User Achievements of the Visualized High-Temperature Deformation Analyzer: Ultra-Strong, Elastic, and Fatigue-Resistant SiC Nanowire Networks
2025-04-23
【 User Achievements 】 Ultra-strong, flexible, and fatigue-resistant Silicon carbide Nanowire network
Digital Object Identifier ：10.1111/jace.18263
Xi'an Transportation University Professor Wang Hongjie, School of Materials The team published in the journal « Journal of the American Ceramic Society 》published a paper titled “ Ultrastrong, elastic, and fatigue-resistant SiC nanowire network “of the paper. The study analyzes the novel layered Silicon carbide The ultralight, high-strength, and highly elastic comprehensive performance of nanowire networks.
Research Background
High-porosity ceramics ( HPCs , porosity >90% ) There is an urgent need in strategic sectors such as aerospace, energy conservation, and transportation. 。 Due to the sharp decline in strength with increasing porosity, achieving both high mechanical strength and ultra-high porosity is extremely challenging. 。 Through the careful selection of materials and optimization of structural design, this study successfully fabricated a ceramic material that exhibits both elasticity and high strength.
Research Methods
- Preparation of the material: using flexibility Silicon carbide Using nano-aerogel as the matrix, via hot pressing (1200 °C, 15MPa，2 hour ) Construct a layered structure.
- Under high temperatures L-SiC NN In-situ dimensional changes in air, measured using the Tianjin Zhonghuan visual high-temperature deformation instrument. TA-16A Conduct testing.
- Microstructure: Nanowires via the surface Silicon dioxide Shell layers interacting Connections form an interlayer cross-linking network, with tilted nanowires serving as the interlayer bridges. “Spring” connection.
- Performance characterization:
- High-temperature stability: 1100 Maintains structural integrity at ℃.
- Thermal performance: low thermal conductivity (in the vertical direction) 0.121 W/m · K ), anisotropic thermal conductivity (high in the parallel direction 50% ), suitable for high-temperature insulation.
- Elasticity and Strength: Vertical Compression Strain 20% Fully recovered in time, with stress reaching 5.7 MPa( Superior to existing elastic ceramics 1-2 an order of magnitude ); The Young’s modulus in the parallel direction reaches 238 MPa。
- Fatigue resistance: 10 Stress Retention Rate After 10,000 Compression Cycles 88% , permanent deformation only 2.6% 。
Research Results
This study successfully addressed the strength issue of high-porosity ceramics through layered structural design and hot-pressing processing. - Elasticity-induced paradoxes offer new avenues for developing lightweight, high-performance materials for extreme environments.
Visual High-Temperature Deformation Analyzer ， Optical non-contact measurement is used to quantify the expansion and contraction of materials during the sintering process. During temperature cycling, changes in the material’s shape, dimensions, and phase state are monitored online in real time, and an intelligent data acquisition and image-processing system generates intuitive, accurate data and graphical reports. The product’s performance is on par with international counterparts and ranks among the leading domestic offerings. The visualized high-temperature deformation analyzer is used in materials research and development as well as manufacturing, helping to precisely optimize sintering and heat-treatment processes, thereby improving product quality and reducing production costs.
Contact Information
Address: No. 11 Shuangchuan Road, Tianjin Beichen Science and Technology Park
Muffle Furnace Series
Tube Furnace Series
Drying Oven Series
WeChat Official Account
Customer Service QR Code