Carbon fiber-reinforced resin mineral composites have been fabricated under various postcure temperatures. The effects of postcure temperature and fiber dosage on the thermal expansion behaviour of resin mineral composite have been systematically investigated. The resin matrix postcured at 110℃ shows the lowest coefficient of thermal expansion values as a result of the increasing of glass transition temperature (Tg). The unreinforced resin mineral composite postcured at 110℃ shows the lowest coefficient of thermal expansion values as a result of the decreasing coefficient of thermal expansion values and the increasing modulus of resin matrix. The coefficient of thermal expansion of carbon fiber-reinforced resin mineral composites decreases with increasing the carbon fiber dosage. The carbon fiber-reinforced resin mineral composites show the lowest coefficient of thermal expansion values when the fiber dosage is 1.2%. The theoretical models agree well with the experimental results. Our study indicates that high postcure temperature technique and carbon fiber-reinforced technique are promising routes for the development of resin mineral composite for precision machining tools.
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