Tribological Characteristic Evaluation of Tungsten Disulfide Solid Lubrication Films
Tribological Characteristic Evaluation of Tungsten Disulfide Solid Lubrication Films
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二硫化钨固体润滑膜的摩擦学特性评价
DOI：
10.2322/tastj.12.tc_13
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
K. Hashimoto
中科院分区：
文献类型：
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作者：
Ayaka Takahashi;K. Hashimoto
航天器要在恶劣的外层空间环境中使用，也可能从地面造成意想不到的问题。为了解决这些问题，重要的是航天器的许多滑动部分已经通过润滑处理制备。固体润滑剂适用于低压、温度变化大的空间环境。金膜和二硫化钼是航天器上主要的固体润滑剂。这些材料已经使用各种添加剂检查了摩擦学特性。虽然这些润滑剂已被应用于各种空间环境中，但与二硫化钼具有相同晶体结构的二硫化钨尚未得到深入研究。本文研究了二硫化钨作为固体润滑剂在航天器上的应用。为了模拟展开摩擦，分别在真空和空气中对镀有二硫化钨的铝合金和不锈钢进行了往复摩擦试验。结果表明，二硫化钨润滑剂涂层的摩擦系数最低。但它也达到了它的磨损寿命之前，在真空中的测试时间结束。为了提高二硫化钨的耐磨性，研究了二硫化钨粉末与聚酰胺酰亚胺混合涂层的耐磨性。结合EDS-SEM观察到的磨损形态，阐明了两种涂层方法的比较。
To be used in severe outer space environments, spacecraft may also cause unexpected problems from the ground level. In order to solve the problems, it is important that many of the sliding portions of the spacecraft have been prepared by the lubrication processing. A solid lubricant is suitable in the space environment such as a low pressure and wide temperature changes. Gold film and molybdenum disulfide have been mainly utilized for solid lubricant in spacecraft. These materials have been already examined the tribological characteristics using the variety of additives. Although these lubricants have been applied in the various space environments, tungsten disulfide which has the same crystal structure as molybdenum disulfide has not been studied intensively. In this study, tungsten disulfide has been examined for the application of the solid lubricant in the spacecraft. In order to simulate the deployment friction, the reciprocating tribometer experiments were conducted in a vacuum and air using the aluminum alloy and the stainless steel substrates coated by tungsten disulfide. It was found that the tungsten disulfide lubricant coating have demonstrated the lowest friction coefficient among other solid lubricants. But it also reached its wear life before the end of test duration in a vacuum. To improve the wear life of tungsten disulfide, substrates which coated by mixture of tungsten disulfide powder and polyamideimide have been studied. Comparisons of the two coating methods have been elucidated in conjunction with wear morphology observed by EDS-SEM.