Aluminium nitride (AlN) heat exchanger coupons developed with LCM technology play a pivotal role in the thermodynamics-driven control management of hydrogen-powered and electrified propulsion for aviation.
TRIATHLON’s aim is to overcome the challenges associated with scaling-up hydrogen powertrain technology to megawatt-class aircraft.
LCM-printed ceramic heat exchangers contribute to eliminating the need for cryogenic hydrogen pumps, significantly improving system efficiency and sustainability in aviation, while reducing maintenance and saving hundreds of thousands of euros in costs.
TRIATHLON project (NO 101138960) is a landmark initiative funded by the European Union’s Horizon Europe Research and Innovation Action (RIA) programme, coordinated by TU Delft and M2i and backed by a strong consortium spanning six countries.
10th September 2025: Vienna, Austria. As part of the TRIATHLON project consortium, Lithoz is developing and manufacturing a 3D-printed ceramic heat exchanger (HEX) made from aluminium nitride (AIN) for hydrogen-electric propulsion systems for aircraft in the megawatt class. AlN HEXs are a technology enabler for future hydrogen-powered powertrains that will help decarbonizing aviation, improving system efficiency and sustainability in aviation, while reducing maintenance and saving hundreds of thousands of euros in costs.
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Designed by Ergon Research, this innovative application is based on thermodynamics-driven control management. It leverages the precision and scalability of Lithoz‘s LCM (Lithography-based Ceramic Manufacturing) CeraFab System printers and materials. Unlike traditional heat exchangers, TRIATHLON’s ceramic-based solutions eliminate the need for energy-intensive cryogenic hydrogen pumps. AIN is the perfect material for addressing the thermal management of these high-performance components due to its excellent thermal expansion coefficient and conductivity (211 W/mK). This dramatically increases thermal efficiency and enables compact, lightweight system architecture, which is crucial for electrified aviation.
Lithoz’ advanced ceramics are already proven in the aerospace industry and other high-stress sectors. LCM printed high-performance materials such as AIN, with its excellent thermal and mechanical resistance as well as < 600°C stable behaviour against hydrogen, enable unmatched precision, a high surface-area design and superior thermal conductivity – all of which are crucial for next-generation hydrogen-electric systems. Lithoz’ LCM technology offers unique design freedom, enabling the creation of ultra-precise, complex internal channels and geometry-optimised parts that ensure maximum heat exchange in minimal space.
Dr. Johannes Homa, CEO of Lithoz, commented on the project’s success so far: “This is a breakthrough application of our ceramic 3D printing technology in a completely new field. Aerospace and sustainability are key growth areas for Lithoz, so achieving serial production with aluminium nitride is a significant milestone for these sectors. This material opens up design and application possibilities that no one else can currently realise, making a decisive contribution to a greener future in aviation through ceramic AM.”
TRIATHLON is a project (No 101138960) funded by the European Union’s Horizon Europe Research and Innovation Action (RIA) programme, coordinated by Stichting Materials innovation institute (M2i) and Delft University of Technology (TU Delft). The project brings together universities, industrial designers, technologies suppliers into the same consortium to unite skills towards the development of disruptive approaches to design more robust, low-maintenance, low-emission, and highly responsive hydrogen-electric powertrains for megawatt class aircraft.
Contact: https://triathlon-project.eu/
Lithoz is the world and technology leader for high-performance ceramic materials and 3D printers. Founded in 2011, Lithoz is committed to breaking the boundaries of ceramic production and supporting customers in expanding the manufacturing opportunities for the ceramic industry. The company has an export share of almost 100%, almost 150 employees and 4 different sites worldwide. Since 2016, Lithoz has been ISO 9001-2015 certified. In 2025, Lithoz secured ISO 13485 certification to qualify their quality management system to the standards of the medical devices industry.
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