CN115093767A - 一种温度自适应超滑的固体润滑涂层制备方法 - Google Patents
一种温度自适应超滑的固体润滑涂层制备方法 Download PDFInfo
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Abstract
一种温度自适应超滑的固体润滑涂层制备方法,属于固体涂层润滑领域。称取一定质量的粘结剂,将其于某种有机溶剂混合,设定搅拌速度、搅拌时间和搅拌温度进行磁力搅拌,使粘结剂完全溶解于有机溶剂;称取一定质量的硅酸盐类材料,将其加入有机溶剂,设定搅拌速度和时间,使固体颗粒均匀分散于溶剂中;使用喷涂法将以上分散液喷涂于喷砂处理的金属基体表面;喷涂完成后,将金属材料置于烘干箱中,设定烘干温度和时间,使得固体润滑涂层充分固化,得到温度自适应超滑的固体润滑涂层。本发明简单可行,可操作性强,通过选取不同的硅酸盐类型,可以控制固体润滑涂层在大气、干燥或潮湿环境中的高温超低摩擦,极大程度减缓基体材料的磨损。
Description
技术领域
本发明涉及一种温度自适应超滑的固体润滑涂层制备方法的方法,属于固体润滑涂层技术领域。
背景技术
固体润滑涂层是宇航工程和军事领域装备运动机构可靠运行的关键技术之一,主要应用于高/低温、真空、强辐射等场合,以及腐蚀性介质、电触点、某些金属或塑料材料的热加工等机械设备的减摩抗磨。随着我国新一代航空航天装备和武装作战装备的发展,固体润滑涂层将承受更高更宽的工作温度、更大的冲击载荷和频率、液体介质、大气-真空辐照多种服役环境等苛刻的工作条件。
固体润滑涂层中的润滑相能否承受高温,或其能否在不同温度下自适应生成具有润滑功能的物质是涂层高温摩擦学性能的决定性因素,目前这些润滑相主要包括过渡族金属硫化物(MoS2和WS2等)、DLC类涂层、低熔点金属和摩擦自生复合氧化物。就广泛应用于航空航天的MoS2基空间固体润滑涂层而言,其在摩擦过程中可自发晶面择优取向,同时在配副材料表面形成转移膜,在真空环境表现出优异的摩擦学性能。然而,传统的过渡族金属硫化物普遍存在环境适应性差、大气潮湿存储环境易氧化、极限温度低(<350℃)导致摩擦学性能急剧下降的共性问题。与过渡族金属硫化物涂层特性相反,传统的无氢DLC涂层在大气潮湿环境中则可通过与水分子的交互作用或自身纳米级光滑表面发挥优异的摩擦学性能;但在高真空环境中却由于缺乏有效的表面钝化,其强烈的C-C原子相互作用会导致高的黏着磨损,摩擦学性能急剧恶化。对DLC涂层进行氢化处理,碳悬键的终止以及类石墨转移膜的形成可有效降低其在真空环境中的摩擦,但是在存在水蒸气或其他蒸汽时由于表面覆盖的O或H离子而退化,导致摩擦增大。低熔点金属具有低的剪切强度,是一种极好的中低温润滑剂,具有显著的热和化学稳定性,在摩擦过程中经历塑性变形,分离接触表面而降低摩擦;然而,随着温度的升高其硬度降低,当温度高于500℃时丧失抗压能力,不能有效地分离滑动表面或支撑载荷。探究新型摩擦学性能优异的高温润滑相,并在此基础上实现高温、潮湿、大气/真空环境下的低摩擦自适应性是新一代空间固体润滑涂层的研究重点。
发明内容
为了克服现有高温固体润滑涂层技术的不足,本发明的目的是开发以硅酸盐类材料作为高温润滑相的固体润滑涂层,以期望得到具备更优摩擦学性能的高温润滑涂层。
一种温度自适应超滑的固体润滑涂层制备方法,包括以下步骤:
