Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 126, Issue -, Pages 122-129Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2019.04.030
Keywords
Ceramic matrix composite; Cyclic thermal shock; Micro-structural evolution; Thermo-mechanical damage; Porosity increment
Funding
- China Natural Science Foundation [11572169, 51775294]
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The oxide/oxide ceramic matrix composites display complex mechanical behavior under thermo-mechanical loading conditions. The present work focuses on micro-structural evolution and resultant macroscopic properties during cyclic thermal shocks. Micro-structural investigation reveals that variations of nano-, micro- and macro-pores in the matrix characterize collective behavior of micro-structural evolution in the material. Material damage development is characterized by micro-cracking in the matrix and can be described by the matrix porosity increment. The present investigation confirms the unique correlation between the porosity and the micro-structural degradation evolution of the material under different loading conditions.
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