Research On The Controllable-viscosity Green Water-based Lubricant And Its Tribological Properties For Ceramics Friction Couples

In recent years taking into account the low viscosity and spatter property of water,water lubrication technology has been developing rapidly. However, some problemsthat the water itself contains easily corroded metal and is in a lower carrying capacityof water film also exist. Thus in order to meet the industrial application thecorresponding modification of water needs to be done. This research project aims todevelop a new type of green liquid lubricant with the controllability of its viscosity,tests its viscosity, density, specific heat and anti-rust property and on this basis does aseries of test on friction and wear properties under different circumstances of ceramicfriction pairs and eventually arrives at the best engineering ceramic friction materials.In this project water was made an appropriate modification. Through the analysisof lubricant additives, suitable composition of water-based anti-rust additive andantifoamer is obtained, and a new water-based lubricant is formed. The research alsocontains mixing three kinds of organic anti-rust agents including triethanolamineborate, sebacic diacid triethanolamine and triethanolamine oleate and choosingsilicone defoamer for anti-foaming processing, which can mix with lubricants steadilyand is in good lubrication. By orthogonal experiments of Anti-rust properties,Optimization of lubricant formulations is gained, and the amount of various additivesis identified. And this project also evaluates the appearance, transparency, defoamingand antirust of the new lubricants, and gets good results.In the new water-based lubricant, viscosity is changed by adding aviscosity-adjusting agent. And the viscosity and temperature experiment also showsthat if temperature increases, viscosity decreases while if temperature decreases,viscosity increases. The viscosity-temperature curve of low-viscosity lubricants seemsmore smooth and its performance is more superior. At last, least-squares method isused to complete the MATALB curve fitting. Some research is also done on testingthe density of lubricant and the physical performance of the specific heat and thedensity and the specific heat of the new lubricant at room temperature is obtained.In this project, the aotogamia of the ceramics friction with two kinds ofengineering, SiC and Si3N4 is carried out. The research is done under the condition ofdry friction, water and the new water-based lubricant. Through the analysis and measurement on the wear rate and lriction coefficient of ceramics with these twokinds of structures, SiC and Si3N4, the best engineering ceramics friction material isfinally obtained. Meanwhile, compared with water, the new lubricant has betterlubrication.