步骤(1)、选取目标金属材料,使用喷砂机对其表面进行喷砂处理,金属表面最终粗糙度达到Ra 0.1~0.3,然后使用酒精或丙酮对金属材料进行超声清洗,去除其表面油污或杂质;
步骤(2)、设置粘结剂和有机溶剂质量比例,将二者混合并设置搅拌速度、搅拌时间和搅拌温度进行磁力搅拌,得到涂层制备所需溶剂体系;
步骤(3)、设置硅酸盐类材料、粘结剂、有机溶剂质量比例,称取一定质量的某一种硅酸盐材料于步骤(2)得到的溶剂体系中,设置搅拌速度和搅拌时间对固体润滑涂层体系进行磁力搅拌;
步骤(4)、使用喷涂法并设置喷涂参数,进行步骤(3)得到涂层材料在步骤(1)得到金属表面的涂层制备,初步得到复合固体润滑涂层;
步骤(5)、将喷涂有复合固体润滑涂层的金属材料移入烘干箱中,在预订的温度下进行干燥,得到具有温度自适应超滑的固体润滑涂层。
所述步骤(1)中,所述金属材料包括但不限于:低碳钢、中碳钢、高碳钢、低合金钢、中合金钢、高合金钢、铜合金等。
所述步骤(2)中,所述粘结剂包括但不限于:环氧树脂、酚醛树脂、聚酰亚胺、磷酸二氢铝等;所述有机溶剂包括但不限于:酒精、丙酮、石油醚、二甲基甲酰胺等。
所述步骤(2)中,所述硅酸盐材料包括但不限于:天然硅酸盐矿物,如蛇纹石、叶腊石、高岭石、蒙脱石、埃洛石、滑石、绿泥石、云母等;水热合成片状、管状、球状等硅酸盐纳米材料,如纯羟基硅酸镁、无定形碳包覆羟基硅酸镁、石墨烯包覆羟基硅酸镁、镍掺杂羟基硅酸镁、氟掺杂羟基硅酸镁等。
所述步骤(4)中,喷涂法包括但不限于:空气喷涂、无气喷涂、液体静电喷涂、HVLP喷涂等。
本发明的优点是在多种金属基体表面制备能够实现20~500℃范围内的温度自适应超滑硅酸盐固体润滑涂层的方法简单可靠,制得的固体润滑涂层在大气高温/低温往复循环条件下表现出了特别优异的摩擦学性能,能够降低摩擦系数至低于0.01,显著减少磨损,使得机器运行平稳,并在很大程度上延长设备的使用寿命。
本发明可操作性强,通过控制涂层配方和喷涂参数,可以控制获得的固体润滑涂层的厚度。
附图说明
当结合附图考虑时,通过参照下面的详细描述,能够更完整更好地理解本发明以及容易得知其中许多伴随的优点,但此处所说明的附图用来提供对本发明的进一步理解,构成本发明的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定,如图其中:
图1是根据本发明实施例1中一种温度自适应超滑的固体润滑涂层的表面扫描电镜图片;
图2是根据本发明实施例1中一种温度自适应超滑的固体润滑涂层的截面透射电镜图片。
下面结合附图和实施例对本发明进一步说明。
具体实施方式
显然,本领域技术人员基于本发明的宗旨所做的许多修改和变化属于本发明的保护范围。
本技术领域技术人员可以理解,除非特意声明,这里使用的单数形式“一”、“一个”、“所述”和“该”也可包括复数形式。应该进一步理解的是,本说明书中使用的措辞“包括”是指存在所述特征、整数、步骤、操作、元件和/或组件,但是并不排除存在或添加一个或多个其他特征、整数、步骤、操作、元件、组件和/或它们的组。应该理解,当称元件、组件被“连接”到另一元件、组件时,它可以直接连接到其他元件或者组件,或者也可以存在中间元件或者组件。这里使用的措辞“和/或”包括一个或更多个相关联的列出项的任一单元和全部组合。
本技术领域技术人员可以理解,除非另外定义,这里使用的所有术语(包括技术术语和科学术语)具有与本发明所属领域中的普通技术人员的一般理解相同的意义。
