Shulou(Shulou.com)11/24 Report--

CTOnews.com August 20 news, single crystal superalloy is the key material for the preparation of aero-engine and gas turbine blades, and it is an important research content in the field of metal materials research.

In order to further explore this excellent alloy material, China sent two samples of silicon-aluminum alloy to the space station in 2022, one of which returned to the ground with Shenzhou 15 after completing the directional solidification experiment at the space station.

According to CCTV, researchers at the Institute of Metals of the Chinese Academy of Sciences have begun a preliminary anatomical analysis of the Al-Si alloy samples brought back by the Shenzhou 15 astronauts from space. (CTOnews.com Note: the control group with ground gravity conditions, the role of gravity in the solidification process can be found by comparing the two phases.

According to Luo Xinghong, a researcher at the Institute of Metals, Chinese Academy of Sciences, the solidification process of Al-Si alloy is similar to that of single crystal superalloy to a certain extent, and there are some defects in the preparation process, such as porosity, composition segregation and so on. all these are closely related to the buoyancy convection caused by gravity.

The comparative experiment of alloy directional solidification carried out by researchers is to reveal the specific role and related mechanism of gravity in the solidification process of single crystal alloy, and to explore ways to solve the problem of alloy solidification defects. these materials can play an important role in different application scenarios such as gas turbine or aero-engine blades in the future.

He said that if we can figure out how gravity acts on the structure in the alloy and the composition distribution in the whole sample, we can make use of the effect of gravity or overcome some shortcomings of gravity to prepare better materials.

It is worth mentioning that the experiment on the Chinese space station is only in the first stage, and we will use different alloy materials to carry out the second phase of the experiment in the future.

In addition to the directional solidification experiment of Al-Si alloy, researchers also plan to use other experimental methods and different alloy materials to carry out related experimental work.

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