CCTV made a major news on January 2 this year. The report mentioned that the Yangtze River 1000 engine on the C919 passenger plane has made a major breakthrough. With the birth of the Yangtze River 1000 engine, whether a technological breakthrough can be achieved to break the blockade? What kind of major breakthrough did you make?

In 2020, my country has made a series of major progress in scientific and technological innovation, and during the 14th Five-Year Plan period, my country will also implement a number of forward-looking and strategic national major scientific and technological projects.

The titanium alloy research team in the laboratory of the Institute of metal Research of the Chinese Academy of Sciences is preparing a new type of engine turbine blade.

Researcher: "Aero engines are the heart of the aircraft. The most difficult part of the engine is the blades. In order to reduce the weight of the blades, we use titanium-aluminum blades, which have a density of only 4.0, to replac the heavier nickel-based superalloys. The specific gravity is twice that of 8. If this is done, the turbine blades and disks of the aircraft engine can be greatly reduced in weight, and the efficiency of the aircraft can be greatly improved."

Titanium is very active and easily reacts with other materials. only yttrium oxide, a ceramic material, can be used as a casting container.

But its surface is powdery, it is easy to fall off the slag, pollute the titanium-aluminum solution, resulting in insufficient blade accuracy. Scientists in different research fields have spent a full ten years, and after countless failures, they finally formulated a special bond. To prevent the yttrium oxide from dropping slag, solve the problem of the blade container, and realize the integral casting molding. It is necessary to ensure that the performance of each blade can be used safely.

On the engine of the C919 large aircraft, scientific researchers also have to face a series of challenges.

Researcher: "This size has a great impact on the efficiency of this engine. There may be hundreds of sizes on the engine blades. We must ensure that each size needs to meet the requirements. This process control management is also very important."

Recently, my country's new aero-engine blade project has settled in Taicang High-tech Zone, Jiangsu. The preparation and production of titanium-aluminum alloy blades is also progressing in an orderly manner. At present, the titanium-aluminum alloy blades have passed the vibration fatigue assessment, and the overall effect has reached the desired expectations. The next step will be the assessment of blade installation

Researchers "The CJ1000 engine is progressing very fast. We know that the CJ2000 is also stepping up its research. Our country hopes to make the CJ1000 and CJ2000 engines as soon as possible, and can use our own engines to support our large aircraft C919 and even C929."