Abstract
An apparatus was developed for measuring internal friction automatically with high accuracy at high temperatures. The composition dependence of the internal friction in an Al2O3–3Y–ZrO2 system was investigated at room temperature using it. The results showed that no cracks were produced in the 3Y–ZrO2 contents less than 40%, and that an energy absorption peak existed at about 20% 3Y–ZrO2 content.