Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 41, Issue 10, Pages 5394-5399Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2021.04.031
Keywords
Alumina slurry; Oxide/oxide composite; Weak matrix; Microstructure; Mechanical properties
Categories
Funding
- Natural Science Foundation for Distinguished Young Scholars of Hunan Province [2020JJ2032]
- 1912 Project
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In this study, a high solid content alumina slurry was used to prepare NextelTM 610 fiber reinforced alumina composite, and a rapid lamination route was proposed. The composite showed reduced shrinkage cracks in the matrix and maintained a porous structure. The mechanical properties of the N610/alumina composite, with weak matrix and weak interface, were investigated and found to be higher than many oxide/oxide composites.
The alumina slurry with high solid content was prepared, and a rapid lamination route for fabricate the NextelTM 610 fiber reinforced alumina composite was proposed in this work. The microstructure and mechanical properties of the as-received all-oxide composite were investigated by a series of techniques. The shrinkage cracks in matrix were reduced, while porous structure in composite was maintained. The N610/alumina composite has weak matrix and weak interface, as the Young's modulus of the alumina matrix and the interfacial shear strength of the composite are 140.8 +/- 2.5GPa and 129.1 +/- 14.6MPa. The mechanical properties of the composite are much higher than lots of oxide/oxide composites, given its flexural strength, interlaminar shear strength and the fracture toughness are 398.4 +/- 5.7MPa.27.0 +/- 0.5MPa and 14.1 +/- 0.9MPa.m1/2, respectively. The flexural strength of the virgin composite keep stable at 25-1050 degrees C, while dramatically decrease at 1100-1200 degrees C.
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