VN-Ag-MoO<sub>3</sub>复合材料的制备及宽温域摩擦学行为

王丽萍; 陈树; 刘二勇; 杜双明; 杜慧玲; 蔡辉

doi:10.13801/j.cnki.fhclxb.20210208.001

VN-Ag-MoO₃复合材料的制备及宽温域摩擦学行为

doi: 10.13801/j.cnki.fhclxb.20210208.001

王丽萍^1,,
陈树^{1, 2,},
刘二勇^1, ,,
杜双明^1,,
杜慧玲^1,,
蔡辉^1,

1.
西安科技大学　材料科学与工程学院，西安 710054
2.
西安航空制动科技有限公司，兴平 713100

基金项目: 国家自然科学基金 (51705415)；中科院海洋新材料与应用技术重点实验室开放课题(2018K01)；陕西省重点研发计划项目(2020GY-115)

详细信息

通讯作者:
刘二勇，博士，副教授，硕士生导师，研究方向为固体润滑材料　 E-mail：liueryong@xust.edu.cn

中图分类号: TB333
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- 被引次数: 0
出版历程
- 收稿日期: 2020-12-17
- 录用日期: 2021-01-27
- 网络出版日期: 2021-02-08
- 刊出日期: 2021-12-01

Preparation and wide temperature range tribological behavior of VN-Ag-MoO₃ composites

WANG Liping^1
,,
CHEN Shu^{1, 2
,},
LIU Eryong^{1
, ,},
DU Shuangming^1
,,
DU Huiling^1
,,
CAI Hui^1
,

1.
School of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
2.
Xi’an Aviation Brake Technology CO. LTD., Xingping 713100, China

摘要

摘要: 利用真空热压烧结技术制备了VN-Ag-MoO₃复合材料，研究了Ag₂MoO₄对VN基复合材料组织结构及宽温域摩擦磨损性能的影响。结果表明：VN-Ag-MoO₃复合材料组织较致密，主要由VN、MoO₃和Ag组成，其中均匀分布于VN基体的MoO₃和Ag由Ag₂MoO₄经高温分解形成。宽温域摩擦磨损测试表明，Ag₂MoO₄的添加有效改善了室温(RT)~700℃温域范围VN陶瓷的摩擦磨损性能。其中，700℃时Ag₂MoO₄含量为10wt%的VN-10Ag-MoO₃的摩擦系数(0.285)和磨损率(1.37×10⁻⁵ mm³/(N·m))分别较VN降低了23%和72%，这归因于磨损表面的氧化钒、钒酸银和钼酸银等高温润滑相起到了优异的润滑及减磨作用。
- 非金属基复合材料 /
- 氧化物 /
- 真空烧结 /
- 宽温域摩擦磨损性能 /
- 摩擦学
Abstract: VN-Ag-MoO₃ composites were prepared by vacuum hot pressing sintering. The effects of Ag₂MoO₄ on the microstructure and wide temperature range friction and wear properties of VN matrix composites were investigated. The results show that the structure of VN-Ag-MoO₃ composite is relatively compact, mainly composed of VN, MoO₃ and Ag, and the MoO₃ and Ag distributed evenly in VN matrix are formed by the decomposition of Ag₂MoO₄ at high temperature. Friction and wear tests in a wide temperature range show that the addition of Ag₂MoO₄ can effectively improve the friction and wear properties of VN ceramics in the temperature range of room temperature (RT)-700℃. The friction coefficient (0.285) and wear rate (1.37×10⁻⁵ mm³/(N·m)) of VN-10Ag-MoO₃ with 10wt% Ag₂MoO₄ at 700℃ are 23% and 72% lower than those of VN, respectively, which are attributed to the excellent lubrication and wear reduction effects of high temperature lubrication phases such as vanadium oxide, silver vanadate and silver molybdate on the wear surface.
- nonmetallic matrix composites /
- oxide /
- vacuum sintering /
- wide temperature range tribological behavior /
- tribology

