Brittle-mode grinding

The grinding energy required for ductile mode is different from that for brittle mode. Based on the concept of the critical depth-of-cut d, which has attracted considerable attention so far, a general description has been successfully introduced to express the brittle-ductile relationship. 

Dividing this by the removed volume V at the brittle mode or Vp at the ductile mode, the specific grinding energy pf and Xp are given as... 

Grinding operation is one of the most effective methods used for hig smoothness machining of fine ceramics. It is difficult, however, to achieve crack-free high smoothness surfaces by ductile-mode grinding because of their mechanical properties of high brittleness [1]. Therefore, it is necessary... 

The ductile-mode grinding of brittle optical parts is studied in this research. The implementation of ductile-mode cutting requires expensive items like ultraprecision vibration-free rigid machine tools, high-resolution feeding motion control, submicron grit wheels, clean work environment, and so on. The conclusions of this study are as follows ... 

The material removal mechanism for ELID double-side grinding was brittle-fracture mode for coarser wheels and ductile mode for finer wheels. 

ELID-lap grinding of silicon was achieved in a brittle-fracture mode for JIS 1200 and down and in a ductile mode for JIS 4000 and up. 

When the surface of grinding wheel is covered with an oxide film, wear intensity is caused by a brittle fracture, during which large flake-like wear particles are formed by a surface crack propagation (Kitsubnai et al., 1991). We call this wear mode as flake formation. 

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