Ceramics breakthrough drives onshore next-gen engine component builds

A ceramic matrix composite (CMC) aerofoil demonstrator has been produced and precision-finished by an engineering consortium, establishing advanced high-temperature manufacturing capability across aerospace, nuclear and defence sectors.

Coating specialist Archer Technicoat Limited (ATL) collaborated with two centres of the High Value Manufacturing (HVM) Catapult, the University of Sheffield Advanced Manufacturing Research Centre (AMRC) and the Manufacturing Technology Centre (MTC), to develop and manufacture the demonstrator.

Modern aerospace engines must run hotter to maximise fuel efficiency, cut carbon emissions and squeeze maximum power out of every fuel drop. While traditional nickel-based superalloys cap out around 1,000°C, silicon carbide CMCs operate at temperatures reaching around 1650C and greatly reduce the need for cooling systems that current engines rely on.

Driven by industry demand to de-risk these extreme-temperature materials for functional use, the consortium validated the UK's CMC production capability through a high-value aerofoil demonstrator, a specialised, curved blade component that manages engine airflow.

Daniel Whitehead, senior technical fellow at the AMRC, said: "Developing a revolutionary material is a huge achievement; but figuring out how to machine functional components from these emerging materials without damage is still a significant challenge.

"This project is about self-reliance and putting the UK at the forefront of advanced high-temperature manufacturing. By combining domestic material specialisms with advanced machining R&D in an open, collaborative space, we've proved that we can produce these next-generation technologies - securing a resilient supply chain and developing the tools to build a cleaner, decarbonised future."

The project successfully grew the capability to technology readiness level (TRL) 5 for domestic shop floors, validating a complete, three-stage manufacturing route,

– Material synthesis: ATL transformed woven silicon carbide fibres into a solid structural aerofoil using chemical vapour infiltration (CVI) and a specialised graphite mould developed in collaboration with the German Aerospace Center (DLR).

– High-speed trimming: MTC's laser processing centre of excellence pioneered the use of laser cutting to rapidly trim surplus composite material without tool wear

– Precision finishing: The AMRC deployed advanced CNC abrasive grinding and metrological modelling to finish curved aerodynamic surfaces for laminar airflow, while utilising small-diameter core drills to precision-machine intricate fastening features without causing structural failure in the brittle ceramic.

Calvin Prentice, technical director at Archer Technicoat Limited (ATL), said: "It's been great to combine our unique CVI processing and CMC prototyping skills with advanced machining capabilities in the UK supply chain in order to produce components capable of handling extreme thermo-mechanical environments."

Bethan Smith, head of laser processing at MTC, said: "As manufacturers look to boost productivity, resilience and future capability, innovative production methods will be critical to high-value sectors like aerospace. Through our collaboration with ATL and our sister Catapult centre, we are paving the way to make vital aircraft components from next-generation materials using laser-processing. By doing so, we can enable UK manufacturers to meet future customer demand, grow their businesses and compete on the global stage."

Born out of the AMRC's collaborative research enterprise framework, the project also proved that high-speed laser sectioning and precision grinding can operate as complementary production processes, establishing a benchmark for future commercial production lines.