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图 1 VN-Ag-MoO₃复合材料的XRD图谱

Figure 1. XRD patterns of VN-Ag-MoO₃ composites

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图 2 VN-Ag-MoO₃复合材料的SEM图像

Figure 2. SEM images of VN-Ag-MoO₃ composites((a) VN-5Ag-MoO₃; (b) VN-10Ag-MoO₃; (c) VN-15Ag-MoO₃)

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图 3 VN-Ag-MoO₄复合材料的元素面分布

Figure 3. Element distribution of VN-Ag-MoO₄ composite

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图 4 不同温度时VN-Ag-MoO₃复合材料的摩擦系数 (a) 及磨损率 (b)

Figure 4. Friction coefficient (a) and wear rate (b) of VN-Ag-MoO₃ composites at different temperatures

RT—Room temperature

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图 5 不同温度时VN-Ag-MoO₃复合材料的磨损形貌

Figure 5. SEM morphologies of worn surfaces of VN-Ag-MoO₃ composites at different temperatures ((a) VN- 5Ag-MoO₃, RT; (b) VN-10Ag-MoO₃, RT; (c) VN-15Ag-MoO₃, RT; (d) VN-5Ag-MoO₃, 300℃; (e) VN-10Ag-MoO₃, 300℃; (f) VN-15Ag-MoO₃, 300℃; (g) VN-5Ag-MoO₃, 500℃; (h) VN-10Ag-MoO₃, 500℃; (i) VN-15Ag-MoO₃, 500℃; (j) VN-5Ag-MoO₃, 700℃; (k) VN-10Ag-MoO₃, 700℃; (l) VN-15Ag-MoO₃, 700℃)

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图 6 不同温度时VN-Ag-MoO₃复合材料的磨痕三维轮廓图

Figure 6. Three-dimensional wear profiles of worn surfaces of VN-Ag-MoO₃ composites at different temperatures((a) VN- 5Ag-MoO₃, RT; (b) VN-10Ag-MoO₃, RT; (c) VN-15Ag-MoO₃, RT; (d) VN-5Ag-MoO₃, 300℃; (e) VN-10Ag-MoO₃, 300℃; (f) VN-15Ag-MoO₃, 300℃; (g) VN-5Ag-MoO₃, 500℃; (h) VN-10Ag-MoO₃, 500℃; (i) VN-15Ag-MoO₃, 500℃; (j) VN-5Ag-MoO₃, 700℃; (k) VN-10Ag-MoO₃, 700℃; (l) VN-15Ag-MoO₃, 700℃)

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图 7 不同温度时VN-15Ag-MoO₃复合材料磨痕表面的元素含量 (a) 和化学组成 (b)

Figure 7. Element content (a) and chemical composition (b) of worn surfaces of VN-15Ag-MoO₃ composite at different temperatures

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表 1 VN-Ag-MoO₃复合材料的命名

Table 1. Naming of VN-Ag-MoO₃ composites

Sample	Ag₂MoO₄/wt%
VN	0
VN-5Ag-MoO₃	5
VN-10Ag-MoO₃	10
VN-15Ag-MoO₃	15

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表 2 各元素在VN-Ag-MoO₃系复合材料中的含量

Table 2. Element content of VN-Ag-MoO₃ composites wt%

Sample	Chemical composition
Sample	V	N	Ag	Mo	O
VN	77.45	16.50	−	−	4.41
VN-5Ag-MoO₃	78.08	12.60	3.32	1.58	3.75
VN-10Ag-MoO₃	76.15	10.35	5.54	2.48	4.82
VN-15Ag-MoO₃	73.75	9.26	7.09	2.75	6.32

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表 3 VN-Ag-MoO₃系复合材料的硬度及密度

Table 3. Hardness and density of VN-Ag-MoO₃ composites

Composition	Hardness/HV	Density/(g·cm⁻³)
VN-5Ag-MoO₄	1189.45	5.81
VN-10Ag-MoO₄	1226.50	5.92
VN-15Ag-MoO₄	1170.40	6.10

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