ablator meaning

noun
  A substance or material undergoing ablation, esp the heat shield of a spacecraft

Examples

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1. The heat shield is made of phenolic impregnated carbon ablator ( PICA ).
2. After extensive study, NASA has selected the Avcoat ablator system for the Orion crew module.
3. However, these systems still require an ablator, and the accuracy and geometrical considerations are even more important.
4. The ablator itself is a unique blend of g " ) of acceleration on the lander and rover.
5. The report goes on to suggest that using a thicker ablator may improve performance, but this increases its inertia.