TIANJIN, China—Aero Engine Corp. of China (AECC) has produced turbine-engine parts in ceramic matrix composite (CMC), a material that offers low weight and high resistance to temperature. The company displayed the parts—CMC vanes—at the China Helicopter Expo here Oct. 10–13. The vanes were evidently samples from a research program, since they were not identified as belonging to any specific engine. AECC cited a theoretical maximum operating temperature for CMC parts ...

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