| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
| Presentation Title |
Making Pre-stressed Ceramics with High Strength and High Damage Tolerance |
| Author(s) |
Yiwang Bao, Fenghua Kuang, Yi Sun, Yueming Li, Detian Wan, Zongyang Shen, Delong Ma, Lingfeng He |
| On-Site Speaker (Planned) |
Lingfeng He |
| Abstract Scope |
High strength and high damage-tolerance are critical for the reliability and durability of ceramic components. In the past decades, various strengthening mechanisms or processes, such as dispersion strengthening, minimizing grain size and porosity, reduction of crystal anisotropy and localized stresses, functionally grading glass/ceramic/glass structures, introduction of compressive stress in the surface layer by quenching or laser shock etc., have been proposed to enhance the mechanical properties of ceramics and obtained great achievements. However, large-scale and economical fabrication technology is still a goal for applications. We propose a simple method to prepare pre-stressed ceramics with high strength and high damage tolerance. Residual surface compressive stress is generated in ceramic components by pressureless sintering of a green bulk coated with a thin layer of low coefficient of thermal expansion. This method is simple and economical and has potential for reinforcement of structural ceramics, building ceramics, refractories, and bioceramics. |