Many types of chemicals have been studied as base fluids for synthetic lubricant^.^,^ These include esters, polyglycols, hydrocarbons, phosphate esters, silicones, silicate esters, polyphenyl ethers, halogenated JSL (1) 6-3 3 J S L 1-1

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The mechanical properties of fiber-reinforced composite materials are highly dependent on proper saturation of the resin within the reinforcement fibers. The research evaluates the effect of ultrasonic treatment during composite curing, in an effort to increase interlaminar bonding strength, lower void content, and improve the matrices ability to transfer stresses to the reinforcement fiber. The testing methods that were performed evaluated the effects or the ultrasonic treatment on the specimen in three point bending, and shear between layers of the matrix. The mechanical properties and the microstructure of the test specimen are discussed.