Silicon-Carbide Composite Container Closure With Thermal Expansion Buffer
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Solution Overview
Problem
Long-fiber-reinforced silicon-carbide composite materials used for containers are prone to cracking due to temperature changes during manufacturing or use, particularly when a solid member like an end plug is bonded to a fuel cladding tube with a small thickness.
Innovation Solution
A container body formed of long-fiber-reinforced silicon-carbide composite material with a specific thickness range and a lid made of silicon carbide, using an intermediate material to seal and bond the joint, and optimizing the fiber arrangement to prevent direct contact with the contents, enhancing fracture toughness and resistance to temperature changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a solid member such as an end plug is bonded to a fuel cladding tube with a small thickness, then the opening is closed and structural integrity is achieved, but the end plug is easily cracked due to temperature change during manufacture or use
Solution Approach 1:
The patent changes the thickness parameter of the lid (end plug) to be within 1 to 3 times the thickness of the container body wall. This parameter optimization ensures that the lid has sufficient structural integrity to close the opening while maintaining thermal expansion compatibility with the container body, preventing cracks during temperature changes
Solution Approach 2:
The patent introduces an intermediate material layer between the lid and the container body at the bonding interface. This intermediary layer acts as a buffer that accommodates differential thermal expansion between the lid and container body during temperature changes, preventing stress concentration and cracking while maintaining structural integrity
Data Source
AI summary
A container comprising: a container body that includes a wall portion separating inside and outside and is formed of a long-fiber-reinforced silicon-carbide composite material obtained by combining monofilaments of silicon carbide with a silicon carbide matrix, the wall portion having a thickness equal to a specific dimension; and a lid configured to close an opening of the container body, formed of a material containing at least silicon carbide, and equipped with such a wall portion separating inside and outside that thickness is within a range of 1 to 3 times the specific dimension.