Great Country Academician

Qin Anguo left with the answer, and Academician Zhang Pingxiang stayed, preparing to participate in the optimization of high-temperature copper-carbon-silver composite superconducting materials at the Chuanhai Materials Research Institute.

A senior academician, who is also a founder-level leader in the field of superconducting materials, joined the institute, which made the research institute a lot more active.

Some researchers who are more courageous and academically motivated, after knowing the identity of this big boss, began to ask questions.

For Zhang Pingxiang, as long as it is related to superconducting materials, he will not refuse anyone. This is a true scholar who is obsessed with the field of superconducting materials and has a heart that is always climbing upwards.

Of course, under normal circumstances, Xu Chuan would not refuse when a researcher in the laboratory asked Xu Chuan to exchange questions.

But most of the time, he is not in the lab.

As Fan Pengyue said, this is a hands-off shopkeeper. Whenever you think of it or need it, just come and have a good luck, and leave when you run out.

So the researchers in the laboratory wanted to ask Xu Chuan for advice, but most of the time they couldn't find anyone.

Now that there is a new boss, if you don't seize the opportunity, you will miss it and regret it.

Academician Zhang Pingxiang voluntarily asked to stay to study and optimize copper-carbon-silver composite materials. Although Xu Chuan could treat him as an ordinary researcher in the laboratory, how could Xu Chuan make such an arrangement.

For a master at the academician level, the cost of business trips can no longer be calculated with money.

Fortunately, Fan Pengyue has sufficient experience in dealing with such matters. He followed Chen Zhengping during his Ph.D. and basically handled such matters.

As for Xu Chuan, he didn't care about that.

After academician Zhang Pingxiang came, he almost lived in the research institute. The two kept exchanging ideas and opinions in the laboratory to find a route to optimize the physical properties of high-temperature copper-carbon-silver composite superconducting materials.

"How about doping some zirconia through nanotechnology? Zirconia itself is a superconducting material at ultra-low temperatures. Its superconducting principle comes from the twisted crystal structure. In theory, it should be very suitable for copper carbon like you." silver material."

In the laboratory, Academician Zhang Pingxiang looked at the data on the computer screen, thought for a while, and then said.

Xu Chuan thought for a while, and said, "You can try it, but I don't think there is much hope. It's a pity that the mechanism data of zirconia has not been entered into the material model, and it is impossible to do a simulation through the model."

In recent days, he has been communicating with Zhang Pingxiang how to change the brittleness of copper-carbon-silver composite materials.

Compared with metals, brittleness and difficulty in deformation are major characteristics of ceramics. In order to improve the brittleness and toughness of ceramics, it is generally used to reduce the grain size and make it submicron or nanometerized to improve plasticity and toughness.

Or take effective ways to improve it, such as doping zirconia toughening, phase transformation toughening, fiber toughening or particle in-situ growth enhancement.

However, these methods are fine when applied to other ceramic materials, but it is difficult to apply them to superconducting materials.

Because the superconducting mechanism of high-temperature superconducting materials itself comes from the strong correlation effect between electrons and electrons. If doping other materials or changing the grain size and structure, it is likely to directly lead to the failure or reduction of superconductivity.

If the reduction is not large, it is still acceptable. But judging from his current data, the degree of reduction in this rate may be quite high.

Hearing this, Zhang Pingxiang asked with interest: "If your model can be perfected, it may completely subvert the research methods in the material world, but it is very difficult to do so."

"And as more and more mechanical data of materials are added, the size of the model will become larger and larger. The existing supercomputers may not be able to carry this model soon, and perhaps quantum computers are its way back."

In the past few days, in the Chuanhai Materials Research Institute, he not only exchanged a lot of knowledge about superconducting materials with the person in front of him, but also saw the real 'big killer'.

Although the role of the model in front of him is still extremely limited, it has opened up a new path in the field of material research.

In the previous material research process, research on a new material was generally based on experience.

Although computer simulation can also play a certain auxiliary role in this process, such as using computer simulation technology to predict and analyze the properties and behavior of materials.

This link includes theoretical calculation, molecular dynamics simulation and finite element analysis and so on. But in fact, the accuracy of the simulated results is not very high, and its role in the entire material research process is still quite limited.

However, the model in Chuanhai Materials Research Institute is different. It is deduced from the source based on the mechanism of the material, and can directly simulate the entire synthesis process with the help of computers and models.

To be honest, when it comes to materials, almost everyone wants to do this kind of thing, but no one can do it.

Because of insufficient mathematical knowledge, it is too difficult to establish a mathematical model for material research from the mechanism of materials.

This is the one in front of me who has this ability and this mind.

Xu Chuan said with a smile: "Let's worry about this later, at least for now it can provide us with a lot of help."

After a pause, he continued: "As for the doping of zirconia, we can arrange researchers to do an experiment to see how it works."

