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48.4: The Mirror Constant of Glass Substrates by 4PB Test
Author(s) -
Lin MaoHsing,
Pan WeiWu,
Cheng PoJen,
Huang KunFeng
Publication year - 2014
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/j.2168-0159.2014.tb00183.x
Subject(s) - fractography , fracture (geology) , materials science , brittleness , composite material , constant (computer programming) , bending , brittle fracture , stress (linguistics) , point (geometry) , geometry , computer science , mathematics , programming language , linguistics , philosophy
Fractography is one of the methods to identify the condition that fracture occurred on brittle material, such as glass. There are several geometric characteristics on fracture surface, including mirror, mist, hackle, wallner lines, etc. to help to observe where the origin is and how much stress it suffered when broken. This study uses four‐point bending test to obtain the fracture stress on test specimens and performs fractographic analysis to find out the mirror constant on glass substrates in different manufacturing processes. This article makes the clues to track if the glass was broken, whereas provides the hints to improve the glass strength in further steps.