China pushes superalloy R&D for aircraft engines

People’s Daily Online

By ZHAO LEI (China Daily) 11:20, June 22, 2026

Engineers at Aero Engine Corp of China, the nation’s leading maker of aircraft engines, are working on more advanced single-crystal superalloy technologies, one of the most critical materials for aircraft engines, building on the remarkable progress they have made in recent years.

The engineers are targeting the needs of next-generation engines and working to create more advanced single-crystal superalloy technologies, according to Li Jiarong, a senior researcher at the Beijing Institute of Aeronautical Materials, an AECC subsidiary and a major player in the production of engine superalloys.

“We are working on single-crystal superalloys with better temperature resistance to meet the needs of future aeroengines. We are also developing variants that boast great corrosion resistance and low density, for use in marine environments and miniature drones.

“Moreover, we will work on precision forming technologies for single-crystal turbine blades with more complex structures to sustain the continuous improvement of the blades’ high-temperature resistance,” he told reporters during a recent media tour of the Beijing institute.

Single-crystal superalloys are an irreplaceable core material for advanced aeroengines. Primarily adopted for high-pressure turbine blades, they endure extreme operating conditions including ultrahigh temperatures, powerful centrifugal force and gas corrosion.

Outperforming traditional alloys in heat resistance and anti-creep and anti-fatigue properties, such materials directly lift engine thrust, fuel efficiency and overall service life.

Li said that the institute aims to create superalloys with better temperature resistance in part because boosting engine efficiency and thrust-to-weight ratio while lowering fuel consumption will inevitably drive up turbine inlet temperature, and blades lacking sufficient heat resistance will hold back overall performance.

“When developing such alloys, engineers must tackle a host of conflicting requirements, including high-temperature strength, density, cost, castability and coating compatibility,” the researcher said.

According to Li, alloys for service in marine environments need strong hot corrosion resistance to withstand external corrosion caused by salt spray, sulfur and chlorine. For this reason, they must be designed in tandem with anti-oxidation and anti-corrosion coatings.

By contrast, he said, alloys applied to miniature drones prioritize light weight and low cost. They also need to adapt to rapid thermal cycling and meet consistency requirements for small, thin-walled components.

China has independently developed single-crystal superalloys over the years and has widely used them in new aeroengines, breaking long-term technological monopolies by foreign companies.

“China has made solid progress in independent development and large-scale use of single-crystal superalloys,” Li said. “Overall, we are steadily catching up with the world’s leading countries in this arena and have come close to global advanced levels in some fields.”