Innovation Discussed Podcast – Episode 12 (2025)
Hosts: Mark Daniels, Dr. Aphrodite Tomou, and Adam Sells
Protecting Ourselves in Space - Materials Science and the Challenge of Orbital Debris
In this latest episode of Innovation Discussed, we quite literally look to the skies as we explore one of the most urgent and fascinating challenges in materials science: how to protect spacecraft and satellites from orbital debris.
Mark opens the episode with a review of the live episode at the Advanced Materials Show and an outline of events Goodfellow is attending over the coming months, while Dr Aphrodite Tomou brings her expertise in advanced characterisation techniques and Adam Sells offers practical insights into current and emerging material technologies.
Together, they unpack the science behind impact shielding and explore new developments in materials designed for the extreme conditions of space.
Highlights from the episode:
Understanding MMOD
Micrometeoroids and orbital debris may be tiny, but their speed and density make them extremely hazardous. Travelling at up to 20 kilometres per second, these particles can cause serious damage to spacecraft and mission-critical systems.
Materials That Make a Difference
The episode covers traditional materials such as aluminium and titanium alloys, alongside composites like Kevlar, foams, mesh structures and multi-layered Whipple shields. The focus is on achieving maximum protection with minimum weight.
The Role of Design and Additive Manufacturing
Material choice alone is not enough. Additive manufacturing enables the creation of complex geometries that can improve shielding performance while reducing mass, making it a key tool in space engineering.
Towards Self-Healing Structures
The team discusses emerging research into self-healing composites, which can repair microfractures before they lead to major failures. These innovations have the potential to extend the operational lifespan of satellites and other orbital systems.
Looking Beyond Protection
Protecting spacecraft is only part of the challenge. The episode also covers approaches to debris mitigation, including robotic arms, tethers and laser ablation, as well as the importance of international collaboration to monitor and reduce the amount of debris in orbit.
