陶瓷磨具热膨胀系数测定条件研究

本文对陶瓷结合剂磨具热膨胀系数测定条件及影响因素进行了研究，结果表明，烧后试样的热膨胀系数比未烧的高；热膨胀系数值随烧结温度的提高和烧结致密度的提高而增加，热膨胀系数测定值受测定升温速度的影响，升温速度快的测定值较小；陶瓷磨具产品及陶瓷结合剂热膨胀系数的测定应测烧后麻样的,为了使测试结果具有可比性，应使所测试样的致密性和测定升温速度等条件一致。

Investigation on the Measuring of the Dilatometry of Vitrified Bond Grinding Tools

In this paper, the measuring conditions of dilatometry for vitrified bond grinding tools were investigated. The results showed that the coefficients of thermal expansion(CTE) of as-sintered samples were higher than those of green samples . The CTEs increased with increasing of the sintering temperature and sample' s density. The CTEs were affected by heating rate. With high heating rate, the CTEs were lower. When measuring CTEs of vitrified bond tools and vitrified bonds themselves we should use as-sintered samples rather than the green samples. The measurement of CTE should be carried out under the same test conditions so as to make CTE data comparable