Chinese Academy of Sciences team completes in-orbit metal 3D printing demo on Qingzhou test spacecraft

A research team from the Institute of Mechanics, Chinese Academy of Sciences (CAS), in collaboration with the CAS Innovation Academy for Microsatellites, has successfully completed an in-orbit demonstration of metal additive manufacturing aboard the Qingzhou test spacecraft. The payload, developed by the Institute of Mechanics, used a laser-wire directed energy deposition (DED) process to perform metal melt deposition in microgravity, executing multiple remote start-stop cycles with stable process control. The mission validated payload-spacecraft platform compatibility, fully automated workflow execution, data and image transmission, and the core laser-wire DED process under actual space conditions. The demonstration marks China's first systematic in-orbit verification of key metal AM technologies for space applications.

This achievement places China alongside a small group of nations — primarily the U.S. and Russia — that have demonstrated metal AM in orbit. The technical challenge is significant: microgravity alters melt-pool dynamics, droplet transfer, and liquid-bridge stability compared to terrestrial DED, and the payload must survive launch vibration, operate within tight power and telemetry constraints, and execute autonomously. The laser-wire DED approach chosen here is well-suited for in-space manufacturing because wire feedstock is denser than powder, easier to handle in zero-G, and avoids powder containment and contamination issues. The team's stated next steps — longer-duration tests under more complex conditions, and development of a technical standards framework — align with the aerospace qualification grind pattern: a multi-year progression from demonstration to certified operational capability. The broader strategic goal is to shift from 'bring what you need' to 'make what you need' for orbital servicing, spare-part fabrication, structural repair, and deep-space mission self-sufficiency.

From a practical standpoint, this is a successful engineering demonstration, not yet an operational capability. The team must now demonstrate repeatability over longer missions, prove material properties under thermal cycling and radiation, and integrate the process into a standardized in-space manufacturing workflow. For the global AM industry, the event confirms that laser-wire DED is the leading candidate for in-space metal fabrication, and that Chinese research institutions are now at parity with Western counterparts in this specific technology demonstration. The real test will be whether this translates into a sustained orbital manufacturing program with qualified parts and a clear mission pull.