Wear, corrosion and fracture are primary forms of materials failure. The main reason of materials failure is wear caused friction. About 70%~80% equipment damage is resulted from various wear. Investigation results that done by Britain and USA indicate that the expense brought material failure is estimated about one hundred billion $ in one year; economic benefit brought by improving lubrication and decreasing wear accounts for over 2% of Gross National Product. In addition, with high-speed develop...