为便于对本发明实施例的理解,下面将做进一步的解释说明,且各个实施例并不构成对本发明实施例的限定。
实施例1:一种温度自适应超滑的固体润滑涂层,包括以下步骤:
选用的金属材料为铜材料,选用的粘结剂为酚醛树脂,选用的有机溶剂为二甲基甲酰胺,固体润滑材料为叶腊石型硅酸盐材料。
选定粘结剂:二甲基甲酰胺:叶腊石质量比为1:5:2,选定喷涂方法为空气喷涂。
具体为:选取铜金属材料,使用砂纸和抛光机对其表面进行喷砂处理至粗糙度达到Ra 0.3,然后使用酒精或丙酮对金属材料进行超声清洗,去除其表面油污或杂质;分别称取1g的热塑性型酚醛树脂粉末和5g的二甲基甲酰胺溶剂,设置搅拌速度200rpm、搅拌时间30min将二者充分混合磁力搅拌;称取2g天然叶腊石粉末材料于有机溶剂中,设置搅拌速度200rpm、搅拌时间30min将粉体充分分散与液体中;设置喷枪压力0.8MPa、垂直喷涂距离30cm、喷枪移动速度30cm/s,将涂层材料喷涂于金属基体表面;喷涂完成后,设置烘干箱温度180℃,烘干时间2h,得到能够实现温度自适应超滑的复合固体润滑涂层。
该环境自适应超滑的固体润滑涂层表面微观形貌和截面透射形貌分别如图1和图2所示。
从图1和图2可以看出,本发明实施得到的固体润滑涂层厚度约为60μm。
Claims (5)
1.一种温度自适应超滑的固体润滑涂层制备方法,其特征在于包括以下步骤:
步骤(1)、选取目标金属材料,使用喷砂机对其表面进行喷砂处理,金属表面最终粗糙度达到Ra 0.1~0.3,然后使用酒精或丙酮对金属材料进行超声清洗,去除其表面油污或杂质;
步骤(2)、设置粘结剂和有机溶剂质量比例,将二者混合并设置搅拌速度、搅拌时间和搅拌温度进行磁力搅拌,得到涂层制备所需溶剂体系;
步骤(3)、设置硅酸盐类材料、粘结剂、有机溶剂质量比例,称取一定质量的某一种硅酸盐材料于步骤(2)得到的溶剂体系中,设置搅拌速度和搅拌时间对固体润滑涂层体系进行磁力搅拌;
步骤(4)、使用喷涂法并设置喷涂参数,进行步骤(3)得到涂层材料在步骤(1)得到金属表面的涂层制备,初步得到复合固体润滑涂层;
步骤(5)、将喷涂有复合固体润滑涂层的金属材料移入烘干箱中,在预订的温度下进行干燥,得到具有温度自适应超滑的固体润滑涂层。
2.根据权利要求1所述的一种温度自适应超滑的固体润滑涂层制备方法,其特征在于所述步骤(1)中,所述金属材料包括但不限于:低碳钢、中碳钢、高碳钢、低合金钢、中合金钢、高合金钢、铜合金等。
3.根据权利要求1所述的一种温度自适应超滑的固体润滑涂层制备方法,其特征在于所述步骤(2)中,所述粘结剂包括但不限于:环氧树脂、酚醛树脂、聚酰亚胺、磷酸二氢铝等;所述有机溶剂包括但不限于:酒精、丙酮、石油醚、二甲基甲酰胺等。
4.根据权利要求1所述的一种温度自适应超滑的固体润滑涂层制备方法,其特征在于所述步骤(2)中,所述硅酸盐材料包括但不限于:天然硅酸盐矿物,如蛇纹石、叶腊石、高岭石、蒙脱石、埃洛石、滑石、绿泥石、云母等;水热合成片状、管状、球状等硅酸盐纳米材料,如纯羟基硅酸镁、无定形碳包覆羟基硅酸镁、石墨烯包覆羟基硅酸镁、镍掺杂羟基硅酸镁、氟掺杂羟基硅酸镁等。
5.根据权利要求1所述的一种温度自适应超滑的固体润滑涂层制备方法,其特征在于所述步骤(4)中,喷涂法包括但不限于:空气喷涂、无气喷涂、液体静电喷涂、HVLP喷涂等。
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