基于正交设计的纳米蛇纹石-纳米氧化镧/聚四氟乙烯复合材料在沙尘环境下的摩擦学性能

闫艳红; 王腾彬; 吴子健; 卢欢; 贾志宁

doi:10.13801/j.cnki.fhclxb.20191024.001

基于正交设计的纳米蛇纹石-纳米氧化镧/聚四氟乙烯复合材料在沙尘环境下的摩擦学性能

doi: 10.13801/j.cnki.fhclxb.20191024.001

闫艳红^1,,
王腾彬^1,,
吴子健^1,,
卢欢^1,,
贾志宁^2, ,

1.
燕山大学　机械工程学院，秦皇岛 066004
2.
承德石油高等专科学校　河北省仪器仪表工程技术研究中心，承德 067000

基金项目: 河北省自然基金(E2016411005)

详细信息

通讯作者:
贾志宁，博士，教授，研究方向为材料摩擦学设计及摩擦学性能、仪器仪表开发　E-mail：ysujia@163.com

中图分类号: TB430.1060
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- 被引次数: 0
出版历程
- 收稿日期: 2019-08-27
- 录用日期: 2019-10-10
- 网络出版日期: 2019-10-24
- 刊出日期: 2020-07-15

Tribological properties of nano Serpentine-nano La₂O₃/polytetrafluoroethylene composites based on orthogonal design in sand-dust environment

YAN Yanhong^1
,,
WANG Tengbin^1
,,
WU Zijian^1
,,
LU Huan^1
,,
JIA Zhining^{2
, ,}

1.
School of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China
2.
Hebei Instrument & Meter Engineering Technology Research Center, Chengde Petroleum College, Chengde 067000, China

摘要

摘要: 以聚四氟乙烯(PTFE)为基体，采用正交实验法研究了纳米蛇纹石(nano Serpentine)、纳米氧化镧 (nano La₂O₃)和环境三种因素对nano Serpentine-nano La₂O₃/PTFE复合材料摩擦学性能的影响。采用自制沙尘模拟装置改进现有的 MMU-5G摩擦磨损试验机对nano Serpentine-nano La₂O₃/PTFE复合材料进行摩擦学实验。通过SEM观察试样磨损表面和转移膜形貌，分析nano Serpentine-nano La₂O₃/PTFE复合材料磨损机制。结果表明：环境因素对nano Serpentine-nano La₂O₃/PTFE复合材料的摩擦系数影响最大，干摩擦摩擦系数比沙尘环境下摩擦系数低；nano Serpentine含量对nano Serpentine-nano La₂O₃/PTFE复合材料的磨损率影响最大，当nano Serpentine质量分数为9wt%时，nano Serpentine-nano La₂O₃/PTFE复合材料的总体磨损率最低。nano Serpentine-nano La₂O₃/PTFE复合材料的干摩擦的磨损机制主要为黏着磨损，沙尘环境的磨损机制主要为磨粒磨损。
- 聚四氟乙烯(PTFE) /
- 复合材料 /
- 正交实验 /
- 沙尘环境 /
- 摩擦学性能
Abstract: The effects of nano Serpentine, nano La₂O₃ and environmental factors on the tribological properties of nano Serpentine-nano La₂O₃/polytetrafluoroethylene(PTFE) composites were investigated by orthogonal test. The self-made sand-dust environment simulation device was used to improve the existing MMU-5G friction and wear tester, and the tribological experiment was carried out using the test machine. The wear surface and transfer film morphology of the nano Serpentine-nano La₂O₃/PTFE composites were observed by SEM and the wear mechanism was analyzed. The results show that the friction coefficient of nano Serpentine-nano La₂O₃/PTFE composites is greatly influenced by the environmental factors and the friction coefficient of dry friction is lower than that in sand-dust environment. The nano Serpentine content has the greatest influence on the wear rate of nano Serpentine-nano La₂O₃/PTFE composites. When the nano Serpentine mass fraction is 9wt%, the wear rate of nano Serpentine-nano La₂O₃/PTFE composites is the lowest. The wear mechanism of dry friction is mainly adhesive wear, and the wear mechanism in sand-dust environment is mainly abrasive wear.
- polytetrafluoroethylene(PTFE) /
- composite /
- orthogonal experiment /
- sand-dust environment /
- tribological properties

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图 1 Nano Serpentine-nano La₂O₃/PTFE复合材料制备流程

Figure 1. Preparation flow chart of nano Serpentine-nano La₂O₃/PTFE composites

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图 2 MMU-5型摩擦磨损试验机示意图

Figure 2. Schematic diagram of MMU-5G friction and wear testing machine

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图 3 Nano Serpentine-nano La₂O₃/PTFE复合材料的硬度

Figure 3. Hardness of nano Serpentine-nano La₂O₃/PTFE composites

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图 4 Nano Serpentine-nano La₂O₃/PTFE复合材料的弹性模量

Figure 4. Elastic modulus of nano Serpentine-nano La₂O₃/PTFE composites

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图 5 Nano Serpentine-nano La₂O₃/PTFE复合材料的摩擦系数

Figure 5. Friction coefficients of nano Serpentine-nano La₂O₃/PTFE composites

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图 6 Nano Serpentine-nano La₂O₃/PTFE复合材料的磨损率

Figure 6. Wear rates of nano Serpentine-nano La₂O₃/PTFE composites

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图 7 沙尘环境下nano Serpentine-nano La₂O₃/PTFE复合材料磨损率随nano Serpentine质量分数的变化曲线

Figure 7. Curves of nano Serpentine-nano La₂O₃/PTFE composites wear rate with nano Serpentine mass fraction in sand-dust environment

