Damage assessment of alumina fibre-reinforced mullite ceramic matrix composites subjected to cyclic fatigue at ambient and elevated temperatures

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@article{c212aea3b86d4aa1a29d38f6d44d7c2f,
title = "Damage assessment of alumina fibre-reinforced mullite ceramic matrix composites subjected to cyclic fatigue at ambient and elevated temperatures",
abstract = "The damage evaluation behaviour of alumina fibre-reinforced mullite ceramic matrix composites subjected to cyclic fatigue was investigated by means of acoustic emission (AE) monitoring and forced resonance techniques. AE technique provided sufficient information about the damage initiation and progression in real time whilst the forced resonance, (FR) technique allowed the detection of changes in elastic modulus (E) and internal friction (Q(-1)) that occurred with increasing number of cyclic fatigue at room temperature. From the two non-destructive detection techniques results combined with microstructural observations, it is concluded that the composite cyclic fatigue damage evolution begins with multiple crack formation within the matrix and is followed by delamination (interfacial failure). Final failure of the composite is caused by fibre fracture and extensive cyclic sliding along the fibre/matrix interface. The strong bonding between mullite matrix and alumina fibre caused by the glassy phase within the mullite matrix determined the fatigue performance of the composite at 1350degreesC. Regions with glassy phase failed catastrophically as a result of early fibre fracture. (C) 2002 Elsevier Science Ltd. All rights reserved.",
keywords = "internal friction, acoustic emission, damage assessment, mullite, Al2O3-fibres, fatigue, composites",
author = "Cengiz Kaya and Figen Kaya and H Mori",
year = "2002",
month = apr,
day = "1",
doi = "10.1016/S0955-2219(01)00320-X",
language = "English",
volume = "22",
pages = "447--452",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier",
number = "4",

}

RIS

TY - JOUR

T1 - Damage assessment of alumina fibre-reinforced mullite ceramic matrix composites subjected to cyclic fatigue at ambient and elevated temperatures

AU - Kaya, Cengiz

AU - Kaya, Figen

AU - Mori, H

PY - 2002/4/1

Y1 - 2002/4/1

N2 - The damage evaluation behaviour of alumina fibre-reinforced mullite ceramic matrix composites subjected to cyclic fatigue was investigated by means of acoustic emission (AE) monitoring and forced resonance techniques. AE technique provided sufficient information about the damage initiation and progression in real time whilst the forced resonance, (FR) technique allowed the detection of changes in elastic modulus (E) and internal friction (Q(-1)) that occurred with increasing number of cyclic fatigue at room temperature. From the two non-destructive detection techniques results combined with microstructural observations, it is concluded that the composite cyclic fatigue damage evolution begins with multiple crack formation within the matrix and is followed by delamination (interfacial failure). Final failure of the composite is caused by fibre fracture and extensive cyclic sliding along the fibre/matrix interface. The strong bonding between mullite matrix and alumina fibre caused by the glassy phase within the mullite matrix determined the fatigue performance of the composite at 1350degreesC. Regions with glassy phase failed catastrophically as a result of early fibre fracture. (C) 2002 Elsevier Science Ltd. All rights reserved.

AB - The damage evaluation behaviour of alumina fibre-reinforced mullite ceramic matrix composites subjected to cyclic fatigue was investigated by means of acoustic emission (AE) monitoring and forced resonance techniques. AE technique provided sufficient information about the damage initiation and progression in real time whilst the forced resonance, (FR) technique allowed the detection of changes in elastic modulus (E) and internal friction (Q(-1)) that occurred with increasing number of cyclic fatigue at room temperature. From the two non-destructive detection techniques results combined with microstructural observations, it is concluded that the composite cyclic fatigue damage evolution begins with multiple crack formation within the matrix and is followed by delamination (interfacial failure). Final failure of the composite is caused by fibre fracture and extensive cyclic sliding along the fibre/matrix interface. The strong bonding between mullite matrix and alumina fibre caused by the glassy phase within the mullite matrix determined the fatigue performance of the composite at 1350degreesC. Regions with glassy phase failed catastrophically as a result of early fibre fracture. (C) 2002 Elsevier Science Ltd. All rights reserved.

KW - internal friction

KW - acoustic emission

KW - damage assessment

KW - mullite

KW - Al2O3-fibres

KW - fatigue

KW - composites

UR - http://www.scopus.com/inward/record.url?scp=0036532802&partnerID=8YFLogxK

U2 - 10.1016/S0955-2219(01)00320-X

DO - 10.1016/S0955-2219(01)00320-X

M3 - Article

VL - 22

SP - 447

EP - 452

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 4

ER -