NbSe2纤维的制备及其摩擦学行为
详细信息Synthesized and tribological behavior of NbSe2 fibers
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摘要: 为探索新型润滑材料，将Nb和Se密闭在石英容器中，高温下反应，得到NbSe3，将其研磨、干燥后在氩气保护气氛中于700℃分解，制得直径为80 nm～160 nm的NbSe2纤维。用扫描电子显微镜、透射电子显微镜、X射线衍射仪等检测产物的相组成及形貌。利用UTM-2型微观摩擦试验机测试其作为润滑油添加剂的摩擦学性能。结果表明，在室温大气下，添加NbSe2纤维的润滑油较纯润滑油和添加普通NbSe2粉末的润滑油有较好的润滑能力和抗磨性能， 其主要原因是NbSe2纤维具有独特稳定的结构。将纳米NbSe2与青铜粉混合，制备出铜基复合材料，摩擦实验证明，NbSe2纤维能明显降低铜基复合材料的摩擦系数，这可能归因于摩擦过程中在摩擦表面形成的一层润滑膜。Abstract: For search of new lubricant materials，NbSe2 fibers with diameters range of 80～160 nm were synthesized by the thermal decomposition of NbSe3 obtained from the reaction of Se and Nb in the airtight vessel. The phase constitution and the morphology of the NbSe2 fibers were analyzed by means of X-ray diffraction，scan electron microscopy and transmission electron microscopy. The tribological behavior of NbSe2 fibers as lubricating oil additive was investigated by the UMT-2 multi-specimen test system. The results show that the oil with NbSe2 fibers has better tribological properties than the pure oil and the oil with common layered NbSe2 at atmosphere. This could be attributed to the steady structure of the NbSe2 fibers. The copper sintered material with NbSe2 fibers was prepared by the process of powder metallurgy. The incorporation of NbSe2 fibers leads to the great reduction of friction coefficients under all kinds of loads，which may be attributed to the lubricating film formed on the worn surface.
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Keywords:
- NbSe2 /
- fibers /
- additive /
- copper composite /
- tribological property
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