Kejia vacuum furnace assists national scientific research - sintering test by simulating the vacuum
Time：2024-09-05
At present, my country is comprehensively promoting the fourth phase of the lunar exploration project, including the Chang'e 6, Chang'e 7 and Chang'e 8 missions. The main goal is to build a basic lunar scientific research station, conduct lunar environmental detection and resource utilization test verification, etc. The implementation of these tasks will further promote the development of my country's aerospace technology and deepen human understanding of the moon. On June 25 this year, the Chang'e 6 mission was a complete success, achieving the world's first lunar back sampling return. In the future, a basic scientific research station will be built at the South Pole of the Moon.
Since 2015, Huazhong University of Science and Technology has taken the lead in starting related research work in China. Let's visit the frontier
Professor from the National Digital Construction Technology Innovation Center and Huazhong University of Science and Technology said: The materials used to build a scientific research station on the moon are the current problems that need to be solved. The less materials used, the better, so that its weight is lighter, and its strength needs to be further improved. The relevant results have just been published in a top international journal, which has helped us find a good configuration that can adapt to the extreme environment of the moon to do some research work.
Academician Ding Lieyun of Huazhong University of Science and Technology explained the manufacturing of lunar bricks in the "First Lesson of School"
Where do "lunar soil bricks" come from? How to make them?
"If we want to build a house on the moon, a very important step is that we must first have materials. The moon is lunar soil. How can lunar soil be sintered into bricks? In the laboratory, we saw that some R&D personnel were testing how to sinter lunar soil bricks.
School of Civil and Water Conservancy Engineering, Huazhong University of Science and Technology: We mainly use a vacuum sintering method to sinter simulated lunar soil. The graphite mold we use has a cavity with a diameter of 18 mm. We first fill the simulated lunar soil powder inside, compact it with a graphite pressure head, and then assemble it as a whole; then put it together with the graphite mold into a vacuum sintering furnace for sintering. The vacuum degree of this sintering furnace can reach 10 to the negative square Pa, it mainly uses silicon-molybdenum heating rods, which can generate heat after power is turned on. We put simulated lunar soil and graphite inside the furnace, and the heat can heat the materials through thermal radiation after vacuuming.
Use Kejia vacuum sintering furnace to burn the materials to more than 100 MPa
Use vacuum furnace to simulate the lunar environment on Earth, and the hardness of fired lunar soil bricks is much higher than that of concrete
It is a key technical exploration to simulate the vacuum environment of the moon on Earth for sintering tests. Through specific equipment and processes, conditions close to the vacuum state of the moon are created, and materials used for construction, such as lunar bricks, are fired in this environment. The key lies in the precise control of environmental parameters, including air pressure, temperature, etc. During the firing process of about 24 hours, the temperature change curve needs to be carefully designed according to the material properties and the actual environmental requirements of the moon to ensure that the fired lunar bricks have the required physical and chemical properties.
Moon soil bricks with mortise and tenon structures made by vacuum sintering and 3D printing technology
The significance of simulated vacuum sintering technology
Adapting to the needs of lunar construction: There is a lack of conventional building materials and suitable construction environment on the moon. Using local lunar resources (such as lunar soil, etc.) to burn lunar bricks is an important way to achieve the construction of a lunar base. This vacuum sintering technology can provide a reliable building material solution for the large-scale construction of infrastructure on the moon in the future.
Reducing transportation costs: It is extremely expensive and unrealistic to transport large amounts of building materials from the earth to the moon. By using local materials and mastering vacuum sintering technology, we can greatly reduce our dependence on earth resources and reduce the cost and difficulty of lunar construction.
Promoting scientific research: Researching the vacuum sintering process not only helps to understand the physical and chemical changes of materials in extreme environments, but also provides reference and reference for space exploration and resource utilization in other fields.
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