Zhang Pingxiang said: "I'll do this experiment myself. To be honest, I'm quite optimistic about it."

These days, he had a lot of exchanges with the young scholar in front of him. After seeing his extensive knowledge in materials science, he also had some comparative thoughts in his heart.

After all, at his level, it can be said that he is standing at the top of the pyramid in the field of superconducting materials.

As the saying goes, Wen Wu is the first, and Wu Wu is the second. He also wants to try to see whether he, who has been immersed in the field of superconducting materials for decades, is stronger, or the young man in front of him who broke the record of high-temperature superconducting materials is stronger.

Hearing this, Xu Chuan smiled and didn't pay much attention. It is normal for those engaged in scientific research to have a heart that refuses to admit defeat.

"It's all right, take your time, don't rush, if you want to retain the superconducting properties and at the same time change some of its physical properties, the difficulty is no less than developing a new high-temperature superconducting material."

Zhang Pingxiang nodded and said, "It's okay. I came here to make a breakthrough in the field of high-temperature superconducting materials. As long as there is hope, you can try it."

After thinking for a while, he asked again: "If the zirconia doping effect is not effective, do you have any other ideas?"

Hearing this, Xu Chuan thought for a while, and said, "If you want to talk about ideas, we have been studying this these days, so it is impossible to say that there is no such thing. Compared with doping, I may be more optimistic about the coating."

Zhang Pingxiang thought for a while, then frowned slightly and said: "In the process of general ion plating reaction deposition of hard coatings, there are often molten droplets, and these molten droplets exist in the coating in the form of metal phases, which are very important for releasing the internal stress of the coating. It has a certain effect on improving the toughness of the phase."

"However, the size of the metal phase of the molten droplets is large (in the order of microns) and randomly distributed (without uniform distribution), which not only reduces the hardness of the coating but also significantly reduces the corrosion resistance and oxidation resistance, so it is not hard and superhard coatings. An effective method of toughness."

"If you want to enhance the toughness of high-temperature copper-carbon-silver composite materials through plating, it may be difficult to do so. Even, it can destroy the surface crystal structure to a certain extent, causing superconducting failure."

"But since you proposed this idea, there must be other ways, what is it?"

Xu Chuan smiled and said: "That's right, neither the traditional coating method nor ion sputtering may be able to solve the toughness problem of high-temperature copper-carbon-silver composite materials. It may even cause doping problems due to the coating."

"But we can change the way of thinking. Since the molten droplet will produce a metal phase, let it not be produced."

"In the traditional methods of toughening ceramic materials, there is such a way."

Hearing this, Zhang Pingxiang blurted out: "Whiskers (fibers) are toughened!"

Xu Chuan nodded with a smile, and continued: "Yes, the mechanism of whisker (fiber) toughening is mainly that when the whisker or fiber is pulled out and broken, it consumes a certain amount of energy, which is conducive to preventing the expansion of cracks and improving the strength of the crack. material fracture toughness."

"And the combination of the toughened material and the original substrate is not a simple mixture, it is an organic composite, which is organically combined through a very thin interface, and then improves the bonding strength between the interface and the matrix."

"In this way, it should be able to solve the problem of crystal structure destruction of the raw materials caused by the droplet metal phase and doping. In addition, its properties similar to thin film composites will not greatly affect the transfer of electrons by the superconducting material itself. "

"It's just that we need to find a suitable toughening material, I'm afraid."

Zhang Pingxiang took the words and continued: "I'm afraid it is very difficult. To use whiskers (fibers) for toughening, the elastic coefficient of the reinforcing material must be higher than the original matrix; and the toughening and matrix must be compatible. of."

"The first condition is okay, there are many materials with higher elastic coefficients than ceramic series materials; but the second condition is more troublesome, because of the characteristics of superconducting materials, if compatible, this may lead to superconducting energy gaps expired."

Xu Chuan smiled and said, "You can only deal with one side and keep the integrity of the other side."

Zhang Pingxiang thought for a while, and said: "It is indeed possible, but the effect of single-sided treatment may not be so good. But for high-temperature copper-carbon-silver composite superconducting materials, as long as a certain coefficient can be improved."

"This method may really be feasible, but which material to choose as the whisker (fiber) toughening material needs to be carefully considered."

Touching the stubble on his chin, this academician Zhang fell into deep thought. After a while, he suddenly came back to look at Xu Chuan: "Since you proposed this method, you must have thought about which material to use as an augmentation material. Tough material, right?"

Xu Chuan nodded with a smile, and said, "I have indeed considered it."

"What material?" Zhang Pingxiang asked quickly.

"Graphene!"

PS: The computer has not been repaired yet, and typing on a mobile phone is too slow, so let’s do it for today.

Another: Is there anyone who knows about notebooks, can you recommend a game book between 6000-8000 yuan?