Preparation and properties of an oxide fiber‐reinforced silica matrix composite
Source abstract
Abstract
Abstract Oxide (Nextel™ 440) fiber‐reinforced silica composites, with the density and porosity of 1.97 g/cm 3 and 21.8%, were prepared through sol‐gel. Their average flexure strength, elastic modulus, shear strength, and fracture toughness at room temperature were 119.7 MPa, 25.6 GPa, 10.8 MPa, and 4.0 MPa·m 1/2 , respectively. The composites showed typical toughened fracture behavior, and distinct pullout fibers were observed at the fracture surface. Their mechanical properties were performant up to 1000°C, with the maximum flexural strength of 132.2 MP a at 900°C. Moreover, the composites showed good thermal stability, even after thermal aging and thermal shock at elevated temperatures.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · Concrete and Cement Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences Beijing China
Equipment Academy of The Rocket Force Beijing China
Science and Technology on Advanced Ceramic Fibers and Composites Laboratory National University of Defense Technology Changsha China
Funding
National Natural Science Foundation of China · National University of Defense Technology
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