Cracking phenomena in lithium-di-silicate glass ceramics

Bulletin of materials science

Rajat Banerjee¹ 

[1] Central Glass and Ceramic Research Institute, Kolkata 700 032, India$$Central Glass and Ceramic Research Institute, Kolkata 700 032, IndiaCentral Glass and Ceramic Research Institute, Kolkata 700 032, India$$

关键词: Lithium-di-silicate;    crystals;    angle of rotation;    crack driving force.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Lithium-di-silicate glass ceramic (Li₂O, SiO₂) with uniformly oriented crystals was placed on a Vickers indentation with extrusion axis horizontally parallel to the base axis. The material was rotated through 0°â€�?? 90° and at each angle a 20 N load was applied to ascertain the crack path. It was observed that the crack length decreases and the crack deviates from its original path with increasing angle. The deviation of the crack was correlated with the component of the crack driving force and the theoretical strength of the aligned crystals at different angles.

【 授权许可】

Unknown