Open AccessStudy of crack healing effect in dimethyl phthalate crystals by mechanical spectroscopy
Author(s) -
Zhou Heng-Wei,
Lina Wang,
Xiuzhen Guo,
Wu Na-Na,
Zhang Li,
Zhang Jin-Lu,
Yineng Huang
Publication year - 2010
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.59.2120
Subject(s) - materials science , recrystallization (geology) , cracking , crystal (programming language) , composite material , melting point , environmental stress cracking , thermodynamics , stress corrosion cracking , paleontology , physics , computer science , biology , programming language , alloy
The recently developed method to detect the stress-cracking and crack healing of glasses in real-time called the RMS-CH in shortWu et al.Appl. Phys. Lett. 92011918-12008 is applied to the detections of crystals. The experimental results of dimethyl phthalate crystal indicate thatunder the condition of constant heating rate1 the crack-healing rate shows a sharp peak as a function of temperaturethe peak temperature can be taken as the characteristic temperature Tcch of the crack-healing and Tcch=206 K2 the peak is not symmetricand the low temperature side is wider than the high temperature sidewhich means that the crack-healing has started at lower temperatures and the amount of healing below Tcch is more than that above Tcch. This behavior is similar to that in glassesbut Tcch is higher than that of glassy state. MoreoverTcch is much lower than the melting point of the crystalwhich indicates that the crack-healing mechanism is quite different from that of recrystallization. We would like to point out that two dynamical loss peaks related to the crack-healing process are observed for the first timewhich will be helpful to the understanding of the mechanisms. The above results also show the feasibility and validity of the RMS-CH method to investigate the stress-cracking and crack-healing in crystals as in glasses.