Enhanced fracture properties of ZrB 2 -based composites by in-situ grown SiC nanowires
Source abstract
Abstract
To improve the fracture properties of ZrB2-based composites, SiC nanowires (SiCnw) were introduced into the powder mixtures via an in-situ growth method and the composites were fabricated by hot pressing. Microstructure observations found that the SiCnw with a diameter of less than 100 nm presented twisted morphology and homogeneously distributed among ceramic particles. It was also found that the SiCnw could inhibit the grain growth of ZrB2-based composites. Compared to that of composites without SiCnw, the fracture toughness and the work of fracture for the composites with SiCnw were 7.17 MPa m1/2 and 205 J m−2, which increased by 61.1% and 91.6%, respectively. The main enhancing mechanisms could be associated with the obvious crack deflection, crack branching and pull out of SiCnw. The SiCnw could refrain the crack opening and reduce the stress intensity in front of crack tips, which absorbed more energy and improved the fracture properties.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Structural Analyses for Industrial Equipment, Dalian University of Technology, Dalian, People’s Republic of China
Funding
Research Fund of China Postdoctoral Science Foundation · Aviation Science Foundation of China
References (33)
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