期刊
CIRP ANNALS-MANUFACTURING TECHNOLOGY
卷 50, 期 1, 页码 239-242出版社
TECHNISCHE RUNDSCHAU EDITION COLIBRI LTD
DOI: 10.1016/S0007-8506(07)62113-1
关键词
glass-ceramic; fracture strength; ultra-precision machining
Zero-thermal-expansion glass-ceramic is a key material in ultra-precision engineering. However, applications of this material have been limited in static components, because of a lack of data on the fracture strength of this material. We examine the fracture strength of the material by means of a 4-point bending test on samples machined using various methods. Etching technology is useful in increasing the strength, which strongly depends upon the surface roughness after etching. The float-polished sample has a fracture strength of 546MPa, which is more than 4 times higher than that of normally machined surfaces, and also much higher than that of alumina.
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