Breakthrough in high temperature resistant material technology boosts the development of aircraft
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2019-07-10
Researchers at the University of California (USC) have been working on high temperature resistant materials and are close to success. Once the material is successfully developed, it can be widely used in aerospace, machine building and engineering.
Researchers at the University of California (USC) have been working on high temperature resistant materials and are close to success. Once the material is successfully developed, it can be widely used in aerospace, machine building and engineering.
Most materials expand when heated, posing challenges for engineering applications. Large structures such as bridges and buildings must have joints that allow expansion, allowing the structure to expand safely.
Companies like BAE, Boeing and Lockheed Martin have to address thermodynamics in their work on hypersonic vehicles like the HTV-2.
Cracks or fractures occur when parts made of different materials expand at different rates when heated, as is common in other large buildings.
The University of Southern California has designed a fabrication process for making 3D printed structures from different materials.
First, the materials were "printed" in a liquid state and then cured by ultraviolet light. The design team used the process to print an object with an internal lattice structure formed by multiple rods arranged at specific angles.
When the object is heated, its constituent materials expand at different rates of expansion, but these expansions move the rods in, and the end result is that the object appears to shrink, not expand.
The design team hopes to use different materials and different lattice arrangements to customize expansion and shrinkage rates, and even create zero-expansion materials, then those bridges and buildings will be safer, and more importantly, the technology can be applied to hypersonic vehicles Structural design.
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