In-situ tensile damage and fracture behavior of PIP SiC/SiC minicomposites at room temperature. Issue 14 (November 2021)

• Record Type: Journal Article
• Authors: Yang, Haitang; Xu, Shenwei; Zhang, Daxu; Li, Longbiao; Huang, Xiaozhong
• Is Part Of: Journal of the European Ceramic Society. Volume 41:Issue 14(2021)
• Page Start: 6869
• Page End: 6882
• Publication Date: 2021-11
• Subjects: Ceramic-matrix composites (CMCs) -- Minicomposite -- In-situ -- Matrix fragmentation -- Interface debonding -- Fiber pullout; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2021.06.050
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: In-situ tensile damage and fracture behavior of original SiC fiber bundles, processed and uncoated SiC fiber bundles, SiC fiber bundle with PyC interphase, SiC/SiC minicomposites without/with PyC interphase are analyzed. Relationships between load-displacement curves, stress-strain curves, and micro damage mechanisms are established. A micromechanical approach is developed to predict the stress-strain curves of SiC/SiC minicomposites for different damage stages. Experimental tensile stress-strain curves of two different SiC fiber reinforced SiC matrix without/with interphase are predicted. Evolution of composite's tangent modulus, interface debonding fraction, and broken fiber fraction with increasing applied stress is analyzed. For the BX™ and Cansas-3303™ SiC/SiC minicomposite with interphase, the composite's tangent modulus decreased with applied stress especially approaching tensile fracture; the interface debonding fraction increased with applied stress, and the composite's tensile fracture occurred with partial interface debonding; and the broken fiber fraction increased with applied stress, and most of fiber's failure occurred approaching final tensile fracture.