... is less studied (Zhao et al., 2001). The polymer/inorganic composite nano-microsphere possesses properties of both inorganic material and organic material. Thus, the material can improve not only the lipophilic of inorganic materials in the oil but also the “micro-rolling” property of microscopic...

... pump, poor lubrication is more likely to happen than in a oil hydraulic one because of differences in properties between water and oil. There are some key problems, such as corrosive wear and erosion, which are briefly investigated in this paper. Many new materials have been developed, which give...