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图 8 Nano Serpentine-nano La₂O₃/PTFE复合材料断面的EDS图像

Figure 8. EDS images of cross-section of nano Serpentine-nano La₂O₃/PTFE composites

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图 9 干摩擦环境下nano Serpentine-nano La₂O₃/PTFE复合材料表面的SEM图像

Figure 9. SEM images of surfaces of nano Serpentine-nano La₂O₃/PTFE composites in dry friction environment

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图 10 扬沙环境下nano Serpentine-nano La₂O₃/PTFE复合材料表面的SEM图像

Figure 10. SEM images of surfaces of nano Serpentine-nano La₂O₃/PTFE composite in sand blowing environment

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图 11 弱沙尘暴下nano Serpentine-nano La₂O₃/PTFE复合材料表面的SEM图像

Figure 11. SEM images of surfaces of nano serpentine-nano La₂O₃/PTFE composites under weak dust storm

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图 12 中等强度沙尘暴下nano Serpentine-nano La₂O₃/PTFE复合材料表面的SEM图像

Figure 12. SEM images of surfaces of nano serpentine-nano La₂O₃/PTFE composites under medium-intensity sandstorm

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图 13 不同水平nano Serpentine-nano La₂O₃/PTFE复合材料的配偶件表面的SEM图像

Figure 13. SEM images of surfaces of coupled parts of nano Serpentine-nano La₂O₃/PTFE composites at different levels

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图 14 不同水平nano Serpentine-nano La₂O₃/PTFE复合材料对偶件的EDS图谱

Figure 14. EDS spectra of coupled parts of nano Serpentine-nano La₂O₃/PTFE composites at different levels

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表 1 纳米蛇纹石-纳米La₂O₃/聚四氟乙烯(nano Serpentine-nano La₂O₃/PTFE)复合材料在沙尘环境下的摩擦正交实验

Table 1. Friction orthogonal experiment of nano Serpentine-nano La₂O₃/polytetrafluoroethylene (PTFE) composites in sand-dust environment

Specimen number	Mass fraction of nano Serpentine/wt%	Mass fraction of nano La₂O₃/wt%	Environment
1	3	2	Dry friction
2	3	4	Sand blowing
3	3	6	Weak sandstorm
4	3	8	Medium-intensity sandstorm
5	6	2	Sand blowing
6	6	4	Dry friction
7	6	6	Medium-intensity sandstorm
8	6	8	Weak sandstorm
9	9	2	Weak sandstorm
10	9	4	Medium-intensity sandstorm
11	9	6	Dry friction
12	9	8	Sand blowing
13	12	2	Medium-intensity sandstorm
14	12	4	Weak sandstorm
15	12	6	Sand blowing
16	12	8	Dry friction

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表 2 各水平对nano Serpentine-nano La₂O₃/PTFE复合材料在沙尘环境下摩擦系数的影响

Table 2. Influence of each level on friction coefficient of nano Serpentine-nano La₂O₃/PTFE composites in sand-dust environment

Serial number	Nano Serpentine friction coefficient	Nano La₂O₃ friction coefficient	Environment friction coefficient
K1	0.669	0.739	0.555
K2	0.772	0.731	0.748
K3	0.679	0.714	0.823
K4	0.771	0.707	0.766
Note: K represents the sum of experimental results corresponding to any level sign i (i =1, 2, 3, 4).

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表 3 各因素对nano Serpentine-nano La₂O₃/PTFE复合材料在沙尘环境下摩擦系数的影响

Table 3. Influence of various factors on friction coefficient of nano Serpentine-nano La₂O₃/PTFE composites in sand-dust environment

Source of variance	Sum of squared deviation	Degree of freedom	Variance estimation	F	F_α	Significant
Nano Serpentine	0.002380450	3	0.000793483	0.992231227	F_0.1(3,6) = 3.460	2
Nano La₂O₃	0.000168630	3	0.000056210	0.070289201	F_0.95(3,6) = 0.112	1
Environment	0.010189901	3	0.003396634	4.247406314	F_0.975(3,6) = 0.068	3
Experimental error	0.004798176	6	0.000799696
Total variance	0.017537156	15
Notes: F—Statistical value of F test; $ {F}_{\alpha } $—Critical value of F test.

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表 4 各水平对nano Serpentine-nano La₂O₃/PTFE复合材料在沙尘环境下磨损率的影响

Table 4. Influence of each level on wear rate of nano Serpentine-nano La₂O₃/PTFE composites in sand-dust environment

10⁻⁵ mm³(N·m)⁻¹
Serial number	Nano Serpentine wear rate	Nano La₂O₃ wear rate	Environment wear rate
K1	17.589	13.152	11.022
K2	9.886	10.460	9.664
K3	9.871	11.501	12.294
K4	9.989	12.223	14.355

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表 5 各因素对nano Serpentine-nano La₂O₃/PTFE复合材料在沙尘环境下磨损率的影响

Table 5. Influence of various factors on wear rate of nano Serpentine-nano La₂O₃/PTFE composites in sand-dust environment

Source of variance	Sum of squared deviation	Degree of freedom	Variance estimation	F	F_α	Significant
Nano Serpentine	11.044695180	3	3.68156506	8.766155311	F_0.025(3,6) = 6.60	2
Nano La₂O₃	0.971700311	3	0.323900104	0.771236843	F_0.95(3,6) = 0.1112	1
Environment	2.982936867	3	0.994312289	2.367551792		1
Experimental error	2.519849304	6	0.419974884
Total variance	17.519181660	15

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