ENGINEERS at Aero Engine Corp of China (AECC), the nation’s leading aircraft engine manufacturer, are advancing single-crystal superalloy technologies — one of the most critical materials for modern aeroengines — building on significant progress achieved in recent years.

The research focuses on meeting the demands of next-generation engines, according to Li Jiarong, a senior researcher at the Beijing Institute of Aeronautical Materials, an AECC subsidiary and a key player in engine superalloy production.

“We are developing single-crystal superalloys with enhanced temperature resistance to support future aeroengine requirements,” Li said.

Single-crystal superalloys are an irreplaceable core material for advanced aeroengines. Primarily used in high-pressure turbine blades, they must withstand extreme conditions including ultrahigh temperatures, powerful centrifugal forces, and gas corrosion. Outperforming traditional alloys in heat resistance, creep resistance, and fatigue resistance, these materials directly enhance engine thrust, fuel efficiency, and overall service life.

Li explained that boosting engine efficiency and thrust-to-weight ratio while reducing fuel consumption inevitably raises turbine inlet temperatures. Without sufficient heat resistance, blades become a bottleneck to overall performance. Developing such alloys requires engineers to address conflicting requirements, including high-temperature strength, density, cost, castability, and coating compatibility.

According to Li, alloys for marine use require strong hot corrosion resistance to withstand salt spray, sulfur, and chlorine, and must be designed alongside protective coatings. By contrast, alloys for miniature drones prioritize light weight and low cost, while also adapting to rapid thermal cycling and meeting consistency requirements for small, thin-walled components.(SD-Agencies)