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Analysis of super-low friction mechanisms of carbon nitride in nitrogen gas lubrication and development of low frictiioon tribo-system

氮化碳氮气润滑超低摩擦机理分析及低摩擦摩擦系统开发

基本信息

批准号：
18360075
负责人：
ADACHI Koshi
金额：
$ 10.62万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360075/
关键词：
Super-low friction Carbon nitride Nitrogen gas Running-in Silicon nitride Graphite Atmospheric condition Dry air 酸素ガス

项目摘要

In case of carbon nitride coatings, super-low friction coefficient on the order of 0.001 is achieved in sliding against itself or silicon nitride in the stream of nitrogen gas.In this study, effect of exposure condition after deposition of carbon nitride coatings and running-in process on friction properties of carbon nitride coatingssliding against itself or silicon nitride in nitrogen gas is investigated to clarify the super-low friction mechanisms and to develop low friction system with carbon nitride coatings.Furthermore, possibility of further lower friction and necessary surface conditions for stable and low friction coefficient as low as 0.03 are investigatedFollowing are main results of this research.(1) The average values of friction coefficient of carbon nitride coating sliding against silicon nitride ball in nitrogen gas condition varied from 0.003 to 0.6 by exposure condition after deposition of the carbon nitride coating.(2) When carbon nitride coatings are exposed to oxygen gas first for 100 seconds after deposition of carbon nitride coatings, and then exposed to ambient air with 40-60% RH for 30 minutes, the friction coefficient in nitrogen gas condition shows as low as 0.003.(3) By introducing 500 cycles of pre-sliding in ambient air, friction coefficient reduces from 0.07 to 0.004 and specific wear rate of ball also reduces from 1.0×10^<-7>mm^3/Nm to 1.0×10^<-10>mm^3 on sliding of carbon nitride against itself in nitrogen gas stream.(4) Friction coefficient of lower than 0.01 is observed in nitrogen gas stream by giving optimum range of 50 to 1,000 cycles of pre-sliding in ambient air.

在氮化碳涂层的情况下，在氮气流中相对于其自身或氮化硅滑动时实现了0.001量级的超低摩擦系数。研究了氮化碳涂层沉积后的暴露条件和磨合过程对氮化碳涂层在氮气中与自身或氮化硅摩擦性能的影响，以阐明氮化碳涂层在氮气中的优越性。101探讨了氮化碳涂层的低摩擦机理和低摩擦系统的研制，并探讨了进一步降低摩擦的可能性和获得低摩擦系数（0.03）的必要表面条件。(1)在氮气条件下，氮化碳涂层与氮化硅球滑动的摩擦系数的平均值在沉积氮化碳涂层后的暴露条件下从0.003变化到0.6。(2)当氮化碳涂层在沉积后首先暴露于氧气中100秒，然后暴露于环境空气（40- 60%RH）中30分钟时，在氮气条件下的摩擦系数显示为低至0.003。(3)在空气中预滑动500次后，氮化碳在氮气流中的摩擦系数从0.07降低到0.004，比磨损率也从1.0×10^<-7>mm^3/Nm降低到1.0×10^<-10>mm^3。(4)通过给出在环境空气中预滑动50至1，000次循环的最佳范围，在氮气流中观察到低于0.01的摩擦系数。