Friction and wear of bronze powder composites including fullerene-like WS2 nanoparticles
Friction and wear of bronze powder composites including fullerene-like WS2 nanoparticles
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DOI：
10.1016/s0043-1648(01)00519-1
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发表时间：
2001-04
期刊：
影响因子：
5
通讯作者：
L. Rapoport;M. Lvovsky;I. Lapsker;W. Leshchinsky;Y. Volovik;Y. Feldman;R. Tenne
中科院分区：
文献类型：
--
作者：
L. Rapoport;M. Lvovsky;I. Lapsker;W. Leshchinsky;Y. Volovik;Y. Feldman;R. Tenne
在过去的几年中，WS 2和MoS 2纳米颗粒（IF）的结构与（嵌套）碳富勒烯和纳米管密切相关的合成。之前已经表明，向润滑液中添加少量的这种纳米颗粒可以大大改善接触表面的摩擦学性能。在本工作中，浸渍的纳米粒子到多孔粉末（青铜石墨）矩阵进行了演示。测定了矿物油、2 H-WS 2片晶和IF纳米粒子浸渍的粉末基体的临界咬合点，分别为300、570和950 N。测定了粉末基体在油和油+IF-WS 2润滑下的摩擦系数。结果发现，与仅由油润滑的表面相比，在油中添加IF纳米颗粒使摩擦系数降低30-50%。与2 H-WS 2片晶相比，IF纳米颗粒的主要作用似乎是纳米颗粒在孔内长时间储存以及逐渐释放和提供给接触表面。一旦从孔中释放出来，IF纳米颗粒可以更好地保护摩擦表面免受直接接触。
In the past few years, WS2and MoS2nanoparticles (IF) with structures closely related to (nested) carbon fullerenes and nanotubes have been synthesized. It was shown before that addition of a small amounts of such nanoparticles to lubricating fluid largely improve the tribological properties of contact surfaces. In the present work, impregnation of the nanoparticles into a porous powder (bronze–graphite) matrix is demonstrated. The critical point to seizure of the powder matrix impregnated with mineral oil, 2H–WS2platelets and IF nanoparticles was measured and is 300, 570 and 950N, respectively. The friction coefficient of the powder matrix lubricated by oil and oil+IF-WS2was measured. It was found that the addition of the IF nanoparticles in the oil decreased the friction coefficient by 30–50% as compared to the surfaces lubricated by the oil alone. The main effect of IF nanoparticles in comparison to 2H–WS2platelets appears to be the storage of the nanoparticles for long periods of times within the pores and the gradual release and furnishing to the contact surface. Once released from the pores, IF nanoparticles protect better the rubbed surfaces against straight contact.