in copper matrix of the Cu–Nb–C sintered sample has been confirmed by X-ray diffraction and energy dispersive X-ray analysis. In situ composite has higher hardness and electrical conductivity than its counterpart due to a homogenous distribution of fine NbC particle and good NbC–Cu adhesion bonding. Higher compaction pressure has increased the hardness, electrical conductivity and density of the composites.