Chapter 167: Having worked in the system, it’s different
After having many experiences of carrying out projects independently.
Xu You is used to starting his thinking at a relatively high point.
This was a way of thinking that Xu You had never had before when participating in competitions.
When you are given a clear problem, all we need to do is to solve the problem based on the conditions of the problem.
Even though the difficulty of the questions varies, this point is the same.
In actual scientific research work.
There is never any fixed problem.
Choosing a topic itself is a very particular matter.
Of course, Xu You did not stop his work now.
In the state of deep learning, Xu You can think about another problem while doing simple work.
In fact, nickel-based high-temperature coating, as a commonly used titanium alloy coating, does not have any problems in itself.
Because the nickel-based alloy coating has high bonding strength , good wear resistance, and excellent corrosion resistance.
But at the same time, nickel-based alloy coatings also have their own limitations.
The difference in diffusion rates between the elements in the nickel-based alloy coating and the substrate will cause the formation of Kirkendall voids.
As a result, the coating becomes unstable and the bonding strength between the coating and the substrate is reduced.
Xu You thought that maybe he could consider trying to replace another material.
In his mind, Xu You was rapidly thinking about the various materials that might be used as coatings.
Because Xu You had previously studied metal materials under Xu Zhou, he was familiar with the properties of various materials.
Recently at the launch center, Xu You also read a lot of aerospace-related books and has a relatively good understanding of a lot of aerospace knowledge.
"That's right, aluminum!"
At this moment, Xu You suddenly remembered the familiar metal element "aluminum".
In the very beginning of his superconductivity experiments, Xu You proposed that aluminum atomic clusters might have the properties of high-temperature superconductivity.
Xu You is very familiar with the element aluminum.
The reason why Xu You thought of using aluminum as a coating is that aluminum can be oxidized at a certain temperature to form a dense AI2O3 oxide film, which can theoretically effectively protect the substrate.
Of course, if only pure aluminum is used for coating, the effect will definitely not be so ideal.
If such a simple solution were feasible, someone would have done it long ago.
If you want to have better coating properties, you have to think from the perspective of aluminum alloy.
At this time, Xu You had a new idea.
"If the coating is prepared from the direction of titanium-aluminum alloy, it may be a more ideal direction."
Titanium-aluminum intermetallic compound is an emerging high-temperature structural metal material.
Because the chemical composition difference between the titanium-aluminum coating and the titanium alloy substrate is relatively small.
At high temperatures, the degree of interdiffusion between the coating and the substrate will also be small.
This will make the titanium-aluminum coating have excellent oxidation resistance.
Moreover, the aluminum element can also play a role in grain refinement and strengthening, which can improve the thermal stability of titanium alloy.
Thinking of this, Xu You felt that he could try to use titanium-aluminum alloy instead of nickel-based alloy in the software to conduct new simulation experiments.
Of course, there is a lot of work to do when simulating with a new material.
If the properties of the material cannot be fully reflected in the software.
The simulation effect will be very poor.
In order to present the properties of titanium-aluminum alloy materials as accurately as possible, Xu You thought of his father Xu Zhou and asked Xu Zhou for help.
"Professor Xu, have you ever worked with titanium-aluminum-based alloys?"
"I have. It's a new type of material. How come this material will be used in aerospace?"
"Please forgive me for not being able to reveal too much information to you. If it is convenient, could you send me some detailed reference materials?"
"Well, that's certainly no problem."
Xu Zhou vaguely felt that this time when Xu You talked to him, his attitude was more polite than before.
Xu Zhou would naturally not refuse such a small matter, let alone his own son asking him for help.
"By the way, my paper will be published in Science soon. Thanks to your theoretical model and function formula, otherwise I would never be able to write this paper. I'll make you something delicious when I get back!"
"No, it's my honor to help Professor Xu. I can't wait to taste Professor Xu's cooking."
Although Xu You's words were full of politeness.
But Xu Zhou always felt something was strange.
"Could it be that... after working in the system for a while, the way we speak has become official?" Xu Zhouxin said.
But compared to his previous arrogant and domineering attitude, Xu Zhou felt that this was quite good.
After receiving Xu Zhou's information, Xu You used his free time to start simulating the new material.
Although the work in the group itself is already very hard.
But relying on his deep learning state and extraordinary energy, Xu You squeezed out some time and gradually perfected the simulation part of the new material.
By comparing with real experimental data, it is proved that Xu You's simulation effect is still very good.
In the simulation, the titanium-aluminum-based alloy coating performed well, but it also had its own problems.
In binary titanium-aluminum based coatings, when the operating temperature exceeds 850°C, the oxidation resistance will also be seriously reduced.
In order to confirm that the conclusion of this simulation was correct, Xu You asked Xu Zhou to help him conduct an experiment.
"Professor Xu, can you help me do some experiments? They are useless and need not be published for the time being."
Xu Zhou was in a very good mood because he had just published an article in "Science", so he would definitely try his best to meet Xu You's request.
"It's okay, as long as the budget is not too large, it will be fine. Dad, I have enough funds now, so you can rest assured to ask if you have any questions."
Xu Zhou knew that the topic Xu You wanted to work on was definitely not an ordinary topic.
Even if it may not be published for the time being, its value in the future is likely to be very great.
After Xu You explained his idea to Xu Zhou, Xu Zhou quickly started the experiment.
After obtaining the experimental results, it was proved that Xu You’s simulation conclusions were basically correct.
"Xu You, in the binary TiAl coating, there are strict requirements for the amount of Al used. At around 850°C, the coating's oxidation resistance begins to drop sharply."
"Thank you for your hard work. This is very close to my prediction."
After reaching this preliminary conclusion, Xu You did not talk about this matter with Shen Ye or other staff at the launch center.
Xu You knew that such a conclusion could not be immediately used in the application of aerospace materials.
After all, this is not a university, and the purpose is not to publish papers but to apply them.
Xu You still needs to come to more valuable conclusions before considering the next course of action.
