Thermal‐Shock Fracture and Damage Resistance Improved by Whisker Reinforcement in Alumina Matrix Composite
Source abstract
Abstract
Fracture resistance of SiC‐whiskers‐reinforced Al 2 O 3 ‐matrix composite under thermal shock was examined. Equibiaxial tensile thermal stress in the composite was significantly reduced before fracture, because the whiskers made percolation paths that increase heat flux and thereby reduced the temperature gradient. The thermal‐shock fracture resistance ( R ′) of the composite is thus much higher than that of monolithic Al 2 O 3 . Thermal‐shock damage resistance ( R ″″) was estimated from the thermal‐shock stress when a surface crack propagates. R ″″ of the composite is also much higher than that of monolithic Al 2 O 3 owing to an increment of work‐of‐fracture due to crack‐face bridging of the whiskers.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · High-Velocity Impact and Material Behavior · Aluminum Alloys Composites Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Course of Advanced Technology Fusion Graduate School of Science and Engineering Saga University 1 Honjo‐machi Saga 840‐8502 Japan
Secure Materials Center Materials and Structures Laboratory Tokyo Institute of Technology 4259 Nagatsuta Midori Yokohama 226‐8503 Japan
Department of Mechanical Engineering Tokyo Metropolitan University 1‐12‐1 Minami‐osawa Hachioji Tokyo 192‐0397 Japan
Funding
Collaborative Research Projects of Materials and Structures Laboratory of Tokyo Institute of Technology
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