NDLI: Thermal Shock Properties of a 2D-C/SiC Composite Prepared by Chemical Vapor Infiltration

Content Provider	Springer Nature Link
Author	Zhang, Chengyu Wang, Xuanwei Wang, Bo Liu, Yongsheng Han, Dong Qiao, Shengru Guo, Yong
Copyright Year	2012
Abstract	The thermal shock properties of a two-dimensional carbon fiber-reinforced silicon carbide composite with a multilayered self-healing coating (2D-C/SiC) were investigated in air. The composite was prepared by low-pressure chemical vapor infiltration. 2D-C/SiC specimens were thermally shocked for different cycles between 900 and 300 °C. The thermal shock resistance was characterized by residual tensile properties and mass variation. The change of the surface morphology and microstructural evolution of the composite were examined by a scanning electron microscope. In addition, the phase evolution on the surfaces was identified using an X-ray diffractometer. It is found that the composite retains its tensile strength within 20 thermal shock cycles. However, the modulus of 2D-C/SiC decreases gradually with increasing thermal shock cycles. Extensive pullout of fibers on the fractured surface and peeling off of the coating suggest that the damage caused by the thermal shock involves weakening of the bonding strength of coating/composite and fiber/matrix. In addition, the carbon fibers in the near-surface zone were oxidized through the matrix cracks, and the fiber/matrix interfaces delaminated when the composite was subjected to a larger number of thermal shock cycles.
Starting Page	1680
Ending Page	1687
Page Count	8
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	22
Issue Number	6
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2012-12-22
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	C/SiC composite oxidation residual strength thermal shock Characterization and Evaluation of Materials Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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