Antiscoring properties

Aluminum babbitt has been a U.S. alternative (6,20). On cooling this molten material, 8% lead separates from the aluminum as globules at the surface for improved antiscoring properties. More recendy, a sintered lead—alurninum containing 8.5% lead, 4% siUcon, 1.5% tin, and 0.5% copper has been developed for automotive use. 

The laminated (RP) fabric, bonded with phenolic plastic incorporating antifriction ingredients and cured under heat and pressure, gives excellent service when properly applied in various applications. This group of bearings has a low coefficient of friction, antiscoring properties, and adequate strength for use in steel mills and other heavy-duty applications and is well established in the industry. 

Their mechanism can be presented as follows. During thermal treatment, FO contact the polymer melt and the oxides partially reduce to metals [72]. This leads to the generation of microchains M1-P-M2 in the lubricant bulk and formation of an MPE as a result of electrochemical interactions of unlike metal components. As a consequence, adhesive interactions between the filler and binder intensify. In our view, the high level of antiscoring properties and low friction coefEcient can be attributed to the catalyzing effect of the reduced metals on the formation of the friction polymers from the products of mechanical destruction of organic components of the lubricant. 

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