Behavior of fullerene-like WS2 nanoparticles under severe contact conditions
Behavior of fullerene-like WS2 nanoparticles under severe contact conditions
复制标题
DOI：
10.1016/j.wear.2005.01.009
复制
发表时间：
2005-07-01
期刊：
影响因子：
5
通讯作者：
Tenne, R
中科院分区：
文献类型：
--
作者：
Rapoport, L;Nepomnyashchy, O;Tenne, R
富勒烯类WS 2（MoS 2）纳米颗粒（IF）在过去已经被研究。结果表明，IF纳米石蜡似乎形成了一种保护膜，允许在混合润滑下增加摩擦副的负载能力。本工作的主要目的是评估的IF纳米粒子在严重的接触条件下的行为-转变为扣押。研究了IF纳米粒子在多孔氧化铝基体上的抛光对高接触压力下Al_2O_3-Si_3N_4摩擦副摩擦磨损性能的影响。结果表明，当接触表面之间的差距小于IF纳米颗粒的尺寸时，纳米颗粒对摩擦力没有影响。随着载荷的增加，IF纳米颗粒渗透到界面，保护摩擦表面不直接接触，从而增加了转变为咬合的临界点。通过IF固体润滑剂纳米颗粒对多孔氧化铝表面的抛光在高接触压力下提供非常低的摩擦系数和磨损损失。发现IF-WS 2纳米颗粒被保留在粗糙的顶点中，填充山谷和烧结氧化铝的孔隙，从而限制陶瓷表面之间的直线接触。虽然IF-WS 2纳米颗粒的最外层的外部片被剥离，但原始的IF纳米颗粒保留在氧化铝的谷和孔中，在长期测试期间将固体润滑剂片供应到接触区域。(c)2005 Elsevier B. V.保留所有权利。
Fullerene-like WS2 (MoS2) nanoparticles (IF) have been studied in the past. It was shown that the IF nanopaticles appear to form a protective film allowing increased load capacity of the rubbed pairs under mixed lubrication. The main objective of the present work is to evaluate the behavior of the IF nanoparticles under severe contact conditions-the transition to seizure. The effect of the IF nanoparticles burnished to porous alumina matrix on friction and wear of alumina-Si3N4 pair under high contact pressure is also considered. It was shown that when the Gap between the contact surfaces is smaller than the size of the IF nanoparticles, there is no effect of the nanopaprticles on the friction force. With load increasing, the IF nanoparticles penetrate into the interface, protecting the rubbed surfaces from a direct contact and thus increase the critical point of transition to seizure. Burnishing of the porous alumina surfaces by the IF solid lubricant nanoparticles provides very low friction coefficient and wear loss under high contact pressure. The IF-WS2 nanoparticles are found to be preserved in the rough summits, fill the valleys, and the pores of the sintered alumina and thus limit the straight contact between the ceramic surfaces. Although the external sheets of the outermost layers of the IF-WS2 nanoparticles were peeled-off, the pristine IF nanoparticles remain in the valleys and pores of the alumina supplying the solid lubricant sheets to the contact area during a long-term test. (c) 2005 Elsevier B.V. All rights reserved.