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含钼酸银镍基复合镀层的制备及其高温摩擦学性能

时间:2019-03-30 14:41来源:毕业论文
复合镀层中确实存在钼酸银。适度的钼酸银对材料的润滑有很大的提高。钼酸银的添加使得复合镀层的硬度提高以及摩擦系数降低;但是过量的钼酸银不利于复合镀层的制备,也会对力

摘要论文通过沉淀法制备钼酸银,采用了脉冲电沉积方法制备钼酸银镍基复合镀层,同时研究镀液中钼酸银的浓度对复合镀层的力学性能与高温摩擦学性能的影响。经过XRD,EDS,DSC,Raman等技术分析后发现:钼酸银在高温状态下润滑性能良好,当该复合氧化物在500℃左右会分解,影响其润滑性能。33990
通过实验发现,复合镀层中确实存在钼酸银。适度的钼酸银对材料的润滑有很大的提高。钼酸银的添加使得复合镀层的硬度提高以及摩擦系数降低;但是过量的钼酸银不利于复合镀层的制备,也会对力学性能和摩擦性能有不好的影响。
关键词 : 钼酸银  镍基复合镀层   脉冲电沉积法   摩擦磨损性能
毕业设计说明书(毕业论文外文摘要
Title  Research on silver molybdate’s Influence on high temperature Tribological Performance of Nickel-based Composite Coatings                                     
Abstract
In this paper , the precipitation method was used to prepare the silver molybdate and pulse electrodeposition method was used to prepare the silver molybdate /nickel based composite coatings. Furthermore, the influence of silver molybdate concentration on mechanical properties and high temperature friction performance was discussed. By XRD, EDS,DSC, Raman spectra, it was found that: silver molybdate have good lubricating properties at a high temperature, but the composite oxide will occurs decomposition at about 500℃,thus it affects the lubricating effect. 源`自*六)维[论*文'网www.lwfree.cn
 The silver molybdate /nickel based composite coatings could be prepared successfully by the pulse electrodeposition process. Moderate silver molybdate indeed play a role. With the increase of silver-containing composite oxide addition, the hardness and lubricity of composite coatings were also improved. When the amount of silver molybdate was superfluous, it was detrimental to the preparation of composite coatings ,the mechanical property and tribological performance.
Keywords : silver molybdate       nickel based composite coatings       pulse electrodeposition process       friction and wear performance
 目次
1  引言    1
1.1镍基纳米复合镀层的研究进展    1
1.1.1抗高温氧化    1
1.1.2自润滑    2
1.1.3其他功能    2
1.2  复合镀层概述    2
1.2.1 复合镀层    2
1.2.2 复合镀层的分类    2
1.2.3 复合电镀的机理    3
1.3  复合镀层电沉积法概述    3
1.4  研究目的和研究内容    4
2  实验条件和方法    5
2.1  复合镀层制备    5
2.1.1主要试验流程    5
2.1.2基体材料及尺寸    5
2.1.3镀层基质金属的选择    5
2.2  实验材料和实验仪器    6
2.2.1制备镀层主要药品    6
2.2.2镀层制备的主要仪器设备    6
2.3  制备样品    7
2.3.1  化学法制备钼酸银    7
2.3.2  双脉冲电沉积法制备复合镀层    7 源`自*六)维[论*文'网www.lwfree.cn
2.4  钼酸银/Ni复合镀层的高温摩擦磨损测试    10
2.4.1实验仪器及步骤    10
2.4.2磨痕表面形貌    11
2.5  钼酸银及其中间产物的表征    11 含钼酸银镍基复合镀层的制备及其高温摩擦学性能:http://www.lwfree.cn/cailiao/20190330/31339.html
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