Indentation Technique as a Means to Evaluate the Residual Stress on the Surface of Glasses and Ceramics

抄録

Vickers indentation technique to evaluate the residual stress on the surface of glasses and ceramics was studied. The basis of the technique is to use cracks from a small indentation as a microprobe to measure the residual stress at a specific point around a large indentation and to study the change of the residual stress caused by heat treatment. With regard to display glasses with different strain points, the residual stresses decreased by heat treatment at temperatures as low as 300°C below the strain point, and became zero by keeping the indented specimen at temperatures close to the strain point of each glass. The residual stress in Si showed a strong dependence on the brittle-ductile transition characteristics. The technique is also applicable to other ceramics such as polycrystalline and single crystalline SiC.