含NbSe2的铜基电接触复合材料的制备及其真空摩擦学性能研究

doi:10.15541/jim20130571

无机材料学报 ›› 2014, Vol. 29 ›› Issue (9): 936-940.DOI: 10.15541/jim20130571 CSTR: 32189.14.10.15541/jim20130571

含NbSe₂的铜基电接触复合材料的制备及其
真空摩擦学性能研究

孙建荣^{1, 2}, 李长生², 唐华², 华希俊¹

(江苏大学 1. 机械工程学院; 2. 材料科学与工程学院, 镇江 212013)

收稿日期:2013-11-04 修回日期:2014-03-13 出版日期:2014-09-17 网络出版日期:2014-08-21
基金资助:
国家自然科学基金(51105179, 51375211)

Preparation and Tribological Behavior of Cu-based Electrical Contact Composite Containing NbSe₂in Vacuum

SUN Jian-Rong^{1, 2}, LI Chang-Sheng², TANG Hua², HUA Xi-Jun¹

(1. School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China; 2. School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, China)

Received:2013-11-04 Revised:2014-03-13 Published:2014-09-17 Online:2014-08-21
Supported by:
National Natural Science Foundation of China(51105179, 51375211)

摘要/Abstract

摘要：

本研究采用粉末冶金工艺制备出含纳米NbSe₂(1wt%~9wt%)的铜-石墨自润滑复合材料。在微摩擦试验机及超低温摩擦试验机上进行摩擦磨损实验, 通过X射线衍射仪(XRD)、扫描电子显微镜(SEM )等分析其物相、形貌及磨痕, 并探讨了该复合材料在大气、真空试验条件下的磨损机理。结果表明: NbSe₂的加入显著提高铜基复合材料的摩擦学性能; 真空干摩擦条件下不含NbSe₂复合材料的摩擦系数有所增大, 但添加NbSe₂(5.5wt%)的自润滑复合材料摩擦系数更小(μ=0.185), 承载能力更高, 其磨损是粘着磨损、接触疲劳磨损共同作用的结果。

关键词: 自润滑, NbSe2, 摩擦磨损, 纳米材料, 铜-石墨

Abstract:

Cu-graphite self-lubrication composite containing nano NbSe₂ (0-9wt%) was fabricated by powder metallurgy technology. Friction property of the sample was investigated using micro-tribometer and ultra-low-temperature tribometer under atmosphere and vacuum conditions. The microstructure, phase and wear scar were also investigated by XRD and SEM. The results showed that tribological property was significantly improved after nano NbSe₂ being added to the Cu-graphite self-lubrication composite. The composite with nano NbSe₂ (5.5wt%) had smaller friction coefficient (μ=0.185) under vacuum dry friction conditions and higher carrying capacity than those of the composite without NbSe₂. It was found that the wear could be attributed to adhesive wear together with contact fatigue wear.

Key words: self-lubrication, NbSe2, friction and wear, nano material, Cu-graphite

中图分类号:

TB333

孙建荣, 李长生, 唐华, 华希俊. 含NbSe₂的铜基电接触复合材料的制备及其
真空摩擦学性能研究[J]. 无机材料学报, 2014, 29(9): 936-940.

SUN Jian-Rong, LI Chang-Sheng, TANG Hua, HUA Xi-Jun. Preparation and Tribological Behavior of Cu-based Electrical Contact Composite Containing NbSe₂in Vacuum[J]. Journal of Inorganic Materials, 2014, 29(9): 936-940.

图/表 8

表1 添加纳米NbSe2的铜-石墨复合材料配比

Table 1 The ratio of copper-graphite composite to the added nano-NbSe2

Sample	Copper/wt%	Graphite/wt%	NbSe₂/wt%
A₀	70	30.0	0
A₁	70	28.5	1.5
A₂	70	27.0	3.0
A₃	70	24.5	5.5
A₄	70	21.0	9.0

图1 二硒化铌纳米线的 XRD 图谱(a)、EDS分析(b)及SEM形貌(c)

Fig. 1 XRD pattern (a), EDS analysis (b) and TEM images of NbSe2 nanowires (c)

图2 铜-石墨-3wt%NbSe2 样品的XRD图谱

Fig. 2 XRD pattern of Cu-graphite-3wt% NbSe2

图3 样品A3网络状SEM照片

Fig. 3 SEM image of sample A3 showing net microstructure

图4 复合材料样品A0(a)、A2(b)和A3(c)的微观结构

Fig.4 Microstructures of the sintered sample A0 (a), A2 (b) and A3 (c)

图5 复合材料的动态摩擦系数测试

Fig. 5 Dynamic friction test of Cu-graphite-3wt% NbSe2

图6 复合材料的载荷-摩擦系数关系曲线

Fig. 6 Curves of the relationship between load and friction coefficient

图7 真空状态下复合材料摩擦系数变化(a)及表面磨痕SEM照片(b-d)

Fig. 7 Friction coefficient variance (a) and wear scars under vacuum condition of the composites A0 (b), A3 (c) and A4 (d)

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含NbSe₂的铜基电接触复合材料的制备及其
真空摩擦学性能研究

Preparation and Tribological Behavior of Cu-based Electrical Contact Composite Containing NbSe₂in Vacuum

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